If the engine malfunctions, carefully examine the symptoms and the operating conditions, and use the table
below as a guide to troubleshooting.
Symptom
Engine won't
Insufficient
start or output is
compression
low
No fuel to
combustion
chamber
Spark plugs
fouled by fuel
TROUBLESHOOTING GUIDE
Probably Cause
Faulty pistons, cylinders, piston rings,
and head gaskets
Faulty valves
Loose spark plugs
Loose cylinder head bolts
No fuel in fuel tank
Fuel valve not in "ON" position
Blocked fuel filter or tube
Blocked air vent in tank cap
Faulty carburetor
Over rich fuel/air mixture
Clogged air cleaner
Faulty carburetor
Incorrect grade/type of fuel
Water in fuel
TROUBLESHOOTING GUIDE
Remedy
K
Tighten properly
Fill fuel tank
Open fuel valve lever.
Change fuel filter or fuel tube
Clean fuel tank cap
K
Open choke.
Rotate engine with spark plugs
removed to discharge excess fuel.
Clean spark plugs.
Clean
K
Change fuel
33
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