stembolt_failure_dataset.jsonl

{"item": "Airflow to the intake seems restricted; it bogs under throttle.", "label": "{\"defective_part\":\"air filter\",\"diag_likelihood\":0.78}"}
{"item": "Intermittent sputter at high RPM after sitting overnight.", "label": "{\"defective_part\":\"fuel line\",\"diag_likelihood\":0.62}"}
{"item": "Oil seepage around the lower end suggests wear over time.", "label": "{\"defective_part\":\"piston rings\",\"diag_likelihood\":0.71}"}
{"item": "Popping noises then it sputters to a stop.", "label": "{\"defective_part\":\"mini-carburetor\",\"diag_likelihood\":0.96}"}
{"item": "Starts on choke but dies the moment choke is opened.", "label": "{\"defective_part\":\"mini-carburetor\",\"diag_likelihood\":0.92}"}
{"item": "Hard start when cold; once warm it behaves normally.", "label": "{\"defective_part\":\"spark plug\",\"diag_likelihood\":0.58}"}
{"item": "No spark visible at the plug even with a good ground.", "label": "{\"defective_part\":\"ignition coil\",\"diag_likelihood\":0.86}"}
{"item": "Runs for 30 seconds then starves like it’s out of fuel.", "label": "{\"defective_part\":\"fuel filter\",\"diag_likelihood\":0.8}"}
{"item": "Surging idle that oscillates up and down.", "label": "{\"defective_part\":\"governor spring\",\"diag_likelihood\":0.63}"}
{"item": "Idle screw adjustments do almost nothing.", "label": "{\"defective_part\":\"carburetor jet\",\"diag_likelihood\":0.67}"}
{"item": "Strong fuel smell, wet plug, and occasional backfire.", "label": "{\"defective_part\":\"float needle\",\"diag_likelihood\":0.74}"}
{"item": "Fuel drips from the bowl area while parked.", "label": "{\"defective_part\":\"float needle\",\"diag_likelihood\":0.9}"}
{"item": "Engine shakes violently even at low speed.", "label": "{\"defective_part\":\"flywheel\",\"diag_likelihood\":0.55}"}
{"item": "Metallic knock that gets louder under load.", "label": "{\"defective_part\":\"connecting rod\",\"diag_likelihood\":0.79}"}
{"item": "Won’t crank smoothly; feels like it catches once per revolution.", "label": "{\"defective_part\":\"bearing\",\"diag_likelihood\":0.52}"}
{"item": "Recoil pulls but doesn’t engage reliably.", "label": "{\"defective_part\":\"recoil starter\",\"diag_likelihood\":0.84}"}
{"item": "Starter rope frays quickly and retracts slowly.", "label": "{\"defective_part\":\"pull starter rope\",\"diag_likelihood\":0.76}"}
{"item": "Noticeable exhaust leak sound and reduced power.", "label": "{\"defective_part\":\"muffler\",\"diag_likelihood\":0.66}"}
{"item": "Overheats rapidly and smells hot; fan area seems fine.", "label": "{\"defective_part\":\"thermostat\",\"diag_likelihood\":0.49}"}
{"item": "Temperature spikes then drops suddenly while running.", "label": "{\"defective_part\":\"thermostat\",\"diag_likelihood\":0.6}"}
{"item": "Runs rough and stalls when tipped slightly.", "label": "{\"defective_part\":\"tank vent\",\"diag_likelihood\":0.57}"}
{"item": "After a few minutes, the fuel cap hiss is intense.", "label": "{\"defective_part\":\"tank vent\",\"diag_likelihood\":0.73}"}
{"item": "Only runs with primer pumped continuously.", "label": "{\"defective_part\":\"primer bulb\",\"diag_likelihood\":0.88}"}
{"item": "Primer bulb stays collapsed and doesn’t rebound.", "label": "{\"defective_part\":\"primer bulb\",\"diag_likelihood\":0.93}"}
{"item": "Throttle feels sticky; return action is inconsistent.", "label": "{\"defective_part\":\"throttle linkage\",\"diag_likelihood\":0.72}"}
{"item": "Choke lever moves but the engine behavior doesn’t change.", "label": "{\"defective_part\":\"choke plate\",\"diag_likelihood\":0.69}"}
{"item": "Backfires through intake when accelerating.", "label": "{\"defective_part\":\"valve\",\"diag_likelihood\":0.54}"}
{"item": "Compression test shows low compression.", "label": "{\"defective_part\":\"piston rings\",\"diag_likelihood\":0.83}"}
{"item": "Compression is uneven across pulls; occasional puff at breather.", "label": "{\"defective_part\":\"unknown\",\"diag_likelihood\":0.4}"}
{"item": "Oil pooling near the crank exit; sling pattern on housing.", "label": "{\"defective_part\":\"oil seal\",\"diag_likelihood\":0.82}"}
{"item": "Grinding noise near front housing; worsens with RPM.", "label": "{\"defective_part\":\"bearing\",\"diag_likelihood\":0.77}"}
{"item": "Spark is weak and orange; plug gap looks fine.", "label": "{\"defective_part\":\"ignition coil\",\"diag_likelihood\":0.64}"}
{"item": "New plug improved it briefly then symptoms returned.", "label": "{\"defective_part\":\"unknown\",\"diag_likelihood\":0.35}"}
{"item": "Engine hunts at idle but smooths out at mid throttle.", "label": "{\"defective_part\":\"mini-carburetor\",\"diag_likelihood\":0.61}"}
{"item": "Fuel consumption is abnormally high with black smoke.", "label": "{\"defective_part\":\"mini-carburetor\",\"diag_likelihood\":0.73}"}
{"item": "Black smoke and soot around exhaust outlet.", "label": "{\"defective_part\":\"mini-carburetor\",\"diag_likelihood\":0.59}"}
{"item": "Misfire only when the machine is hot.", "label": "{\"defective_part\":\"spark plug\",\"diag_likelihood\":0.46}"}
{"item": "Won’t start after rain; drying it out helps.", "label": "{\"defective_part\":\"ignition coil\",\"diag_likelihood\":0.41}"}
{"item": "Rattling from flywheel area; timing feels off.", "label": "{\"defective_part\":\"flywheel\",\"diag_likelihood\":0.68}"}
{"item": "Repeated shear of the flywheel key after sudden stops.", "label": "{\"defective_part\":\"flywheel\",\"diag_likelihood\":0.85}"}
{"item": "Sharp clank when engaging load; then steady knock.", "label": "{\"defective_part\":\"connecting rod\",\"diag_likelihood\":0.74}"}
{"item": "Power drops under load though it idles okay.", "label": "{\"defective_part\":\"fuel filter\",\"diag_likelihood\":0.65}"}
{"item": "Runs fine at idle but dies on quick throttle.", "label": "{\"defective_part\":\"carburetor jet\",\"diag_likelihood\":0.7}"}
{"item": "Stalls when fuel level gets below half.", "label": "{\"defective_part\":\"fuel line\",\"diag_likelihood\":0.51}"}
{"item": "Random stall, then immediate restart possible.", "label": "{\"defective_part\":\"unknown\",\"diag_likelihood\":0.33}"}
{"item": "Idle is too high even with adjustment backed out.", "label": "{\"defective_part\":\"throttle linkage\",\"diag_likelihood\":0.6}"}
{"item": "Governor seems to overshoot and oscillate under steady load.", "label": "{\"defective_part\":\"governor spring\",\"diag_likelihood\":0.72}"}
{"item": "Clicking from valve cover area and loss of power.", "label": "{\"defective_part\":\"valve\",\"diag_likelihood\":0.58}"}
{"item": "Poor acceleration and constant bog regardless of fuel mix.", "label": "{\"defective_part\":\"air filter\",\"diag_likelihood\":0.55}"}
{"item": "Airbox is clean but it still behaves like it’s choking.", "label": "{\"defective_part\":\"unknown\",\"diag_likelihood\":0.29}"}
{"item": "Fuel dribble from intake throat after shutdown.", "label": "{\"defective_part\":\"float needle\",\"diag_likelihood\":0.79}"}
{"item": "Only runs with the fuel cap slightly loosened.", "label": "{\"defective_part\":\"tank vent\",\"diag_likelihood\":0.87}"}
{"item": "White smoke after startup that clears slowly.", "label": "{\"defective_part\":\"piston rings\",\"diag_likelihood\":0.52}"}
{"item": "Oil smoke persists and worsens with throttle.", "label": "{\"defective_part\":\"piston rings\",\"diag_likelihood\":0.77}"}
{"item": "Exhaust note is muffled, like it’s plugged.", "label": "{\"defective_part\":\"muffler\",\"diag_likelihood\":0.7}"}
{"item": "Muffler glows faintly red under load.", "label": "{\"defective_part\":\"muffler\",\"diag_likelihood\":0.61}"}
{"item": "Recoil binds at one spot, then releases.", "label": "{\"defective_part\":\"recoil starter\",\"diag_likelihood\":0.66}"}
{"item": "Pull cord snaps back violently and bruises knuckles.", "label": "{\"defective_part\":\"recoil starter\",\"diag_likelihood\":0.57}"}
{"item": "Sudden loss of spark when it warms up; then returns after cooling.", "label": "{\"defective_part\":\"ignition coil\",\"diag_likelihood\":0.9}"}
{"item": "Occasional spark, but timing seems inconsistent.", "label": "{\"defective_part\":\"flywheel\",\"diag_likelihood\":0.5}"}
{"item": "Wet air filter element with oily residue.", "label": "{\"defective_part\":\"unknown\",\"diag_likelihood\":0.38}"}
{"item": "Fuel line appears stiff and cracked; leaks under prime.", "label": "{\"defective_part\":\"fuel line\",\"diag_likelihood\":0.94}"}
{"item": "Starts, revs high, then settles into a rough idle.", "label": "{\"defective_part\":\"governor spring\",\"diag_likelihood\":0.47}"}
{"item": "Idle mixture screw has to be nearly closed to run.", "label": "{\"defective_part\":\"mini-carburetor\",\"diag_likelihood\":0.68}"}
{"item": "Throttle response is delayed, then it lurches forward.", "label": "{\"defective_part\":\"throttle linkage\",\"diag_likelihood\":0.56}"}
{"item": "Fuel starvation symptoms appear only on slopes.", "label": "{\"defective_part\":\"fuel filter\",\"diag_likelihood\":0.44}"}
{"item": "Constant ticking and reduced compression; leakdown suggests valves.", "label": "{\"defective_part\":\"valve\",\"diag_likelihood\":0.75}"}
{"item": "Loud knock on decel; oil level is normal.", "label": "{\"defective_part\":\"connecting rod\",\"diag_likelihood\":0.61}"}
{"item": "Engine locks briefly after shutdown, then frees up.", "label": "{\"defective_part\":\"unknown\",\"diag_likelihood\":0.27}"}
{"item": "Visible spark, but it still won’t fire unless plug is replaced.", "label": "{\"defective_part\":\"spark plug\",\"diag_likelihood\":0.81}"}
{"item": "Spark plug fouls quickly with sooty deposits.", "label": "{\"defective_part\":\"mini-carburetor\",\"diag_likelihood\":0.66}"}
{"item": "Repeated stalls after refuel; debris likely entered system.", "label": "{\"defective_part\":\"fuel filter\",\"diag_likelihood\":0.69}"}
{"item": "Primer doesn’t draw fuel; lines look empty.", "label": "{\"defective_part\":\"primer bulb\",\"diag_likelihood\":0.72}"}
{"item": "Choke linkage feels loose and doesn’t hold position.", "label": "{\"defective_part\":\"choke plate\",\"diag_likelihood\":0.48}"}
{"item": "Engine idles only if choke is half engaged.", "label": "{\"defective_part\":\"carburetor jet\",\"diag_likelihood\":0.76}"}
{"item": "Carb bowl is clean but main jet passage seems blocked.", "label": "{\"defective_part\":\"carburetor jet\",\"diag_likelihood\":0.88}"}
{"item": "Fuel overflows after transport; smells like flooding.", "label": "{\"defective_part\":\"float needle\",\"diag_likelihood\":0.67}"}
{"item": "Strong vibration and intermittent spark dropouts at speed.", "label": "{\"defective_part\":\"flywheel\",\"diag_likelihood\":0.43}"}
{"item": "Oil sling inside shroud and dampness at seal lip.", "label": "{\"defective_part\":\"oil seal\",\"diag_likelihood\":0.91}"}
{"item": "Grinding under load; shaft feels rough when spun by hand.", "label": "{\"defective_part\":\"bearing\",\"diag_likelihood\":0.81}"}
{"item": "Pull start is normal, but engine won’t sustain combustion.", "label": "{\"defective_part\":\"unknown\",\"diag_likelihood\":0.31}"}
{"item": "Runs lean; surges and backfires occasionally.", "label": "{\"defective_part\":\"fuel line\",\"diag_likelihood\":0.46}"}
{"item": "Runs rich; stumbling and black smoke on acceleration.", "label": "{\"defective_part\":\"mini-carburetor\",\"diag_likelihood\":0.63}"}
{"item": "Knocking noise started after running low on oil.", "label": "{\"defective_part\":\"connecting rod\",\"diag_likelihood\":0.92}"}
{"item": "Low power and oily exhaust after many hours of use.", "label": "{\"defective_part\":\"piston rings\",\"diag_likelihood\":0.64}"}
{"item": "Engine dies when you quickly open throttle, recovers slowly.", "label": "{\"defective_part\":\"air filter\",\"diag_likelihood\":0.42}"}
{"item": "Recoil won’t retract fully unless guided by hand.", "label": "{\"defective_part\":\"recoil starter\",\"diag_likelihood\":0.88}"}
