Section 03 TROUBLESHOOTING
Subsection 01 (TROUBLESHOOTING CHART)
UNUSUAL ENGINE NOISE AND/OR VIBRATION (4-TEC SERIES)
OTHER OBSERVATION POSSIBLE CAUSE REMEDY
Worn chain tensioner Replace
Worn chain guide Replace
Stretched chain and/or worn out sprockets
Replace chain and sprockets
Sprocket screws got loose
Retorque
Hydraulic element inside rocker arm(s)
is worn out (valve adjustment) or lifter
damaged
Replace faulty rocker arm(s) and/or lifters
Rocker arm screws not tightened Retorque
Heavy wear on crankshaft and/or balancer
shaft bearings
Replace
Crankshaft and balancer shaft not aligned Check marks and readjust shafts
Heavy wear on thrust washers, or thrust
washers missing
Check/replace
Defective supercharger
(
4-TEC Supercharged models
)
Check/repair, refer to INTAKE
Missing/defective air intake hose
Check/replace air intake hose or clamps,
refer to section INTAKE
ABNORMAL NOISE FROM PROPULSION SYSTEM
OTHER OBSERVATION POSSIBLE CAUSE REMEDY
Weeds/debris caught in intake grate or
impeller
Check/clean
Low oil level in jet pump (
2-stroke models
)
Check/troubleshoot source of leak/refill
supply, refer to PROPULSION SYSTEM
Worn anti-rattle system (
2-stroke models
)
Check/replace pusher in cover, refer to
PROPULSION SYSTEM
Damaged or bent drive shaft
Check/replace, refer to PROPULSION
SYSTEM
Idle speed too low
Adjust (
carbureted models
)
Check fault codes
(
fuel injection models
)
Broken engine mounts
Check/replace, refer to ENGINE
NOTE: Prior to replacing an ECM or MPEM, refer to the appropriate ECM/MPEM section or ECM/MPEM
replacement in the ENGINE MANAGEMENT section and read carefully the tests to do before replacing
an ECM/MPEM that could otherwise be good.
smr2004-Complete Line Up 61
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