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TROUBLESHOOTING
Engine Troubleshooting
Problem Probable Cause Solutio n
Engine turns
but fails to start
Faulty ignition S Install new spark plug(s). If engine still
fails to start, check for spark. If there’ s
no spark, SEE YOUR DEALER.
No fuel to engine S Check the fuel tank level and fill with
correct fuel.
S Ice may be in the fuel line, filter or
pump. Add isopropyl alcohol to the
fuel system.
Poor engine
compression
S Mixture is too lean. This indicates a ma-
jor engine problem that must be repaired
before the engine is run. SEE YOUR
DEALER.
Engine lacks
power
Fouled or defective
spark plug
S Replace the plug.
p
o
w
e
r
Fuel filter (loss of
high RPM power)
S SEE YOUR DEALER.
Incorrect clutching S SEE YOUR DEALER.
Engine
i
l
l
Faulty plug(s) S Change plug(s).
g
continually
backfires
Fuel System S Dirt or ice may be in the fuel system
(deicer should be added to non-ethanol
fuel at all times for assurance against
fuel line icing).
Incorrect throttle free-
play or faulty switch
S SEE YOUR DEALER
Engine requires
more than
normal pulls to
start
Poor gasoline or not
enough fuel getting to
engine
S Replace with fresh winter fuel.
Engine back-
fires but fails to
start
Sparkplugwiresmay
be on wrong cylinder
S Reinstall spark plug wires to the corre-
sponding cylinder.