{"item": "Repeated plug failures; electrode looks overheated.", "label": "{\"defective_part\":\"spark plug\",\"diag_likelihood\":0.6}"}
{"item": "No-start after storage; fuel is present but spark is absent.", "label": "{\"defective_part\":\"ignition coil\",\"diag_likelihood\":0.73}"}
{"item": "Runs only at wide open throttle; idle is unstable.", "label": "{\"defective_part\":\"governor spring\",\"diag_likelihood\":0.51}"}
{"item": "Persistent hissing near exhaust flange; soot pattern present.", "label": "{\"defective_part\":\"muffler\",\"diag_likelihood\":0.58}"}
{"item": "Fuel cap area vents poorly; engine stumbles after 5 minutes.", "label": "{\"defective_part\":\"tank vent\",\"diag_likelihood\":0.79}"}
{"item": "Primer bulb cracks and leaks when pressed.", "label": "{\"defective_part\":\"primer bulb\",\"diag_likelihood\":0.97}"}
{"item": "Engine backfires and kicks back on pull.", "label": "{\"defective_part\":\"flywheel\",\"diag_likelihood\":0.73}"}
{"item": "Stalls randomly; no consistent fuel or spark pattern found.", "label": "{\"defective_part\":\"unknown\",\"diag_likelihood\":0.22}"}
{"item": "Starts then immediately floods; plug is soaked.", "label": "{\"defective_part\":\"float needle\",\"diag_likelihood\":0.85}"}
{"item": "Only runs if you feather throttle constantly.", "label": "{\"defective_part\":\"throttle linkage\",\"diag_likelihood\":0.49}"}
{"item": "Idle is rough; adjusting mixture helps a bit but never stable.", "label": "{\"defective_part\":\"mini-carburetor\",\"diag_likelihood\":0.54}"}
{"item": "Rapid clicking and low compression after overheating event.", "label": "{\"defective_part\":\"valve\",\"diag_likelihood\":0.62}"}
{"item": "Oil leak worsens at higher RPM, localized near crank exit.", "label": "{\"defective_part\":\"oil seal\",\"diag_likelihood\":0.74}"}
{"item": "Power loss and sputter began right after replacing fuel line.", "label": "{\"defective_part\":\"unknown\",\"diag_likelihood\":0.28}"}
{"item": "Engine bogs; air path is clean, fuel flow seems intermittent.", "label": "{\"defective_part\":\"fuel filter\",\"diag_likelihood\":0.53}"}
{"item": "Clattering noise and vibration started suddenly under load.", "label": "{\"defective_part\":\"connecting rod\",\"diag_likelihood\":0.68}"}
{"item": "Runs okay for a while, then surges and dies; restarts later.", "label": "{\"defective_part\":\"tank vent\",\"diag_likelihood\":0.56}"}
{"item": "Stembolt idles fine, but the moment I crack the throttle it coughs like a Husky on its 14th pull.", "label": "{\"defective_part\":\"carburetor diaphragm\",\"diag_likelihood\":0.92}"}
{"item": "Intermittent stall after warmup on a Stihl-ish power head; restart takes forever unless I let it sulk.", "label": "{\"defective_part\":\"ignition coil\",\"diag_likelihood\":0.74}"}
{"item": "Fuel smell near the rear handle and wetness around the tank outlet after sitting overnight.", "label": "{\"defective_part\":\"fuel line\",\"diag_likelihood\":0.93}"}
{"item": "Starts once, then dies the second I tip the stembolt sideways.", "label": "{\"defective_part\":\"fuel pickup filter\",\"diag_likelihood\":0.86}"}
{"item": "Sputters under load; exhaust note goes flat like the muffler is stuffed with pine needles.", "label": "{\"defective_part\":\"spark arrestor screen\",\"diag_likelihood\":0.88}"}
{"item": "Chain creeps at idle even with the idle screw backed out.", "label": "{\"defective_part\":\"clutch springs\",\"diag_likelihood\":0.83}"}
{"item": "No pop at all; plug looks dry, like we’re not even invited to the combustion party.", "label": "{\"defective_part\":\"spark plug\",\"diag_likelihood\":0.77}"}
{"item": "Primer bulb won’t fill; it just collapses and stays sad.", "label": "{\"defective_part\":\"primer bulb\",\"diag_likelihood\":0.9}"}
{"item": "Stembolt runs for 30 seconds then dies like a Stihl in a snarky forum thread.", "label": "{\"defective_part\":\"tank vent\",\"diag_likelihood\":0.82}"}
{"item": "Idle hunts up and down; sometimes it surges like it’s trying to tell me a secret.", "label": "{\"defective_part\":\"air leak at crank seal\",\"diag_likelihood\":0.71}"}
{"item": "Hard to start cold; when it does, it only runs on half-choke.", "label": "{\"defective_part\":\"carburetor metering lever\",\"diag_likelihood\":0.79}"}
{"item": "Bogging only at full throttle; half throttle is smooth.", "label": "{\"defective_part\":\"main jet obstruction\",\"diag_likelihood\":0.84}"}
{"item": "Oil reservoir stays full; bar turns blue and smells like regret.", "label": "{\"defective_part\":\"oil pump\",\"diag_likelihood\":0.95}"}
{"item": "Oiler works sometimes, but only when I smack the side cover like it owes me money.", "label": "{\"defective_part\":\"oil pickup line\",\"diag_likelihood\":0.73}"}
{"item": "Rope pulls easy with almost no resistance; it feels…wrong.", "label": "{\"defective_part\":\"piston rings\",\"diag_likelihood\":0.8}"}
{"item": "Compression feels decent, but it won’t hold an idle without dying.", "label": "{\"defective_part\":\"idle circuit blockage\",\"diag_likelihood\":0.76}"}
{"item": "Cuts out when I hit the throttle from idle; a brief ‘pop’ then silence.", "label": "{\"defective_part\":\"impulse line\",\"diag_likelihood\":0.85}"}
{"item": "Stembolt starts, revs to the moon, then seizes into a dramatic pause.", "label": "{\"defective_part\":\"lean condition from air leak\",\"diag_likelihood\":0.69}"}
{"item": "Runs rich; plug is black and wet; exhaust smokes like a campfire in a rainstorm.", "label": "{\"defective_part\":\"carburetor needle valve\",\"diag_likelihood\":0.78}"}
{"item": "Random shutdown when I bump the handle; jiggling the wiring makes it come back.", "label": "{\"defective_part\":\"kill switch\",\"diag_likelihood\":0.88}"}
{"item": "Starter rope won’t retract; it just hangs there like a defeated flag.", "label": "{\"defective_part\":\"recoil spring\",\"diag_likelihood\":0.95}"}
{"item": "Rope retracts, but sometimes slips and makes a crunchy clicking noise.", "label": "{\"defective_part\":\"starter pawls\",\"diag_likelihood\":0.9}"}
{"item": "Chain brake won’t disengage smoothly; lever feels gritty.", "label": "{\"defective_part\":\"chain brake band\",\"diag_likelihood\":0.87}"}
{"item": "Stembolt vibrates like it’s trying to break free and join a Husqvarna fan club.", "label": "{\"defective_part\":\"anti-vibration mounts\",\"diag_likelihood\":0.83}"}
{"item": "Sudden loss of power, metallic rattle under load, then it calms down at idle.", "label": "{\"defective_part\":\"piston scoring\",\"diag_likelihood\":0.72}"}
{"item": "Won’t start after refuel; strong fuel smell and a wet air filter.", "label": "{\"defective_part\":\"flooded carburetor\",\"diag_likelihood\":0.77}"}
{"item": "Only starts if I hold the throttle wide open like I’m negotiating with it.", "label": "{\"defective_part\":\"spark plug\",\"diag_likelihood\":0.63}"}
{"item": "Starts, then dies the moment I release the trigger; idle screw changes do nothing.", "label": "{\"defective_part\":\"idle speed screw\",\"diag_likelihood\":0.6}"}
{"item": "Throttle trigger feels sticky and doesn’t snap back cleanly.", "label": "{\"defective_part\":\"throttle linkage\",\"diag_likelihood\":0.82}"}
{"item": "Runs fine for a minute, then goes lean and screams; backing off saves it.", "label": "{\"defective_part\":\"tank vent\",\"diag_likelihood\":0.84}"}
{"item": "Fuel line looks fine, but it’s stiff as plastic and cracks when bent.", "label": "{\"defective_part\":\"fuel line\",\"diag_likelihood\":0.91}"}
{"item": "Misfire at high RPM; sounds like popcorn in the muffler.", "label": "{\"defective_part\":\"spark plug boot\",\"diag_likelihood\":0.7}"}
{"item": "Spark is weak and orange; only occasional ignition.", "label": "{\"defective_part\":\"ignition coil\",\"diag_likelihood\":0.86}"}
{"item": "Stembolt dies when I tilt it left, but not right.", "label": "{\"defective_part\":\"fuel pickup filter\",\"diag_likelihood\":0.82}"}
{"item": "Idle fine; cut quality awful; chain slows and then grabs.", "label": "{\"defective_part\":\"clutch drum bearing\",\"diag_likelihood\":0.68}"}
{"item": "Chain won’t move even at full throttle; engine revs freely.", "label": "{\"defective_part\":\"clutch\",\"diag_likelihood\":0.9}"}
{"item": "Engine labors; chain turns, but it feels like it’s dragging through syrup.", "label": "{\"defective_part\":\"bar sprocket nose\",\"diag_likelihood\":0.62}"}
{"item": "Bar oil leaks out the bottom when stored; puddle forms by morning.", "label": "{\"defective_part\":\"oil tank cap seal\",\"diag_likelihood\":0.8}"}
{"item": "Pull cord jerks violently at compression stroke; starting is a wrist workout.", "label": "{\"defective_part\":\"decompression valve\",\"diag_likelihood\":0.79}"}
{"item": "Decomp button won’t stay down; it pops back up immediately.", "label": "{\"defective_part\":\"decompression valve\",\"diag_likelihood\":0.88}"}
{"item": "Stembolt refuses to start unless I whisper ‘Stihl is better’ into the airbox.", "label": "{\"defective_part\":\"choke linkage\",\"diag_likelihood\":0.55}"}
{"item": "Choke lever moves, but butterfly doesn’t close all the way.", "label": "{\"defective_part\":\"choke linkage\",\"diag_likelihood\":0.86}"}
{"item": "Very high idle after carb tweak; chain spins even with brake off and throttle untouched.", "label": "{\"defective_part\":\"air leak at intake boot\",\"diag_likelihood\":0.75}"}
{"item": "Hanging idle that slowly drops after revving.", "label": "{\"defective_part\":\"air leak at crank seal\",\"diag_likelihood\":0.73}"}
{"item": "Engine revs, then sags like it’s starving; primer bulb shows bubbles.", "label": "{\"defective_part\":\"fuel line air leak\",\"diag_likelihood\":0.81}"}
{"item": "Primer bulb fills with foamy fuel; stembolt gets inconsistent.", "label": "{\"defective_part\":\"fuel line air leak\",\"diag_likelihood\":0.77}"}
{"item": "Won’t start; plug is wet; spark is good; feels like too much fuel.", "label": "{\"defective_part\":\"carburetor metering needle\",\"diag_likelihood\":0.78}"}
{"item": "Starts and immediately runs away at max RPM like it’s late for a Husky meetup.", "label": "{\"defective_part\":\"idle circuit air leak\",\"diag_likelihood\":0.66}"}
{"item": "Burbling rich idle; throttle response lazy; lots of smoke.", "label": "{\"defective_part\":\"air filter\",\"diag_likelihood\":0.85}"}
{"item": "Air filter is soaked with oily dust; engine chokes itself out.", "label": "{\"defective_part\":\"air filter\",\"diag_likelihood\":0.9}"}
{"item": "Power falls off after a few cuts; exhaust gets hotter; muffler smells scorched.", "label": "{\"defective_part\":\"spark arrestor screen\",\"diag_likelihood\":0.8}"}
{"item": "Stembolt starts, runs, then dies when I set it down on the ground.", "label": "{\"defective_part\":\"kill switch wiring\",\"diag_likelihood\":0.7}"}
{"item": "Random shutoff when I squeeze the handle; seems like a pinch point in the harness.", "label": "{\"defective_part\":\"kill switch wiring\",\"diag_likelihood\":0.79}"}
{"item": "Clutch cover area gets very hot; chain intermittently locks.", "label": "{\"defective_part\":\"clutch drum bearing\",\"diag_likelihood\":0.74}"}
{"item": "Chain brake engages by itself with vibration.", "label": "{\"defective_part\":\"chain brake spring\",\"diag_likelihood\":0.76}"}
{"item": "Chain brake feels mushy; doesn’t snap decisively.", "label": "{\"defective_part\":\"chain brake spring\",\"diag_likelihood\":0.82}"}
{"item": "Stembolt won’t oil at idle but oils when revved hard.", "label": "{\"defective_part\":\"oil pump worm gear\",\"diag_likelihood\":0.71}"}
{"item": "Oiler output is weak even at full; bar looks dry.", "label": "{\"defective_part\":\"oil pump\",\"diag_likelihood\":0.87}"}
{"item": "Sudden squeal from the flywheel side after rev; then it dies.", "label": "{\"defective_part\":\"crank bearing\",\"diag_likelihood\":0.61}"}
{"item": "Metallic grinding when pulling the rope; feels rough through the stroke.", "label": "{\"defective_part\":\"crank bearing\",\"diag_likelihood\":0.66}"}
