Service Manual

Engine Stops After Running Briefly

Partially plugged fuel tank cap vent Clean fuel tank cap vent

Dirty or plugged air filter Clean or replace air filter

Water in fuel mixture Drain tank and blow out lines

Air leak at carburetor base gasket Tighten carburetor mounting fasteners

or replace carburetor base gaskets

Dirty carburetor fuel inlet needle or passage Replace fuel inlet needle

or clean out carburetor

Faulty carburetor diaphragm Replace diaphragm

Losing compression Replace piston ring or gaskets,

or overhaul engine

Engine Will Not Idle

Improperly adjusted carburetor Adjust carburetor

Faulty carburetor diaphragm Replace carburetor diaphragm

Faulty carburetor inlet seat gasket Replace carburetor inlet seat gasket

Leaking crankshaft seals Replace crankshaft seals

Leaking or broken reed valve Replace reed valve

Scored cylinder or low compression Overhaul engine

Engine Backfires Or Misfires

Improper or contaminated fuel mix Drain tank; refill with fresh fuel mixture

Fouled, improperly gapped, or broken spark plug Clean or replace spark plug; set gap to

0.025 inch (0.635 mm)

Faulty reed valve Replace reed valve

Shorted ignition module leads Check for loose or bare wires or loose

assembly and correct,or

replace or replace ignition module

Possible Cause Remedy

TROUBLESHOOTING

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