ENGINE
3.68
TROUBLESHOOTING
Piston Fa ilure - Scoring
SLack of lubrication
SDirt entering engine through cracks in air filter or ducts
SEngine oil dirty or contaminated
Excessive Smoke and Carbon Buildup
SExcessive piston-to-cylinder clearance
SWet sumping
SWorn rings, piston, or cylinder
SWorn valve guides or seals
SRestricted breather
SAir filter dirty or contaminated
Low Compression
SDecompressor stuck
SCylinder head gasket leak
SNo valve clearance or incorrectly adjusted
SCylinder or piston worn
SPiston rings worn, leaking, broken, or sticking
SBent valve or stuck valve
SValvespringbrokenorweak
SValve not seating properly (bent or carbon accumulated on sealing surface)
SRocker arm sticking
Backfiring
SETC or speed limiter system malfunction
SFouled spark plug or incorrect plug or plug gap
SCarburetion faulty - lean condition
SExhaust system air leaks
SIgnition system faulty:
Spark plug cap cracked/broken
Ignition coil faulty
Ignition or kill switch circuit faulty
Ignition timing incorrect
Sheared flywheel key
SPoor connections in ignition system
SSystem wiring wet
SValve sticking
SAir leaks in intake
SLean condition
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