{"item": "Starts great, but won’t restart hot unless I open the fuel cap.", "label": "{\"defective_part\":\"tank vent\",\"diag_likelihood\":0.91}"}
{"item": "Hot start is terrible; cold start is okay; spark seems inconsistent when warm.", "label": "{\"defective_part\":\"ignition coil\",\"diag_likelihood\":0.78}"}
{"item": "Won’t hold tune; L and H needles drift like they’re haunted.", "label": "{\"defective_part\":\"carburetor diaphragm\",\"diag_likelihood\":0.7}"}
{"item": "Needs choke to keep running even after it’s warm.", "label": "{\"defective_part\":\"air leak at intake boot\",\"diag_likelihood\":0.68}"}
{"item": "Idle is okay, but it dies when I blip the throttle quickly.", "label": "{\"defective_part\":\"accelerator pump circuit\",\"diag_likelihood\":0.64}"}
{"item": "Throttle cable is frayed and catches; trigger sometimes sticks open (cool cool).", "label": "{\"defective_part\":\"throttle cable\",\"diag_likelihood\":0.9}"}
{"item": "Stembolt slowly loses compression over weeks; starts getting ‘soft’ on the rope.", "label": "{\"defective_part\":\"piston rings\",\"diag_likelihood\":0.73}"}
{"item": "Scored piston visible through exhaust port; it still runs, but it’s not happy.", "label": "{\"defective_part\":\"piston scoring\",\"diag_likelihood\":0.96}"}
{"item": "Exhaust port looks carboned up; power is down and it’s smoky.", "label": "{\"defective_part\":\"muffler baffle carbon buildup\",\"diag_likelihood\":0.7}"}
{"item": "Backfires through intake; pops the airbox cover loose.", "label": "{\"defective_part\":\"ignition timing issue\",\"diag_likelihood\":0.58}"}
{"item": "Flywheel key looks slightly sheared; weird timing symptoms after a sudden stop.", "label": "{\"defective_part\":\"flywheel key\",\"diag_likelihood\":0.88}"}
{"item": "Starts on choke, dies on run; classic ‘only on choke’ behavior.", "label": "{\"defective_part\":\"fuel filter\",\"diag_likelihood\":0.86}"}
{"item": "Fuel filter is dark and heavy; flow seems reduced.", "label": "{\"defective_part\":\"fuel filter\",\"diag_likelihood\":0.92}"}
{"item": "Carb won’t prime; fuel lines are routed right but nothing moves.", "label": "{\"defective_part\":\"impulse line\",\"diag_likelihood\":0.9}"}
{"item": "Impulse line has a hairline crack at the nipple.", "label": "{\"defective_part\":\"impulse line\",\"diag_likelihood\":0.95}"}
{"item": "High-pitched whine at idle; clutch drum seems wobbly.", "label": "{\"defective_part\":\"clutch drum bearing\",\"diag_likelihood\":0.72}"}
{"item": "Stembolt idles, but clutch grabs late and chatters.", "label": "{\"defective_part\":\"clutch shoes\",\"diag_likelihood\":0.74}"}
{"item": "Chain sprocket teeth are hooked like little sharks.", "label": "{\"defective_part\":\"drive sprocket\",\"diag_likelihood\":0.89}"}
{"item": "Chain slips and surges; sprocket visibly worn.", "label": "{\"defective_part\":\"drive sprocket\",\"diag_likelihood\":0.87}"}
{"item": "Chain tension changes constantly during cuts; bar rails look uneven.", "label": "{\"defective_part\":\"guide bar rails\",\"diag_likelihood\":0.65}"}
{"item": "Chain gets dry fast; oil hole alignment seems off.", "label": "{\"defective_part\":\"bar oil port blockage\",\"diag_likelihood\":0.81}"}
{"item": "Stembolt leaks fuel from carb throat when parked.", "label": "{\"defective_part\":\"carburetor needle valve\",\"diag_likelihood\":0.9}"}
{"item": "Metering lever height seems off; flooding on restart.", "label": "{\"defective_part\":\"carburetor metering lever\",\"diag_likelihood\":0.84}"}
{"item": "Runs lean no matter how I adjust; I suspect it’s sucking air somewhere sneaky.", "label": "{\"defective_part\":\"intake boot crack\",\"diag_likelihood\":0.73}"}
{"item": "Intake boot has visible split at the clamp.", "label": "{\"defective_part\":\"intake boot crack\",\"diag_likelihood\":0.96}"}
{"item": "Stembolt dies when I engage the chain brake at idle (shouldn’t happen).", "label": "{\"defective_part\":\"idle speed too low\",\"diag_likelihood\":0.62}"}
{"item": "It stalls under sudden load; idle set too low to recover.", "label": "{\"defective_part\":\"idle speed screw\",\"diag_likelihood\":0.66}"}
{"item": "Starts, revs, then dies after a minute; fuel cap hisses when opened.", "label": "{\"defective_part\":\"tank vent\",\"diag_likelihood\":0.93}"}
{"item": "Stembolt only runs with cap slightly loose; otherwise it starves.", "label": "{\"defective_part\":\"tank vent\",\"diag_likelihood\":0.95}"}
{"item": "Spark plug is cracked porcelain; misfires at random.", "label": "{\"defective_part\":\"spark plug\",\"diag_likelihood\":0.94}"}
{"item": "Spark plug gap is huge; someone ‘tuned’ it with a screwdriver and vibes.", "label": "{\"defective_part\":\"spark plug\",\"diag_likelihood\":0.86}"}
{"item": "Excessive vibration and the handle feels detached from reality.", "label": "{\"defective_part\":\"anti-vibration mounts\",\"diag_likelihood\":0.91}"}
{"item": "AV mount is torn; stembolt buzzes like an angry hornet nest.", "label": "{\"defective_part\":\"anti-vibration mounts\",\"diag_likelihood\":0.95}"}
{"item": "Oil pump drive gear looks chewed; intermittent oiling.", "label": "{\"defective_part\":\"oil pump worm gear\",\"diag_likelihood\":0.88}"}
{"item": "Oil line is kinked behind the clutch cover; no oil reaches the bar.", "label": "{\"defective_part\":\"oil line\",\"diag_likelihood\":0.9}"}
{"item": "Stembolt starts after many tries; feels like it only starts when it feels appreciated (Husky energy).", "label": "{\"defective_part\":\"carburetor diaphragm\",\"diag_likelihood\":0.6}"}
{"item": "Won’t start unless I prime repeatedly; primer takes 12 pushes to fill.", "label": "{\"defective_part\":\"primer bulb check valve\",\"diag_likelihood\":0.75}"}
{"item": "Primer bulb check valve seems stuck; fuel moves backward.", "label": "{\"defective_part\":\"primer bulb check valve\",\"diag_likelihood\":0.87}"}
{"item": "Engine idles, but dies when I pick it up by the top handle.", "label": "{\"defective_part\":\"loose ground wire\",\"diag_likelihood\":0.67}"}
{"item": "Ground wire near coil is loose; spark intermittent on vibration.", "label": "{\"defective_part\":\"loose ground wire\",\"diag_likelihood\":0.9}"}
{"item": "Stembolt loses power and makes a ‘ting-ting’ sound at high RPM.", "label": "{\"defective_part\":\"detonation from lean mix\",\"diag_likelihood\":0.58}"}
{"item": "Runs hot; cylinder fins packed with chips and oily dust.", "label": "{\"defective_part\":\"cooling fins blockage\",\"diag_likelihood\":0.85}"}
{"item": "Cooling fins are clogged; it overheats and fades under load.", "label": "{\"defective_part\":\"cooling fins blockage\",\"diag_likelihood\":0.88}"}
{"item": "Muffler bolts are loose; exhaust leaks and it’s loud enough to startle squirrels.", "label": "{\"defective_part\":\"muffler gasket\",\"diag_likelihood\":0.78}"}
{"item": "Exhaust leak visible around muffler; soot marks on the case.", "label": "{\"defective_part\":\"muffler gasket\",\"diag_likelihood\":0.91}"}
{"item": "Chain won’t oil; oil tank is full; pump looks fine; bar is bone dry.", "label": "{\"defective_part\":\"bar oil port blockage\",\"diag_likelihood\":0.86}"}
{"item": "Bar oil holes packed with sawdust paste.", "label": "{\"defective_part\":\"bar oil port blockage\",\"diag_likelihood\":0.94}"}
{"item": "Throttle plate doesn’t return fully closed; idle stays high.", "label": "{\"defective_part\":\"throttle linkage\",\"diag_likelihood\":0.83}"}
{"item": "Idle is too high even on lowest setting; it ‘hangs’ after revving.", "label": "{\"defective_part\":\"air leak at crank seal\",\"diag_likelihood\":0.71}"}
{"item": "Stembolt idles high and chain spins; spray test changes RPM near the seal.", "label": "{\"defective_part\":\"air leak at crank seal\",\"diag_likelihood\":0.86}"}
{"item": "It dies when I tap the carb body; then it comes back after a minute.", "label": "{\"defective_part\":\"carburetor metering diaphragm\",\"diag_likelihood\":0.7}"}
{"item": "Metering diaphragm is stiff like cardboard; fuel delivery inconsistent.", "label": "{\"defective_part\":\"carburetor metering diaphragm\",\"diag_likelihood\":0.93}"}
{"item": "Fuel looks milky; old mix from last season; performance is chaos.", "label": "{\"defective_part\":\"stale fuel\",\"diag_likelihood\":0.8}"}
{"item": "Stale mix in the tank; it runs rough and won’t rev clean.", "label": "{\"defective_part\":\"stale fuel\",\"diag_likelihood\":0.88}"}
{"item": "Starts, then bogs when I pinch the throttle; like it can’t breathe.", "label": "{\"defective_part\":\"air filter\",\"diag_likelihood\":0.74}"}
{"item": "Air filter is caked; airflow restricted; throttle response dull.", "label": "{\"defective_part\":\"air filter\",\"diag_likelihood\":0.91}"}
{"item": "Cutting out only when hot; spark disappears after heat soak.", "label": "{\"defective_part\":\"ignition coil\",\"diag_likelihood\":0.87}"}
{"item": "Carb tune drifts as it warms; it becomes lean and touchy.", "label": "{\"defective_part\":\"air leak at intake boot\",\"diag_likelihood\":0.62}"}
{"item": "Fuel line rubs on the case edge; tiny pinhole leak appears under pressure.", "label": "{\"defective_part\":\"fuel line\",\"diag_likelihood\":0.89}"}
{"item": "Stembolt won’t shut off with the switch; I have to choke it to death.", "label": "{\"defective_part\":\"kill switch\",\"diag_likelihood\":0.92}"}
{"item": "Kill switch feels loose; sometimes it won’t stop the engine.", "label": "{\"defective_part\":\"kill switch\",\"diag_likelihood\":0.86}"}
{"item": "Starter rope frays rapidly; pulley edge is sharp.", "label": "{\"defective_part\":\"starter pulley\",\"diag_likelihood\":0.74}"}
{"item": "Recoil pulley has a burr; rope chafes every pull.", "label": "{\"defective_part\":\"starter pulley\",\"diag_likelihood\":0.85}"}
{"item": "Chain brake cover packed with oily sawdust; brake drags.", "label": "{\"defective_part\":\"chain brake contamination\",\"diag_likelihood\":0.8}"}
{"item": "Brake band is glazed and sticky; it won’t release cleanly.", "label": "{\"defective_part\":\"chain brake band\",\"diag_likelihood\":0.84}"}
{"item": "Sprocket cover area full of chips; clutch overheats and grabs.", "label": "{\"defective_part\":\"clutch contamination\",\"diag_likelihood\":0.7}"}
{"item": "Clutch shoes oily; engagement inconsistent.", "label": "{\"defective_part\":\"clutch shoes\",\"diag_likelihood\":0.77}"}
{"item": "Stembolt screams but won’t pull chain in the cut; feels like slipping.", "label": "{\"defective_part\":\"clutch\",\"diag_likelihood\":0.82}"}
{"item": "Carb low-speed adjustment does nothing; idle circuit likely blocked.", "label": "{\"defective_part\":\"idle circuit blockage\",\"diag_likelihood\":0.87}"}
{"item": "Low-speed jet packed with varnish; cleaning helps immediately.", "label": "{\"defective_part\":\"idle circuit blockage\",\"diag_likelihood\":0.93}"}
{"item": "High-speed jet seems blocked; it bogs at WOT no matter what.", "label": "{\"defective_part\":\"main jet obstruction\",\"diag_likelihood\":0.9}"}
{"item": "Stembolt dies when tipped forward; fuel pickup line looks too short.", "label": "{\"defective_part\":\"fuel pickup line\",\"diag_likelihood\":0.78}"}
{"item": "Fuel pickup line has split end; it sucks air intermittently.", "label": "{\"defective_part\":\"fuel pickup line\",\"diag_likelihood\":0.88}"}
{"item": "Sudden clunk then no compression; now it free-spins.", "label": "{\"defective_part\":\"connecting rod failure\",\"diag_likelihood\":0.64}"}
{"item": "Rattle from the top end; power down; plug shows aluminum flecks.", "label": "{\"defective_part\":\"piston scoring\",\"diag_likelihood\":0.81}"}
{"item": "Muffler outlet is clogged with carbon; exhaust choked.", "label": "{\"defective_part\":\"spark arrestor screen\",\"diag_likelihood\":0.86}"}
{"item": "Stembolt only idles with the choke partially on; otherwise it stalls.", "label": "{\"defective_part\":\"fuel filter\",\"diag_likelihood\":0.75}"}
{"item": "Fuel filter is missing entirely; now carb is full of grit.", "label": "{\"defective_part\":\"carburetor contamination\",\"diag_likelihood\":0.73}"}
