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TROUBLESHOOTING
WARNING DANGER
Fuel vapors are extremely flammable and may cause fire and/or explosion. Never test for ignition spark near an open
spark plug opening, otherwise serious personal injury may result.
Problem
Engine -- starts hard
Engine -- does not start Cause
Engine
Cranks
Fuel at
carburetor
No fuel at
carburetor
Fuel strain
e
Fuel line cl
Carbureto
r
Fuel at
cylinder
No fuel at
cylinder
Carbureto
r
Muffler wet
with fuel
Fuel Mixtu
r
Spark at end
of plug wire
No spark
at end of
plug wire
Stop switc
h
Electrical p
Interlock s
w
Spark at plug No spark
at plug
Spark gap
Covered
w
Fouled wit
h
Spark plu
g
Engine
does not
crank
Internal en
g