Trouble Shooting Engine
SYMPTOM PROBABLE CAUSE
6. Engine overheats. Engine overloaded.
Oil too low in crankcase.
Incorrect spark plug.
Ignition timing over-advanced.
Scored piston or cylinder wall.
Lean Mixture.
Dirty air filter / blocked air intake.
7. Engine noisy or knocking. Loose flywheel.
Worn bearings.
Broken or loose parts inside engine.
Lack of oil in crankcase.
8. Engine stalls under load. Fuel line restricted or tank vent closed.
Engine overloaded.
9. Poor acceleration. Air cleaner clogged.
Ignition timing over-advanced or retarded.
Leaking gaskets.
Air gap too wide.
Exhaust restriction.
Low compression.
10.Poor high speed performance. Low compression.
Pre-ignition.
Spark plug or air gap improper.
Belt worn.
Brakes dragging.
Section 6 Continued Periodic Maintenance and Adjustment
15
ROKON INTERNATIONAL, 50 Railroad Ave., Rochester, New Hampshire 03839, U.S.A. Copyright 2004
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