{"item": "Carb bowl area gritty; metering needle sticks occasionally.", "label": "{\"defective_part\":\"carburetor contamination\",\"diag_likelihood\":0.8}"}
{"item": "Chain oil adjuster screw is stripped; can’t change output.", "label": "{\"defective_part\":\"oiler adjuster\",\"diag_likelihood\":0.72}"}
{"item": "Oiler adjuster is stuck; output won’t increase.", "label": "{\"defective_part\":\"oiler adjuster\",\"diag_likelihood\":0.79}"}
{"item": "Stembolt starts then immediately stops when I touch the throttle (instant drama).", "label": "{\"defective_part\":\"impulse line\",\"diag_likelihood\":0.72}"}
{"item": "Impulse line disconnected; carb won’t pump fuel under throttle.", "label": "{\"defective_part\":\"impulse line\",\"diag_likelihood\":0.96}"}
{"item": "Stembolt gets louder over time; muffler bolts keep loosening.", "label": "{\"defective_part\":\"muffler bolts\",\"diag_likelihood\":0.7}"}
{"item": "Muffler bolts are missing one; gasket leaks.", "label": "{\"defective_part\":\"muffler gasket\",\"diag_likelihood\":0.82}"}
{"item": "It surges at idle and calms when I press the carb lightly.", "label": "{\"defective_part\":\"intake boot clamp loose\",\"diag_likelihood\":0.78}"}
{"item": "Intake boot clamp was loose; tightening stabilizes idle.", "label": "{\"defective_part\":\"intake boot clamp loose\",\"diag_likelihood\":0.92}"}
{"item": "Throttle won’t return; spring seems weak or unhooked.", "label": "{\"defective_part\":\"throttle return spring\",\"diag_likelihood\":0.9}"}
{"item": "Throttle return spring unseated; trigger sticks partially open.", "label": "{\"defective_part\":\"throttle return spring\",\"diag_likelihood\":0.93}"}
{"item": "Stembolt idles fine but dies as soon as chain bites wood.", "label": "{\"defective_part\":\"carburetor tune too lean\",\"diag_likelihood\":0.66}"}
{"item": "H needle set too lean; it screams and then falls on its face under load.", "label": "{\"defective_part\":\"carburetor tune too lean\",\"diag_likelihood\":0.78}"}
{"item": "It four-strokes heavily at WOT; rich and blubbery.", "label": "{\"defective_part\":\"carburetor tune too rich\",\"diag_likelihood\":0.77}"}
{"item": "H needle too rich; lots of smoke and poor top-end power.", "label": "{\"defective_part\":\"carburetor tune too rich\",\"diag_likelihood\":0.82}"}
{"item": "Won’t start and the spark plug wire is barely seated on the plug.", "label": "{\"defective_part\":\"spark plug boot\",\"diag_likelihood\":0.92}"}
{"item": "Spark plug boot is torn; arcing visible in low light.", "label": "{\"defective_part\":\"spark plug boot\",\"diag_likelihood\":0.88}"}
{"item": "Stembolt won’t prime; fuel lines swapped on the carb nipples.", "label": "{\"defective_part\":\"fuel line routing\",\"diag_likelihood\":0.9}"}
{"item": "Fuel return and feed lines reversed; primer behavior weird.", "label": "{\"defective_part\":\"fuel line routing\",\"diag_likelihood\":0.93}"}
{"item": "It starts, revs, then quits when I let it idle; like it can’t hold low speed.", "label": "{\"defective_part\":\"idle circuit blockage\",\"diag_likelihood\":0.79}"}
{"item": "Idle mixture screw is missing O-ring; air leaks past threads.", "label": "{\"defective_part\":\"idle mixture screw o-ring\",\"diag_likelihood\":0.81}"}
{"item": "Idle mixture screw O-ring cracked; tuning is unstable.", "label": "{\"defective_part\":\"idle mixture screw o-ring\",\"diag_likelihood\":0.88}"}
{"item": "Stembolt runs, but power is down; exhaust is loud and tinny.", "label": "{\"defective_part\":\"muffler baffle loose\",\"diag_likelihood\":0.6}"}
{"item": "Muffler baffle rattles internally; performance reduced.", "label": "{\"defective_part\":\"muffler baffle loose\",\"diag_likelihood\":0.67}"}
{"item": "Chain throws oil sideways; oil outlet seal seems torn.", "label": "{\"defective_part\":\"oil outlet seal\",\"diag_likelihood\":0.7}"}
{"item": "Oil outlet seal damaged; leaks inside clutch cover.", "label": "{\"defective_part\":\"oil outlet seal\",\"diag_likelihood\":0.83}"}
{"item": "Stembolt only starts if I do the full Husky ritual: prime, choke, swear, prime again.", "label": "{\"defective_part\":\"carburetor diaphragm\",\"diag_likelihood\":0.58}"}
{"item": "Carb diaphragm stiff; needs excessive priming to start.", "label": "{\"defective_part\":\"carburetor diaphragm\",\"diag_likelihood\":0.85}"}
{"item": "It dies when I open the throttle quickly; slow roll works.", "label": "{\"defective_part\":\"low-speed circuit lean\",\"diag_likelihood\":0.66}"}
{"item": "Low-speed circuit lean; opening throttle fast causes bog.", "label": "{\"defective_part\":\"low-speed circuit lean\",\"diag_likelihood\":0.74}"}
{"item": "Runs fine until I install the air filter cover; then it chokes.", "label": "{\"defective_part\":\"air filter cover misfit\",\"diag_likelihood\":0.69}"}
{"item": "Air filter cover warped; presses on choke linkage.", "label": "{\"defective_part\":\"air filter cover misfit\",\"diag_likelihood\":0.78}"}
{"item": "Stembolt won’t rev; throttle plate only opens halfway.", "label": "{\"defective_part\":\"throttle linkage\",\"diag_likelihood\":0.88}"}
{"item": "Throttle linkage slipped; full trigger doesn’t reach WOT.", "label": "{\"defective_part\":\"throttle linkage\",\"diag_likelihood\":0.92}"}
{"item": "Random spark loss; coil gap to flywheel looks huge.", "label": "{\"defective_part\":\"ignition coil gap\",\"diag_likelihood\":0.76}"}
{"item": "Ignition coil gap set incorrectly; weak spark at RPM.", "label": "{\"defective_part\":\"ignition coil gap\",\"diag_likelihood\":0.85}"}
{"item": "Stembolt stalls with chain brake off and bar in cut; feels underpowered suddenly.", "label": "{\"defective_part\":\"compression loss\",\"diag_likelihood\":0.62}"}
{"item": "Compression low; top end worn; pull is too easy.", "label": "{\"defective_part\":\"piston rings\",\"diag_likelihood\":0.7}"}
{"item": "It starts, then the idle climbs and climbs like it’s searching for enlightenment.", "label": "{\"defective_part\":\"air leak at intake boot\",\"diag_likelihood\":0.71}"}
{"item": "Bar studs are loose; side cover wiggles; chain tension won’t hold.", "label": "{\"defective_part\":\"bar studs\",\"diag_likelihood\":0.86}"}
{"item": "Chain tensioner won’t engage; screw spins freely.", "label": "{\"defective_part\":\"chain tensioner\",\"diag_likelihood\":0.92}"}
{"item": "Tensioner pawl stripped; cannot adjust chain tension.", "label": "{\"defective_part\":\"chain tensioner\",\"diag_likelihood\":0.94}"}
{"item": "Stembolt idles, but chain oil flings only in bursts.", "label": "{\"defective_part\":\"oil pickup line\",\"diag_likelihood\":0.66}"}
{"item": "Oil pickup line intermittently sucks air; oiling pulses.", "label": "{\"defective_part\":\"oil pickup line\",\"diag_likelihood\":0.77}"}
{"item": "Engine dies when I flip the switch to RUN (yes, really).", "label": "{\"defective_part\":\"kill switch wiring\",\"diag_likelihood\":0.81}"}
{"item": "Kill switch wiring shorted; RUN position grounds ignition.", "label": "{\"defective_part\":\"kill switch wiring\",\"diag_likelihood\":0.9}"}
{"item": "Stembolt won’t start; decompression valve stuck open.", "label": "{\"defective_part\":\"decompression valve\",\"diag_likelihood\":0.84}"}
{"item": "Decompression valve carboned up; won’t seal; low compression at start.", "label": "{\"defective_part\":\"decompression valve\",\"diag_likelihood\":0.79}"}
{"item": "It runs, but the chain brake won’t stop the chain reliably.", "label": "{\"defective_part\":\"chain brake band\",\"diag_likelihood\":0.73}"}
{"item": "Brake band worn thin; braking weak.", "label": "{\"defective_part\":\"chain brake band\",\"diag_likelihood\":0.88}"}
{"item": "Stembolt acts normal until it hits a knot; then it bogs hard and dies.", "label": "{\"defective_part\":\"carburetor tune too lean\",\"diag_likelihood\":0.7}"}
{"item": "Bogging under load; H needle too lean for sustained cutting.", "label": "{\"defective_part\":\"carburetor tune too lean\",\"diag_likelihood\":0.76}"}
{"item": "Stembolt dies and won’t restart; plug is dry; tank is half full.", "label": "{\"defective_part\":\"fuel filter\",\"diag_likelihood\":0.68}"}
{"item": "Fuel filter clogged; starvation causes dry plug and stall.", "label": "{\"defective_part\":\"fuel filter\",\"diag_likelihood\":0.86}"}
{"item": "It ‘pops’ once on pull then nothing else.", "label": "{\"defective_part\":\"spark plug\",\"diag_likelihood\":0.64}"}
{"item": "One weak pop then dead; plug fouled and shorting.", "label": "{\"defective_part\":\"spark plug\",\"diag_likelihood\":0.78}"}
{"item": "Stembolt starts, idles, but won’t transition; classic stumble.", "label": "{\"defective_part\":\"carburetor transition port blockage\",\"diag_likelihood\":0.74}"}
{"item": "Transition ports varnished; throttle transition is rough.", "label": "{\"defective_part\":\"carburetor transition port blockage\",\"diag_likelihood\":0.86}"}
{"item": "It runs better with the air filter removed (don’t judge me).", "label": "{\"defective_part\":\"air filter\",\"diag_likelihood\":0.82}"}
{"item": "Runs with filter off; filter is restricting airflow excessively.", "label": "{\"defective_part\":\"air filter\",\"diag_likelihood\":0.9}"}
{"item": "Stembolt only dies on decel; rev down and it quits.", "label": "{\"defective_part\":\"low-speed circuit too lean\",\"diag_likelihood\":0.7}"}
{"item": "Decel stall; low-speed circuit too lean or blocked.", "label": "{\"defective_part\":\"low-speed circuit too lean\",\"diag_likelihood\":0.77}"}
{"item": "Idle is unstable; spray test at carb gasket changes RPM.", "label": "{\"defective_part\":\"carburetor gasket leak\",\"diag_likelihood\":0.8}"}
{"item": "Carb gasket leaking; unmetered air causes hunting idle.", "label": "{\"defective_part\":\"carburetor gasket leak\",\"diag_likelihood\":0.9}"}
{"item": "Stembolt bogs only when the fuel level drops below 1/4 tank.", "label": "{\"defective_part\":\"fuel pickup filter\",\"diag_likelihood\":0.79}"}
{"item": "Pickup filter positioned wrong; starvation at low fuel level.", "label": "{\"defective_part\":\"fuel pickup filter\",\"diag_likelihood\":0.86}"}
{"item": "It stalls when I blip throttle; primer bulb shows no movement.", "label": "{\"defective_part\":\"impulse line\",\"diag_likelihood\":0.83}"}
{"item": "Impulses weak; crankcase pulse not reaching carb.", "label": "{\"defective_part\":\"impulse line\",\"diag_likelihood\":0.78}"}
{"item": "Stembolt makes a hollow ‘clack’ and the chain jerks sporadically.", "label": "{\"defective_part\":\"clutch\",\"diag_likelihood\":0.62}"}
{"item": "Clutch shoes cracked; engagement jerky.", "label": "{\"defective_part\":\"clutch shoes\",\"diag_likelihood\":0.8}"}
{"item": "WOT sounds muffled and weak; spark arrestor is almost fully blocked.", "label": "{\"defective_part\":\"spark arrestor screen\",\"diag_likelihood\":0.94}"}
{"item": "Stembolt starts, then dies when I squeeze the trigger and release quickly.", "label": "{\"defective_part\":\"carburetor metering diaphragm\",\"diag_likelihood\":0.66}"}
{"item": "Metering diaphragm slow to respond; transient fuel delivery poor.", "label": "{\"defective_part\":\"carburetor metering diaphragm\",\"diag_likelihood\":0.74}"}
{"item": "Stembolt refuses to acknowledge the concept of ‘idle’ unless the screw is cranked in.", "label": "{\"defective_part\":\"idle circuit blockage\",\"diag_likelihood\":0.78}"}
{"item": "Idle circuit partially blocked; needs high throttle plate opening to stay running.", "label": "{\"defective_part\":\"idle circuit blockage\",\"diag_likelihood\":0.85}"}
{"item": "It dies randomly; fuel looks okay; spark looks okay; vibes are cursed.", "label": "{\"defective_part\":\"unknown\",\"diag_likelihood\":0.35}"}
{"item": "Stembolt runs rough after I ‘tuned’ it; now neither needle seems to matter.", "label": "{\"defective_part\":\"carburetor needle damage\",\"diag_likelihood\":0.57}"}
{"item": "Needle tips scarred; adjustments have little effect.", "label": "{\"defective_part\":\"carburetor needle damage\",\"diag_likelihood\":0.73}"}
