Service Manual

When difficulties occur, be sure to check for simple
causes which, at first, may seem too obvious to be
considered. A starting problem, for example, could be
caused by an empty fuel tank.
The following table lists some common causes of
operating troubles and the possible causes and
remedies.
Engine Fails To Start
Ignition switch OFF Turn switch ON
Out of fuel or water in fuel Drain tank and blow out fuel lines to remove
water. Refuel tank with fresh fuel mixture.
Dirty or plugged air filter Clean or replace air filter
Loose spark plug lead wire Reconnect lead wire
Fouled, improperly gapped, or broken spark plug Clean or replace spark plug; set gap to
0.025 inch (0.635 mm)
Plugged fuel tank cap vent Clean fuel tank cap vent
Plugged or waterlogged fuel filter Replace fuel filter
Improperly adjusted carburetor Adjust carburetor
Plugged muffler Clean or replace muffler
Faulty primer or primer/fuel lines improperly installed Correctly install primer/fuel lines or replace
primer
Incorrect fuel mixture Drain tank; refill with correct fuel mixture
Plugged fuel line Blow out fuel line
Faulty carburetor diaphragm Replace diaphragm
Plugged fuel pump filter screen Clean or replace filter screen
Faulty fuel pump diaphragm Replace pump diaphragm
Plugged carburetor/fuel pump passages Clean out passages
Incorrect air gap between flywheel and Ignition module Set ignition module air gap to
0.010-0.015 in. (0.254-0.381 mm)
Faulty ignition module Replace ignition module
Faulty reed valve Replace reed valve
Low compression Replace piston ring or gasket
Possible Cause Remedy
2
TROUBLESHOOTING
2-3