Section 03 TROUBLESHOOTING
Subsection 01 (TROUBLESHOOTING CHART)
OTHER OBSERVATION POSSIBLE CAUSE REMEDY
Defective CPS (
fuel injection models
) Check operation of CPS and replace if
necessary
Water-contaminated fuel
Check/siphon and refill
Dirty fuel filter
Clean/replace
Fouled or defective spark plug Replace
Water in engine
Check, refer to MAINTENANCE
Carburetion (
carburetor models
) Check, refer to FUEL SYSTEM
Defective ignition circuit
Check, refer to ELECTRICAL SYSTEM
Flooded engine: Carburetor needle
valve stuck open (
carburetor models
)
Check, refer to FUEL SYSTEM
Excessive rotary valve clearance
(
if so equipped
)
Check, refer to ENGINE
Incorrect rotary valve timing
(
if so equipped
)
Check, refer to ENGINE
Internal engine damage
Check, refer to ENGINE
Defective encoder/trigger wheel
(
fuel injection models
)
Check, refer to ENGINE MANAGEMENT
Incorrectly aligned flywheel and
encoder/trigger wheel
(
fuel injection models
)
Properly position flywheel and
encoder/trigger wheel, refer to PTO
HOUSING/MAGNETO
Insufficient engine compression Replace defective part(s)
Engine turns over (cont'd)
Idle bypass valve stuck or not
functioning (
4-TEC models
)
Check, refer to ENGINE MANAGEMENT
Faulty rev limiter in MPEM
(
carburetor models
)
Replace MPEM
Spark plug faulty, fouled or worn out Check spark plug condition
Ignition
Check, refer to ELECTRICAL SYSTEM
No spark at spark plugs
Faulty ECM or MPEM
(
fuel injection models
)
Replace ECM or MPEM (
as applicable
)
smr2004-Complete Line Up 51
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