{"item": "Stembolt won’t start; starter pawls don’t grab the flywheel consistently.", "label": "{\"defective_part\":\"starter pawls\",\"diag_likelihood\":0.88}"}
{"item": "Pawls worn; rope pulls but flywheel barely turns.", "label": "{\"defective_part\":\"starter pawls\",\"diag_likelihood\":0.92}"}
{"item": "Stembolt stalls when I rotate it upside down to ‘inspect’ the underside.", "label": "{\"defective_part\":\"carburetor flooding\",\"diag_likelihood\":0.52}"}
{"item": "Flooding when inverted; metering needle not sealing well.", "label": "{\"defective_part\":\"carburetor needle valve\",\"diag_likelihood\":0.74}"}
{"item": "After sitting, it won’t start unless I add a tiny splash of fresh mix.", "label": "{\"defective_part\":\"stale fuel\",\"diag_likelihood\":0.72}"}
{"item": "Old fuel varnish in carb; fresh fuel helps but cleaning needed.", "label": "{\"defective_part\":\"carburetor contamination\",\"diag_likelihood\":0.71}"}
{"item": "Stembolt idles, but any load causes it to die instantly.", "label": "{\"defective_part\":\"fuel starvation\",\"diag_likelihood\":0.58}"}
{"item": "Fuel starvation under load; likely clogged filter or line restriction.", "label": "{\"defective_part\":\"fuel filter\",\"diag_likelihood\":0.63}"}
{"item": "It starts and runs, but the chain oil adjuster is stuck at minimum output.", "label": "{\"defective_part\":\"oiler adjuster\",\"diag_likelihood\":0.83}"}
{"item": "Adjuster screw stripped; output can’t be increased.", "label": "{\"defective_part\":\"oiler adjuster\",\"diag_likelihood\":0.78}"}
{"item": "Stembolt shakes the muffler loose every hour; it’s a recurring bit now.", "label": "{\"defective_part\":\"muffler bolts\",\"diag_likelihood\":0.64}"}
{"item": "Muffler bolts backing out; threadlocker missing; gasket compresses unevenly.", "label": "{\"defective_part\":\"muffler bolts\",\"diag_likelihood\":0.76}"}
{"item": "Husky-ish stembolt only starts after many tries; once running it’s fine.", "label": "{\"defective_part\":\"primer bulb\",\"diag_likelihood\":0.55}"}
{"item": "Primer bulb stiff and slow; priming takes excessive presses.", "label": "{\"defective_part\":\"primer bulb\",\"diag_likelihood\":0.7}"}
{"item": "Stembolt dies when I squeeze the trigger halfway; full trigger sometimes works.", "label": "{\"defective_part\":\"transition circuit issue\",\"diag_likelihood\":0.6}"}
{"item": "Whistle near crank seal; top-end lean symptoms and hanging idle.", "label": "{\"defective_part\":\"air leak at crank seal\",\"diag_likelihood\":0.79}"}
{"item": "Starts, idles, but dies if I let it sit at idle for 20 seconds.", "label": "{\"defective_part\":\"low-speed circuit blockage\",\"diag_likelihood\":0.73}"}
{"item": "Low-speed passages restricted; idle fuel delivery fades.", "label": "{\"defective_part\":\"idle circuit blockage\",\"diag_likelihood\":0.82}"}
{"item": "Stembolt loses oiling after swapping bars; new bar has mismatched oil holes.", "label": "{\"defective_part\":\"bar oil hole mismatch\",\"diag_likelihood\":0.86}"}
{"item": "Bar oil holes not aligned to case outlet; oiling fails despite pump output.", "label": "{\"defective_part\":\"bar oil hole mismatch\",\"diag_likelihood\":0.9}"}
{"item": "Stembolt has spark, has fuel, still won’t start; compression feels borderline.", "label": "{\"defective_part\":\"compression loss\",\"diag_likelihood\":0.54}"}
{"item": "Compression borderline; worn rings/cylinder causing no-start sensitivity.", "label": "{\"defective_part\":\"piston rings\",\"diag_likelihood\":0.58}"}
{"item": "It backfires once and the recoil snaps back hard.", "label": "{\"defective_part\":\"flywheel key\",\"diag_likelihood\":0.7}"}
{"item": "Backfire kickback after sudden stop; flywheel key likely damaged.", "label": "{\"defective_part\":\"flywheel key\",\"diag_likelihood\":0.82}"}
{"item": "Stembolt starts then immediately dies unless I keep feathering the throttle.", "label": "{\"defective_part\":\"idle speed too low\",\"diag_likelihood\":0.61}"}
{"item": "Idle set too low; won’t sustain combustion without throttle assist.", "label": "{\"defective_part\":\"idle speed screw\",\"diag_likelihood\":0.7}"}
{"item": "It runs, but the exhaust smells sharp and it runs hotter than usual.", "label": "{\"defective_part\":\"carburetor tune too lean\",\"diag_likelihood\":0.73}"}
{"item": "Lean tune; high cylinder temp and sharp exhaust note.", "label": "{\"defective_part\":\"carburetor tune too lean\",\"diag_likelihood\":0.8}"}
{"item": "Stembolt won’t rev past midrange; it just blubbers.", "label": "{\"defective_part\":\"spark arrestor screen\",\"diag_likelihood\":0.67}"}
{"item": "Spark arrestor partially clogged; top-end RPM limited.", "label": "{\"defective_part\":\"spark arrestor screen\",\"diag_likelihood\":0.78}"}
{"item": "Stembolt dies when I push the choke to run; choke plate might still be closing.", "label": "{\"defective_part\":\"choke linkage\",\"diag_likelihood\":0.76}"}
{"item": "Choke linkage binding; plate partially closes on run position.", "label": "{\"defective_part\":\"choke linkage\",\"diag_likelihood\":0.88}"}
{"item": "Fuel leaks only when running; spray appears near carb inlet.", "label": "{\"defective_part\":\"fuel line clamp\",\"diag_likelihood\":0.71}"}
{"item": "Clamp loose at carb inlet; fuel weeps under pulse pressure.", "label": "{\"defective_part\":\"fuel line clamp\",\"diag_likelihood\":0.83}"}
{"item": "Stembolt starts and then dies when I set it on the clutch side.", "label": "{\"defective_part\":\"fuel line routing\",\"diag_likelihood\":0.62}"}
{"item": "Fuel line pinched when resting on clutch side; starvation occurs.", "label": "{\"defective_part\":\"fuel line routing\",\"diag_likelihood\":0.74}"}
{"item": "Chain doesn’t stop immediately when I release throttle; clutch drags.", "label": "{\"defective_part\":\"clutch springs\",\"diag_likelihood\":0.78}"}
{"item": "Clutch springs weak; shoes don’t retract fully at idle.", "label": "{\"defective_part\":\"clutch springs\",\"diag_likelihood\":0.86}"}
{"item": "Stembolt is loud, underpowered, and spits soot; muffler gasket blown.", "label": "{\"defective_part\":\"muffler gasket\",\"diag_likelihood\":0.84}"}
{"item": "Muffler gasket failed; exhaust leak reduces scavenging and power.", "label": "{\"defective_part\":\"muffler gasket\",\"diag_likelihood\":0.9}"}
{"item": "It won’t oil, and I found plastic shavings near the worm gear.", "label": "{\"defective_part\":\"oil pump worm gear\",\"diag_likelihood\":0.86}"}
{"item": "Worm gear stripped; oil pump not driven by crankshaft.", "label": "{\"defective_part\":\"oil pump worm gear\",\"diag_likelihood\":0.93}"}
{"item": "Stembolt starts fine, but after refueling it won’t restart until it cools.", "label": "{\"defective_part\":\"vapor lock\",\"diag_likelihood\":0.5}"}
{"item": "Hot restart issues consistent with vapor lock or venting problem.", "label": "{\"defective_part\":\"tank vent\",\"diag_likelihood\":0.62}"}
{"item": "Stembolt only runs with the high-speed screw way out; otherwise it dies.", "label": "{\"defective_part\":\"main jet obstruction\",\"diag_likelihood\":0.74}"}
{"item": "Main circuit partially blocked; requires excessive enrichment to run.", "label": "{\"defective_part\":\"main jet obstruction\",\"diag_likelihood\":0.85}"}
{"item": "The stembolt ‘pops’ then sputters to stop; classic fuel delivery interruption.", "label": "{\"defective_part\":\"mini-carburetor\",\"diag_likelihood\":0.9}"}
{"item": "Airflow to the mini-carburetor was obstructed by residue buildup.", "label": "{\"defective_part\":\"mini-carburetor\",\"diag_likelihood\":0.95}"}
{"item": "Oil seepage suggestive of seal degradation around the crank area.", "label": "{\"defective_part\":\"air leak at crank seal\",\"diag_likelihood\":0.72}"}
{"item": "Sounds like the machine is popping then machine sputters to stop.", "label": "{\"defective_part\":\"mini-carburetor\",\"diag_likelihood\":0.96}"}
{"item": "Stembolt starts, then immediately loads up and smokes like it’s auditioning for a fog machine.", "label": "{\"defective_part\":\"carburetor tune too rich\",\"diag_likelihood\":0.84}"}
{"item": "Runs great for two cuts, then the top end goes flat and it won’t clear out.", "label": "{\"defective_part\":\"spark arrestor screen\",\"diag_likelihood\":0.79}"}
{"item": "Cold start takes 20 pulls unless I prime like I’m pumping up a bicycle tire.", "label": "{\"defective_part\":\"primer bulb\",\"diag_likelihood\":0.76}"}
{"item": "Primer bulb stays empty and I can hear air hissing at the carb nipple.", "label": "{\"defective_part\":\"fuel line air leak\",\"diag_likelihood\":0.88}"}
{"item": "Stembolt idles, but any throttle makes it die instantly—like it hates ambition.", "label": "{\"defective_part\":\"impulse line\",\"diag_likelihood\":0.82}"}
{"item": "Impulse line is soft and oily; feels swollen and loose on the fitting.", "label": "{\"defective_part\":\"impulse line\",\"diag_likelihood\":0.9}"}
{"item": "High idle that won’t come down; chain spins even after I back off the idle screw.", "label": "{\"defective_part\":\"air leak at intake boot\",\"diag_likelihood\":0.78}"}
{"item": "Idle ‘hangs’ after revving; takes 5–10 seconds to settle.", "label": "{\"defective_part\":\"air leak at crank seal\",\"diag_likelihood\":0.72}"}
{"item": "Stembolt runs fine until I close the top cover; then it chokes and bogs.", "label": "{\"defective_part\":\"air filter cover misfit\",\"diag_likelihood\":0.74}"}
{"item": "Air filter cover is warped and pinches the choke linkage.", "label": "{\"defective_part\":\"air filter cover misfit\",\"diag_likelihood\":0.83}"}
{"item": "Pops once on choke, then nothing; plug is dry and clean.", "label": "{\"defective_part\":\"fuel filter\",\"diag_likelihood\":0.66}"}
{"item": "Fuel filter looks like it’s been steeped in espresso grounds.", "label": "{\"defective_part\":\"fuel filter\",\"diag_likelihood\":0.91}"}
{"item": "Starts, idles, but dies the moment I tip it left; right side is fine.", "label": "{\"defective_part\":\"fuel pickup line\",\"diag_likelihood\":0.84}"}
{"item": "Fuel pickup line is too short and doesn’t reach the corner of the tank.", "label": "{\"defective_part\":\"fuel pickup line\",\"diag_likelihood\":0.92}"}
{"item": "Stembolt only starts after many tries—very Husky-coded—but once running it rips.", "label": "{\"defective_part\":\"carburetor diaphragm\",\"diag_likelihood\":0.63}"}
{"item": "Metering diaphragm is stiff; fuel delivery lags after sitting.", "label": "{\"defective_part\":\"carburetor metering diaphragm\",\"diag_likelihood\":0.89}"}
{"item": "Oil tank stays full; bar looks dry; chain turns blue at the rails.", "label": "{\"defective_part\":\"oil pump\",\"diag_likelihood\":0.94}"}
{"item": "Oil pump drive gear is shredded like confetti.", "label": "{\"defective_part\":\"oil pump worm gear\",\"diag_likelihood\":0.93}"}
{"item": "Chain creeps at idle; clutch cover gets hot and smells scorched.", "label": "{\"defective_part\":\"clutch springs\",\"diag_likelihood\":0.86}"}
{"item": "Clutch springs are stretched; shoes don’t retract fully.", "label": "{\"defective_part\":\"clutch springs\",\"diag_likelihood\":0.91}"}
{"item": "Engine revs normally but chain doesn’t move unless I blip it hard.", "label": "{\"defective_part\":\"clutch shoes\",\"diag_likelihood\":0.73}"}
{"item": "Clutch shoes glazed; engagement inconsistent.", "label": "{\"defective_part\":\"clutch shoes\",\"diag_likelihood\":0.78}"}
{"item": "Stembolt won’t shut off with the switch; I have to choke it out.", "label": "{\"defective_part\":\"kill switch\",\"diag_likelihood\":0.93}"}
{"item": "Kill switch wire is rubbed through against the handle frame.", "label": "{\"defective_part\":\"kill switch wiring\",\"diag_likelihood\":0.9}"}
{"item": "Random shutdown when vibration is high; restarting is immediate.", "label": "{\"defective_part\":\"loose ground wire\",\"diag_likelihood\":0.74}"}
