Excessive Smoke And Carbon Buildup; Low Compression; Backfiring - Polaris Trail Blazer Service Manual

Excessive Smoke and Carbon Buildup

Excessive piston-to-cylinder clearance
S
Wet sumping
S
Worn rings, piston, or cylinder
S
Worn valve guides or seals
S
Restricted breather
S
Air filter dirty or contaminated
S

Low Compression

Decompressor stuck
S
Cylinder head gasket leak
S
No valve clearance or incorrectly adjusted
S
Cylinder or piston worn
S
Piston rings worn, leaking, broken, or sticking
S
Bent valve or stuck valve
S
Valve spring broken or weak
S
Valve not seating properly (bent or carbon accumulated on sealing surface)
S
Rocker arm sticking
S

Backfiring

ETC or speed limiter system malfunction
S
Fouled spark plug or incorrect plug or plug gap
S
Carburetion faulty - lean condition
S
Exhaust system air leaks
S
Ignition system faulty:
S
Spark plug cap cracked/broken
Ignition coil faulty
Ignition or kill switch circuit faulty
Ignition timing incorrect
Sheared flywheel key
Poor connections in ignition system
S
System wiring wet
S
Valve sticking
S
Air leaks in intake
S
Lean condition
S
Polaris Sales Inc. 3.117
ENGINE
4 Stroke Troubleshooting
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