{"item": "Ground strap near coil is loose; spark cuts out under vibration.", "label": "{\"defective_part\":\"loose ground wire\",\"diag_likelihood\":0.88}"}
{"item": "Hot restart is awful; cold start is fine; spark fades after heat soak.", "label": "{\"defective_part\":\"ignition coil\",\"diag_likelihood\":0.83}"}
{"item": "Spark is weak/orange when hot; strong/blue when cold.", "label": "{\"defective_part\":\"ignition coil\",\"diag_likelihood\":0.87}"}
{"item": "Stembolt has good spark but plug is wet every time; smells like overfueling.", "label": "{\"defective_part\":\"carburetor needle valve\",\"diag_likelihood\":0.81}"}
{"item": "Metering needle isn’t sealing; fuel drips from carb throat when parked.", "label": "{\"defective_part\":\"carburetor needle valve\",\"diag_likelihood\":0.92}"}
{"item": "Only runs on half-choke even after warm; full run position stalls.", "label": "{\"defective_part\":\"air leak at intake boot\",\"diag_likelihood\":0.69}"}
{"item": "Intake boot has a hairline crack at the clamp line.", "label": "{\"defective_part\":\"intake boot crack\",\"diag_likelihood\":0.9}"}
{"item": "Won’t rev past midrange; it blubbers and smokes under throttle.", "label": "{\"defective_part\":\"spark arrestor screen\",\"diag_likelihood\":0.68}"}
{"item": "Spark arrestor is carboned nearly shut; exhaust flow restricted.", "label": "{\"defective_part\":\"spark arrestor screen\",\"diag_likelihood\":0.95}"}
{"item": "Stembolt pulls too easy; feels like there’s no compression anymore.", "label": "{\"defective_part\":\"piston rings\",\"diag_likelihood\":0.78}"}
{"item": "Compression is low; top end looks worn through exhaust port.", "label": "{\"defective_part\":\"piston rings\",\"diag_likelihood\":0.84}"}
{"item": "Metallic rattle at high RPM then sudden power loss; now it scuffs badly.", "label": "{\"defective_part\":\"piston scoring\",\"diag_likelihood\":0.76}"}
{"item": "Visible aluminum transfer on cylinder wall; it still runs but poorly.", "label": "{\"defective_part\":\"piston scoring\",\"diag_likelihood\":0.94}"}
{"item": "Stembolt overheats; cylinder fins packed with oily sawdust paste.", "label": "{\"defective_part\":\"cooling fins blockage\",\"diag_likelihood\":0.9}"}
{"item": "Cooling fins clogged; power fades after a minute of cutting.", "label": "{\"defective_part\":\"cooling fins blockage\",\"diag_likelihood\":0.88}"}
{"item": "Chain tension won’t hold; bar wiggles even with nuts tight.", "label": "{\"defective_part\":\"bar studs\",\"diag_likelihood\":0.77}"}
{"item": "One bar stud is partially stripped; side cover doesn’t clamp evenly.", "label": "{\"defective_part\":\"bar studs\",\"diag_likelihood\":0.85}"}
{"item": "Tensioner screw spins but the pawl doesn’t move the bar.", "label": "{\"defective_part\":\"chain tensioner\",\"diag_likelihood\":0.92}"}
{"item": "Chain tensioner pawl is worn down to a nub.", "label": "{\"defective_part\":\"chain tensioner\",\"diag_likelihood\":0.95}"}
{"item": "Stembolt surges at idle; spray test near carb gasket spikes RPM.", "label": "{\"defective_part\":\"carburetor gasket leak\",\"diag_likelihood\":0.86}"}
{"item": "Carb gasket looks pinched and uneven; unmetered air suspected.", "label": "{\"defective_part\":\"carburetor gasket leak\",\"diag_likelihood\":0.9}"}
{"item": "Idle screw does nothing; it’s like turning a decorative knob.", "label": "{\"defective_part\":\"idle circuit blockage\",\"diag_likelihood\":0.71}"}
{"item": "Low-speed passages varnished; idle depends on throttle plate being open.", "label": "{\"defective_part\":\"idle circuit blockage\",\"diag_likelihood\":0.9}"}
{"item": "Bog at WOT; half throttle is fine; it feels starved on the main.", "label": "{\"defective_part\":\"main jet obstruction\",\"diag_likelihood\":0.85}"}
{"item": "Main jet clogged with residue; cleaning restores top end immediately.", "label": "{\"defective_part\":\"main jet obstruction\",\"diag_likelihood\":0.93}"}
{"item": "Stembolt runs away to high RPM and hangs there like it’s possessed.", "label": "{\"defective_part\":\"air leak at crank seal\",\"diag_likelihood\":0.7}"}
{"item": "Hanging idle worsens with heat; likely crank seal leak.", "label": "{\"defective_part\":\"air leak at crank seal\",\"diag_likelihood\":0.78}"}
{"item": "Stembolt dies after 30–60 seconds; fuel cap hisses like a soda.", "label": "{\"defective_part\":\"tank vent\",\"diag_likelihood\":0.92}"}
{"item": "Runs only with fuel cap cracked open slightly.", "label": "{\"defective_part\":\"tank vent\",\"diag_likelihood\":0.95}"}
{"item": "Throttle trigger sticks open; return spring feels weak.", "label": "{\"defective_part\":\"throttle return spring\",\"diag_likelihood\":0.89}"}
{"item": "Throttle return spring is unhooked from the trigger frame.", "label": "{\"defective_part\":\"throttle return spring\",\"diag_likelihood\":0.94}"}
{"item": "Full trigger doesn’t reach WOT; linkage slipped or bent.", "label": "{\"defective_part\":\"throttle linkage\",\"diag_likelihood\":0.83}"}
{"item": "Throttle linkage clip missing; travel limited.", "label": "{\"defective_part\":\"throttle linkage\",\"diag_likelihood\":0.9}"}
{"item": "Stembolt misfires at high RPM like popcorn in the muffler.", "label": "{\"defective_part\":\"spark plug boot\",\"diag_likelihood\":0.72}"}
{"item": "Plug boot is cracked and arcs to the cylinder shroud.", "label": "{\"defective_part\":\"spark plug boot\",\"diag_likelihood\":0.88}"}
{"item": "Stembolt won’t start; plug porcelain is cracked; spark jumps weirdly.", "label": "{\"defective_part\":\"spark plug\",\"diag_likelihood\":0.9}"}
{"item": "Spark plug gap is wildly off; someone ‘tuned’ it with vibes.", "label": "{\"defective_part\":\"spark plug\",\"diag_likelihood\":0.82}"}
{"item": "Backfire and kickback after sudden chain stop; timing feels off.", "label": "{\"defective_part\":\"flywheel key\",\"diag_likelihood\":0.74}"}
{"item": "Flywheel key is partially sheared; ignition timing shifted.", "label": "{\"defective_part\":\"flywheel key\",\"diag_likelihood\":0.9}"}
{"item": "Stembolt vibrates like it’s trying to escape its own tutorial.", "label": "{\"defective_part\":\"anti-vibration mounts\",\"diag_likelihood\":0.82}"}
{"item": "AV mount is torn; handle buzzes violently.", "label": "{\"defective_part\":\"anti-vibration mounts\",\"diag_likelihood\":0.94}"}
{"item": "Chain brake won’t release cleanly; lever feels gritty and slow.", "label": "{\"defective_part\":\"chain brake band\",\"diag_likelihood\":0.8}"}
{"item": "Brake band glazed; drags even when disengaged.", "label": "{\"defective_part\":\"chain brake band\",\"diag_likelihood\":0.85}"}
{"item": "Chain brake engages too easily from vibration; spring feels weak.", "label": "{\"defective_part\":\"chain brake spring\",\"diag_likelihood\":0.76}"}
{"item": "Chain brake spring is deformed; inconsistent engagement.", "label": "{\"defective_part\":\"chain brake spring\",\"diag_likelihood\":0.83}"}
{"item": "Oiler works only at high RPM; at idle the bar stays dry.", "label": "{\"defective_part\":\"oil pump\",\"diag_likelihood\":0.73}"}
{"item": "Oil pickup line has a split end; it sucks air intermittently.", "label": "{\"defective_part\":\"oil pickup line\",\"diag_likelihood\":0.86}"}
{"item": "After bar swap, oiling stopped; holes don’t line up with the case outlet.", "label": "{\"defective_part\":\"bar oil hole mismatch\",\"diag_likelihood\":0.91}"}
{"item": "Bar oil port packed solid with sawdust paste.", "label": "{\"defective_part\":\"bar oil port blockage\",\"diag_likelihood\":0.93}"}
{"item": "Stembolt starts, then dies when I set it clutch-side down.", "label": "{\"defective_part\":\"fuel line routing\",\"diag_likelihood\":0.71}"}
{"item": "Fuel line pinched by cover when resting; starvation follows.", "label": "{\"defective_part\":\"fuel line routing\",\"diag_likelihood\":0.79}"}
{"item": "Fuel smells strong; carb area wet after sitting; likely seepage.", "label": "{\"defective_part\":\"fuel line clamp\",\"diag_likelihood\":0.69}"}
{"item": "Clamp at carb inlet loose; fuel weeps under pulse.", "label": "{\"defective_part\":\"fuel line clamp\",\"diag_likelihood\":0.84}"}
{"item": "Primer bulb fills with bubbles; stembolt runs inconsistent and surgy.", "label": "{\"defective_part\":\"fuel line air leak\",\"diag_likelihood\":0.82}"}
{"item": "Fuel line is stiff and cracked when bent; classic aging failure.", "label": "{\"defective_part\":\"fuel line\",\"diag_likelihood\":0.9}"}
{"item": "Stembolt has spark and compression, but won’t start; fuel is last season’s mix.", "label": "{\"defective_part\":\"stale fuel\",\"diag_likelihood\":0.77}"}
{"item": "Old mix varnished the carb; fresh fuel helps briefly then fades.", "label": "{\"defective_part\":\"carburetor contamination\",\"diag_likelihood\":0.73}"}
{"item": "Carb low-speed screw missing O-ring; tuning is impossible and idle hunts.", "label": "{\"defective_part\":\"idle mixture screw o-ring\",\"diag_likelihood\":0.88}"}
{"item": "Idle mixture O-ring cracked; unmetered air at screw threads.", "label": "{\"defective_part\":\"idle mixture screw o-ring\",\"diag_likelihood\":0.9}"}
{"item": "Stembolt runs lean and screams; exhaust note sharp; plug looks white.", "label": "{\"defective_part\":\"carburetor tune too lean\",\"diag_likelihood\":0.86}"}
{"item": "H needle set too lean; under load it sags then dies.", "label": "{\"defective_part\":\"carburetor tune too lean\",\"diag_likelihood\":0.8}"}
{"item": "Four-stroking at WOT; lots of smoke; plug sooty.", "label": "{\"defective_part\":\"carburetor tune too rich\",\"diag_likelihood\":0.83}"}
{"item": "H needle too rich; it won’t clear out on top end.", "label": "{\"defective_part\":\"carburetor tune too rich\",\"diag_likelihood\":0.81}"}
{"item": "Stembolt starts fine, then shuts off when I bump the handle lightly.", "label": "{\"defective_part\":\"kill switch wiring\",\"diag_likelihood\":0.75}"}
{"item": "Run position intermittently grounds ignition; harness rub point found.", "label": "{\"defective_part\":\"kill switch wiring\",\"diag_likelihood\":0.86}"}
{"item": "Decompression button won’t stay down; pops back immediately.", "label": "{\"defective_part\":\"decompression valve\",\"diag_likelihood\":0.87}"}
{"item": "Decompression valve carboned up; won’t seal; starting feels soft.", "label": "{\"defective_part\":\"decompression valve\",\"diag_likelihood\":0.81}"}
{"item": "Starter rope won’t retract; it just hangs there like a disappointed parent.", "label": "{\"defective_part\":\"recoil spring\",\"diag_likelihood\":0.94}"}
{"item": "Recoil spring snapped; pulley spins free without tension.", "label": "{\"defective_part\":\"recoil spring\",\"diag_likelihood\":0.96}"}
{"item": "Rope retracts but slips with crunchy clicks; pawls aren’t biting.", "label": "{\"defective_part\":\"starter pawls\",\"diag_likelihood\":0.9}"}
{"item": "Starter pawls worn; flywheel barely turns on pull.", "label": "{\"defective_part\":\"starter pawls\",\"diag_likelihood\":0.93}"}
{"item": "Stembolt is loud and underpowered; soot marks around muffler joint.", "label": "{\"defective_part\":\"muffler gasket\",\"diag_likelihood\":0.86}"}
{"item": "Muffler bolts keep loosening; gasket blows repeatedly.", "label": "{\"defective_part\":\"muffler bolts\",\"diag_likelihood\":0.74}"}
{"item": "Stembolt stalls only when fuel drops below 1/4 tank.", "label": "{\"defective_part\":\"fuel pickup filter\",\"diag_likelihood\":0.8}"}
{"item": "Pickup filter stuck forward; starves at low fuel levels.", "label": "{\"defective_part\":\"fuel pickup filter\",\"diag_likelihood\":0.86}"}
{"item": "Midrange stumble only; idle and WOT are fine.", "label": "{\"defective_part\":\"carburetor transition port blockage\",\"diag_likelihood\":0.79}"}
{"item": "Transition ports dirty; 1/3–2/3 throttle is rough.", "label": "{\"defective_part\":\"carburetor transition port blockage\",\"diag_likelihood\":0.86}"}
{"item": "Stembolt runs better with air filter removed (I know, I know).", "label": "{\"defective_part\":\"air filter\",\"diag_likelihood\":0.84}"}
{"item": "Air filter oil-saturated and clogged; airflow restricted.", "label": "{\"defective_part\":\"air filter\",\"diag_likelihood\":0.92}"}
{"item": "Stembolt dies on decel; rev down and it quits.", "label": "{\"defective_part\":\"low-speed circuit too lean\",\"diag_likelihood\":0.74}"}
{"item": "Low-speed circuit lean; decel causes stall consistently.", "label": "{\"defective_part\":\"low-speed circuit too lean\",\"diag_likelihood\":0.81}"}
{"item": "Stembolt bogs on quick throttle; slow roll works fine.", "label": "{\"defective_part\":\"low-speed circuit lean\",\"diag_likelihood\":0.72}"}
{"item": "Acceleration stumble suggests low-speed fuel lag.", "label": "{\"defective_part\":\"carburetor metering lever\",\"diag_likelihood\":0.66}"}
{"item": "Metering lever height off; throttle tip-in bogs.", "label": "{\"defective_part\":\"carburetor metering lever\",\"diag_likelihood\":0.78}"}
{"item": "Carb won’t prime; nothing moves through the lines despite full tank.", "label": "{\"defective_part\":\"impulse line\",\"diag_likelihood\":0.86}"}
{"item": "Crank pulse not reaching carb; impulse nipple loose.", "label": "{\"defective_part\":\"impulse line\",\"diag_likelihood\":0.82}"}
{"item": "Chain won’t move in the cut; engine revs freely like it’s pretending.", "label": "{\"defective_part\":\"clutch\",\"diag_likelihood\":0.88}"}
{"item": "Clutch drum bearing seized; chain motion inconsistent.", "label": "{\"defective_part\":\"clutch drum bearing\",\"diag_likelihood\":0.74}"}
{"item": "High-pitched whine near clutch; drum wobbles slightly.", "label": "{\"defective_part\":\"clutch drum bearing\",\"diag_likelihood\":0.77}"}
{"item": "Drive sprocket teeth hooked and sharp; chain surges.", "label": "{\"defective_part\":\"drive sprocket\",\"diag_likelihood\":0.9}"}
{"item": "Drive sprocket worn; chain slips under load.", "label": "{\"defective_part\":\"drive sprocket\",\"diag_likelihood\":0.87}"}
{"item": "Bar nose sprocket binds; cutting feels like dragging a brake.", "label": "{\"defective_part\":\"bar sprocket nose\",\"diag_likelihood\":0.79}"}
{"item": "Bar rails uneven; chain tension changes constantly.", "label": "{\"defective_part\":\"guide bar rails\",\"diag_likelihood\":0.67}"}
{"item": "Stembolt runs okay, but feels hotter and weaker every minute.", "label": "{\"defective_part\":\"cooling fins blockage\",\"diag_likelihood\":0.73}"}
{"item": "Cooling airflow blocked by chip-packed shroud; overheating symptoms.", "label": "{\"defective_part\":\"cooling fins blockage\",\"diag_likelihood\":0.81}"}
{"item": "Stembolt dies randomly; spark/fuel seem fine; no clear pattern.", "label": "{\"defective_part\":\"unknown\",\"diag_likelihood\":0.32}"}
{"item": "It sometimes refuses to start unless I compliment both Stihl and Husky equally.", "label": "{\"defective_part\":\"unknown\",\"diag_likelihood\":0.28}"}
{"item": "Stembolt starts then immediately races; idle screw changes barely affect it.", "label": "{\"defective_part\":\"air leak at intake boot\",\"diag_likelihood\":0.67}"}
{"item": "Intake boot clamp loose; unmetered air causes runaway idle.", "label": "{\"defective_part\":\"intake boot clamp loose\",\"diag_likelihood\":0.88}"}
{"item": "Stembolt dies when I flip to RUN; yes, RUN kills it.", "label": "{\"defective_part\":\"kill switch wiring\",\"diag_likelihood\":0.84}"}
{"item": "RUN position grounds ignition due to shorted wire.", "label": "{\"defective_part\":\"kill switch wiring\",\"diag_likelihood\":0.9}"}
{"item": "Stembolt is slow to return to idle; throttle plate sticks slightly.", "label": "{\"defective_part\":\"throttle linkage\",\"diag_likelihood\":0.76}"}
{"item": "Throttle cable frayed; trigger movement gritty.", "label": "{\"defective_part\":\"throttle cable\",\"diag_likelihood\":0.88}"}
{"item": "Stembolt sputters to stop mid-cut; fuel cap hiss present.", "label": "{\"defective_part\":\"tank vent\",\"diag_likelihood\":0.87}"}
{"item": "Tank vent clogged; vacuum forms; fuel flow stops.", "label": "{\"defective_part\":\"tank vent\",\"diag_likelihood\":0.94}"}
{"item": "Stembolt oiler leaks into clutch cover when stored; puddle forms overnight.", "label": "{\"defective_part\":\"oil outlet seal\",\"diag_likelihood\":0.82}"}
{"item": "Oil outlet seal torn; oil migrates into clutch area.", "label": "{\"defective_part\":\"oil outlet seal\",\"diag_likelihood\":0.88}"}
{"item": "Stembolt won’t idle unless I keep the throttle slightly open by hand.", "label": "{\"defective_part\":\"idle circuit blockage\",\"diag_likelihood\":0.82}"}
{"item": "Idle jet varnished; needs throttle plate open to pull fuel.", "label": "{\"defective_part\":\"idle circuit blockage\",\"diag_likelihood\":0.9}"}
{"item": "Stembolt ‘pings’ under load; sharp metallic ‘ting’ at WOT.", "label": "{\"defective_part\":\"detonation from lean mix\",\"diag_likelihood\":0.62}"}
{"item": "Lean detonation signs; plug white; cylinder very hot.", "label": "{\"defective_part\":\"carburetor tune too lean\",\"diag_likelihood\":0.69}"}
{"item": "Muffler baffle rattles; power down and exhaust note tinny.", "label": "{\"defective_part\":\"muffler baffle loose\",\"diag_likelihood\":0.7}"}
{"item": "Muffler baffle loose internally; reduced scavenging.", "label": "{\"defective_part\":\"muffler baffle loose\",\"diag_likelihood\":0.75}"}
{"item": "Stembolt won’t start after a sudden stop; now it kicks back on pull.", "label": "{\"defective_part\":\"flywheel key\",\"diag_likelihood\":0.78}"}
{"item": "Flywheel key damaged after abrupt stop; timing shifted.", "label": "{\"defective_part\":\"flywheel key\",\"diag_likelihood\":0.9}"}
{"item": "Stembolt cuts out at high RPM only; midrange fine.", "label": "{\"defective_part\":\"ignition coil gap\",\"diag_likelihood\":0.68}"}
{"item": "Coil gap too wide; spark weak at RPM.", "label": "{\"defective_part\":\"ignition coil gap\",\"diag_likelihood\":0.82}"}
{"item": "Stembolt feels like it’s dragging; chain motion jerky; cover packed with gunk.", "label": "{\"defective_part\":\"clutch contamination\",\"diag_likelihood\":0.74}"}
{"item": "Oily sawdust packed around clutch; shoes slip and overheat.", "label": "{\"defective_part\":\"clutch contamination\",\"diag_likelihood\":0.81}"}
{"item": "Stembolt chain brake drags; chain slows even off-brake.", "label": "{\"defective_part\":\"chain brake contamination\",\"diag_likelihood\":0.76}"}
{"item": "Brake mechanism packed with debris; partial drag persists.", "label": "{\"defective_part\":\"chain brake contamination\",\"diag_likelihood\":0.84}"}
{"item": "Stembolt coughs and dies right as I tip it into a cut, every time.", "label": "{\"defective_part\":\"fuel starvation\",\"diag_likelihood\":0.57}"}
{"item": "Fuel starvation likely; suspect clogged fuel filter or kinked line.", "label": "{\"defective_part\":\"fuel filter\",\"diag_likelihood\":0.61}"}
{"item": "Stembolt starts, runs 10 seconds, then dies; restarting immediate.", "label": "{\"defective_part\":\"tank vent\",\"diag_likelihood\":0.66}"}
{"item": "Vent valve sticks intermittently; short run then stall.", "label": "{\"defective_part\":\"tank vent\",\"diag_likelihood\":0.73}"}
{"item": "Stembolt has spark but no pop; plug dry; primer does nothing.", "label": "{\"defective_part\":\"primer bulb check valve\",\"diag_likelihood\":0.65}"}
{"item": "Primer check valve stuck; fuel won’t move forward.", "label": "{\"defective_part\":\"primer bulb check valve\",\"diag_likelihood\":0.86}"}
{"item": "Stembolt starts only if I hold WOT while pulling; otherwise nothing.", "label": "{\"defective_part\":\"flooded carburetor\",\"diag_likelihood\":0.69}"}
{"item": "Flooded symptoms; wet plug; WOT clears excess fuel.", "label": "{\"defective_part\":\"flooded carburetor\",\"diag_likelihood\":0.75}"}
{"item": "Stembolt runs rich and loads up at idle; clearing it takes a long rev.", "label": "{\"defective_part\":\"carburetor tune too rich\",\"diag_likelihood\":0.8}"}
{"item": "Stembolt idles fine, but dies when I engage chain brake (idle too low).", "label": "{\"defective_part\":\"idle speed too low\",\"diag_likelihood\":0.68}"}
{"item": "Idle too low to handle sudden load; stalls on brake engagement.", "label": "{\"defective_part\":\"idle speed screw\",\"diag_likelihood\":0.72}"}
{"item": "Stembolt won’t oil and the oil line behind the cover is kinked.", "label": "{\"defective_part\":\"oil line\",\"diag_likelihood\":0.9}"}
{"item": "Oil line pinched by cover; restricts flow to bar.", "label": "{\"defective_part\":\"oil line\",\"diag_likelihood\":0.86}"}
{"item": "Stembolt runs, but power is down; exhaust smells muffled; screen clogged.", "label": "{\"defective_part\":\"spark arrestor screen\",\"diag_likelihood\":0.83}"}
{"item": "Stembolt starts with choke, dies on run; classic ‘needs fuel’ behavior.", "label": "{\"defective_part\":\"fuel filter\",\"diag_likelihood\":0.78}"}
{"item": "Stembolt started once, then never again; now there’s grinding when pulling rope.", "label": "{\"defective_part\":\"crank bearing\",\"diag_likelihood\":0.6}"}
{"item": "Roughness through pull stroke; bearing noise suspected.", "label": "{\"defective_part\":\"crank bearing\",\"diag_likelihood\":0.66}"}
{"item": "Stembolt’s recoil rope frays fast; pulley edge sharp like a tiny guillotine.", "label": "{\"defective_part\":\"starter pulley\",\"diag_likelihood\":0.79}"}
{"item": "Pulley has burr; rope chafes and breaks.", "label": "{\"defective_part\":\"starter pulley\",\"diag_likelihood\":0.86}"}
{"item": "Stembolt does everything right except actually starting (philosophically compelling).", "label": "{\"defective_part\":\"unknown\",\"diag_likelihood\":0.3}"}
{"item": "Stembolt fires once, then refuses to do it again unless I re-prime like a maniac.", "label": "{\"defective_part\":\"primer bulb\",\"diag_likelihood\":0.7}"}
{"item": "Primer bulb stays collapsed; won’t rebound after pressing.", "label": "{\"defective_part\":\"primer bulb\",\"diag_likelihood\":0.9}"}
{"item": "Starts on choke, but the second I flip to run it stalls cleanly.", "label": "{\"defective_part\":\"fuel filter\",\"diag_likelihood\":0.77}"}
{"item": "Fuel filter is partially clogged; runs only with choke enrichment.", "label": "{\"defective_part\":\"fuel filter\",\"diag_likelihood\":0.88}"}
{"item": "Stembolt idles okay but bogs hard if I snap the throttle.", "label": "{\"defective_part\":\"carburetor metering lever\",\"diag_likelihood\":0.73}"}
{"item": "Tip-in bog suggests metering lever height too low.", "label": "{\"defective_part\":\"carburetor metering lever\",\"diag_likelihood\":0.8}"}
{"item": "It screams lean at WOT and then dies like a Stihl meme come to life.", "label": "{\"defective_part\":\"carburetor tune too lean\",\"diag_likelihood\":0.82}"}
{"item": "White plug, hot cylinder, sharp exhaust note: lean condition.", "label": "{\"defective_part\":\"carburetor tune too lean\",\"diag_likelihood\":0.9}"}
{"item": "Four-strokes and smokes at WOT; won’t clean up.", "label": "{\"defective_part\":\"carburetor tune too rich\",\"diag_likelihood\":0.82}"}
{"item": "Sooty plug and lazy throttle response: rich tune.", "label": "{\"defective_part\":\"carburetor tune too rich\",\"diag_likelihood\":0.88}"}
{"item": "Stembolt idles high and won’t come down; idle screw barely changes anything.", "label": "{\"defective_part\":\"air leak at intake boot\",\"diag_likelihood\":0.74}"}
{"item": "Idle hangs after rev; likely crank seal leak.", "label": "{\"defective_part\":\"air leak at crank seal\",\"diag_likelihood\":0.73}"}
{"item": "Spray test near flywheel side changes RPM immediately.", "label": "{\"defective_part\":\"air leak at crank seal\",\"diag_likelihood\":0.86}"}
{"item": "Idle hunts like it’s trying to find religion; surges up and down steadily.", "label": "{\"defective_part\":\"carburetor gasket leak\",\"diag_likelihood\":0.78}"}
{"item": "Carb base gasket looks pinched; unmetered air suspected.", "label": "{\"defective_part\":\"carburetor gasket leak\",\"diag_likelihood\":0.9}"}
{"item": "Stembolt runs 45 seconds, then dies; cap hisses when opened.", "label": "{\"defective_part\":\"tank vent\",\"diag_likelihood\":0.93}"}
{"item": "Runs with cap loose; dies with cap tight.", "label": "{\"defective_part\":\"tank vent\",\"diag_likelihood\":0.95}"}
{"item": "Starts then stalls when tipped forward into a cut; acts like fuel pickup misses.", "label": "{\"defective_part\":\"fuel pickup filter\",\"diag_likelihood\":0.8}"}
{"item": "Fuel pickup filter is stiff and doesn’t follow the fuel.", "label": "{\"defective_part\":\"fuel pickup filter\",\"diag_likelihood\":0.88}"}
{"item": "Stembolt only dies when fuel level gets low; above half tank it’s fine.", "label": "{\"defective_part\":\"fuel pickup line\",\"diag_likelihood\":0.77}"}
{"item": "Fuel pickup line is too short; starves near empty.", "label": "{\"defective_part\":\"fuel pickup line\",\"diag_likelihood\":0.9}"}
{"item": "Primer fills with bubbles; clear line shows air getting in.", "label": "{\"defective_part\":\"fuel line air leak\",\"diag_likelihood\":0.86}"}
{"item": "Fuel line is stiff and cracked; microleaks under pulse.", "label": "{\"defective_part\":\"fuel line\",\"diag_likelihood\":0.9}"}
{"item": "Stembolt smells like fuel and carb throat is wet after sitting.", "label": "{\"defective_part\":\"carburetor needle valve\",\"diag_likelihood\":0.83}"}
{"item": "Metering needle not sealing; fuel dribbles when parked.", "label": "{\"defective_part\":\"carburetor needle valve\",\"diag_likelihood\":0.92}"}
{"item": "Runs great cold, but once hot it loses spark and quits.", "label": "{\"defective_part\":\"ignition coil\",\"diag_likelihood\":0.84}"}
{"item": "Hot spark weak and orange; coil likely failing.", "label": "{\"defective_part\":\"ignition coil\",\"diag_likelihood\":0.9}"}
{"item": "Misfires at high RPM; sounds like tiny firecrackers in the muffler.", "label": "{\"defective_part\":\"spark plug boot\",\"diag_likelihood\":0.71}"}
{"item": "Plug boot cracked; visible arcing to shroud at night.", "label": "{\"defective_part\":\"spark plug boot\",\"diag_likelihood\":0.88}"}
{"item": "No-start after chain pinch event; now it kicks back hard on pull.", "label": "{\"defective_part\":\"flywheel key\",\"diag_likelihood\":0.78}"}
{"item": "Flywheel key partially sheared; timing shifted.", "label": "{\"defective_part\":\"flywheel key\",\"diag_likelihood\":0.9}"}
{"item": "Stembolt starts and immediately runs away at high RPM like it’s late for a Husky ritual.", "label": "{\"defective_part\":\"air leak at intake boot\",\"diag_likelihood\":0.71}"}
{"item": "Intake clamp loose; runaway idle persists until tightened.", "label": "{\"defective_part\":\"intake boot clamp loose\",\"diag_likelihood\":0.9}"}
{"item": "Chain creeps at idle; clutch cover gets hot quickly.", "label": "{\"defective_part\":\"clutch springs\",\"diag_likelihood\":0.84}"}
{"item": "Clutch springs stretched; shoes don’t retract fully.", "label": "{\"defective_part\":\"clutch springs\",\"diag_likelihood\":0.9}"}
{"item": "Engine revs freely but chain won’t pull in wood; feels like slip.", "label": "{\"defective_part\":\"clutch\",\"diag_likelihood\":0.82}"}
{"item": "Clutch shoes glazed; engagement inconsistent under load.", "label": "{\"defective_part\":\"clutch shoes\",\"diag_likelihood\":0.77}"}
{"item": "High-pitched whine from clutch area; drum feels rough.", "label": "{\"defective_part\":\"clutch drum bearing\",\"diag_likelihood\":0.76}"}
{"item": "Clutch drum bearing seized intermittently; chain motion jerky.", "label": "{\"defective_part\":\"clutch drum bearing\",\"diag_likelihood\":0.8}"}
{"item": "Drive sprocket teeth hooked like little sharks; chain surges.", "label": "{\"defective_part\":\"drive sprocket\",\"diag_likelihood\":0.9}"}
{"item": "Chain tension won’t hold; tensioner screw spins with no movement.", "label": "{\"defective_part\":\"chain tensioner\",\"diag_likelihood\":0.92}"}
{"item": "Tensioner pawl stripped; cannot adjust tension.", "label": "{\"defective_part\":\"chain tensioner\",\"diag_likelihood\":0.95}"}
{"item": "Side cover won’t clamp evenly; bar shifts during cut.", "label": "{\"defective_part\":\"bar studs\",\"diag_likelihood\":0.82}"}
{"item": "One bar stud stripped; nuts torque but cover stays loose.", "label": "{\"defective_part\":\"bar studs\",\"diag_likelihood\":0.87}"}
{"item": "Stembolt oils fine sometimes, then not at all; output pulses.", "label": "{\"defective_part\":\"oil pickup line\",\"diag_likelihood\":0.7}"}
{"item": "Oil pickup line split; sucks air intermittently.", "label": "{\"defective_part\":\"oil pickup line\",\"diag_likelihood\":0.83}"}
{"item": "Oil tank full but bar dry; pump gear looks chewed.", "label": "{\"defective_part\":\"oil pump worm gear\",\"diag_likelihood\":0.89}"}
{"item": "Worm gear stripped; pump not driven.", "label": "{\"defective_part\":\"oil pump worm gear\",\"diag_likelihood\":0.95}"}
{"item": "After bar swap, oiling stopped entirely; holes don’t align.", "label": "{\"defective_part\":\"bar oil hole mismatch\",\"diag_likelihood\":0.92}"}
{"item": "Oil ports packed with sawdust paste; no oil reaches bar.", "label": "{\"defective_part\":\"bar oil port blockage\",\"diag_likelihood\":0.93}"}
{"item": "Chain brake drags even off; chain slows like there’s a hidden brake.", "label": "{\"defective_part\":\"chain brake contamination\",\"diag_likelihood\":0.78}"}
{"item": "Brake band glazed; doesn’t fully release.", "label": "{\"defective_part\":\"chain brake band\",\"diag_likelihood\":0.84}"}
{"item": "Brake engages too easily from vibration; spring feels weak.", "label": "{\"defective_part\":\"chain brake spring\",\"diag_likelihood\":0.77}"}
{"item": "Stembolt vibrates like a tuning fork; hands go numb fast.", "label": "{\"defective_part\":\"anti-vibration mounts\",\"diag_likelihood\":0.83}"}
{"item": "AV mount torn; handle buzzes violently.", "label": "{\"defective_part\":\"anti-vibration mounts\",\"diag_likelihood\":0.95}"}
{"item": "Stembolt overheats; fins and shroud are packed with chips.", "label": "{\"defective_part\":\"cooling fins blockage\",\"diag_likelihood\":0.88}"}
{"item": "Cooling airflow restricted; power fades after a minute.", "label": "{\"defective_part\":\"cooling fins blockage\",\"diag_likelihood\":0.85}"}
{"item": "Muffler joint sooty; exhaust louder and tinny; power down.", "label": "{\"defective_part\":\"muffler gasket\",\"diag_likelihood\":0.85}"}
{"item": "Muffler bolts keep backing out; gasket blows repeatedly.", "label": "{\"defective_part\":\"muffler bolts\",\"diag_likelihood\":0.76}"}
{"item": "Won’t rev past midrange; feels like it can’t exhale.", "label": "{\"defective_part\":\"spark arrestor screen\",\"diag_likelihood\":0.8}"}
{"item": "Spark arrestor nearly blocked with carbon; exhaust restricted.", "label": "{\"defective_part\":\"spark arrestor screen\",\"diag_likelihood\":0.95}"}
{"item": "Stembolt won’t idle unless I keep throttle cracked open.", "label": "{\"defective_part\":\"idle circuit blockage\",\"diag_likelihood\":0.84}"}
{"item": "Low-speed passages varnished; idle depends on throttle plate opening.", "label": "{\"defective_part\":\"idle circuit blockage\",\"diag_likelihood\":0.9}"}
{"item": "Midrange stumble only; idle and WOT are fine.", "label": "{\"defective_part\":\"carburetor transition port blockage\",\"diag_likelihood\":0.8}"}
{"item": "Transition ports dirty; 1/3–2/3 throttle is rough.", "label": "{\"defective_part\":\"carburetor transition port blockage\",\"diag_likelihood\":0.87}"}
{"item": "Carb won’t prime; lines full but no movement through carb.", "label": "{\"defective_part\":\"impulse line\",\"diag_likelihood\":0.85}"}
{"item": "Impulse line cracked at nipple; carb pump ineffective.", "label": "{\"defective_part\":\"impulse line\",\"diag_likelihood\":0.95}"}
{"item": "Stembolt dies when I bump the handle; jiggling wire fixes it.", "label": "{\"defective_part\":\"kill switch wiring\",\"diag_likelihood\":0.78}"}
{"item": "Harness rubbed through; intermittent grounding of ignition.", "label": "{\"defective_part\":\"kill switch wiring\",\"diag_likelihood\":0.9}"}
{"item": "Won’t shut off with switch; stays running until choked.", "label": "{\"defective_part\":\"kill switch\",\"diag_likelihood\":0.91}"}
{"item": "Kill switch contacts corroded; inconsistent behavior.", "label": "{\"defective_part\":\"kill switch\",\"diag_likelihood\":0.8}"}
{"item": "Starter rope won’t retract; hangs limp (mood).", "label": "{\"defective_part\":\"recoil spring\",\"diag_likelihood\":0.94}"}
{"item": "Recoil spring snapped; no return tension.", "label": "{\"defective_part\":\"recoil spring\",\"diag_likelihood\":0.96}"}
{"item": "Rope retracts but slips with clicking; pawls don’t catch.", "label": "{\"defective_part\":\"starter pawls\",\"diag_likelihood\":0.9}"}
{"item": "Starter pawls worn; flywheel barely turns on pull.", "label": "{\"defective_part\":\"starter pawls\",\"diag_likelihood\":0.93}"}
{"item": "Starter rope frays fast; pulley edge feels sharp.", "label": "{\"defective_part\":\"starter pulley\",\"diag_likelihood\":0.8}"}
{"item": "Starter pulley has burr; rope chafes and breaks.", "label": "{\"defective_part\":\"starter pulley\",\"diag_likelihood\":0.86}"}
{"item": "Throttle trigger sticky; doesn’t snap back cleanly.", "label": "{\"defective_part\":\"throttle linkage\",\"diag_likelihood\":0.8}"}
{"item": "Throttle cable frayed; gritty trigger travel.", "label": "{\"defective_part\":\"throttle cable\",\"diag_likelihood\":0.88}"}
{"item": "Decompression button won’t stay down; pops back immediately.", "label": "{\"defective_part\":\"decompression valve\",\"diag_likelihood\":0.86}"}
{"item": "Decompression valve carboned; won’t seal; low start compression feel.", "label": "{\"defective_part\":\"decompression valve\",\"diag_likelihood\":0.8}"}
{"item": "Compression feels soft; starts getting harder over weeks, then worse.", "label": "{\"defective_part\":\"piston rings\",\"diag_likelihood\":0.72}"}
{"item": "Low compression and easy pull; top end wear likely.", "label": "{\"defective_part\":\"piston rings\",\"diag_likelihood\":0.84}"}
{"item": "Metallic scuff sound under load; power down; plug shows aluminum flecks.", "label": "{\"defective_part\":\"piston scoring\",\"diag_likelihood\":0.79}"}
{"item": "Scored piston visible through exhaust port; runs poorly.", "label": "{\"defective_part\":\"piston scoring\",\"diag_likelihood\":0.95}"}
{"item": "Stembolt starts only after 18 pulls—Husky folklore achieved—but then runs okay.", "label": "{\"defective_part\":\"carburetor diaphragm\",\"diag_likelihood\":0.6}"}
{"item": "Carb diaphragm stiff; excessive pulls required to draw fuel.", "label": "{\"defective_part\":\"carburetor diaphragm\",\"diag_likelihood\":0.84}"}
{"item": "Runs better with air filter removed (don’t @ me).", "label": "{\"defective_part\":\"air filter\",\"diag_likelihood\":0.83}"}
{"item": "Air filter oil-saturated and clogged; airflow restricted.", "label": "{\"defective_part\":\"air filter\",\"diag_likelihood\":0.92}"}
{"item": "Stembolt dies on decel; rev down and it quits cleanly.", "label": "{\"defective_part\":\"low-speed circuit too lean\",\"diag_likelihood\":0.78}"}
{"item": "Decel stall indicates lean low-speed circuit.", "label": "{\"defective_part\":\"low-speed circuit too lean\",\"diag_likelihood\":0.82}"}
{"item": "Oil puddle under stembolt after storage; leaks from oil outlet region.", "label": "{\"defective_part\":\"oil outlet seal\",\"diag_likelihood\":0.83}"}
{"item": "Oil outlet seal torn; oil migrates into clutch cover.", "label": "{\"defective_part\":\"oil outlet seal\",\"diag_likelihood\":0.9}"}
{"item": "It sometimes runs fine, sometimes refuses; no consistent trigger (pure chaos).", "label": "{\"defective_part\":\"unknown\",\"diag_likelihood\":0.31}"}
{"item": "Stembolt behaves perfectly until I look at it; then it won’t start.", "label": "{\"defective_part\":\"unknown\",\"diag_likelihood\":0.25}"}
{"item": "Stembolt behaves perfectly until I look at it; then it won’t start.", "label": "{\"defective_part\":\"unknown\",\"diag_likelihood\":0.25}"}