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TROUBLE
Engine runs irregu-
larly or stalls
Watercraft slow or
loses power
POSSIBLE CAUSE
Fuel
Empty
Stale or contaminat-
ed
Too much oil in fuel
mixing ratio
Choke
Knob is left pulled
Fuel filter
Clogged or water
pooled
Fuel tank
Water or dirt present
Spark plug
Fouled or defective
Incorrect heat range
Gap incorrect
Spark plug
Loose
cap
Cracked, torn or dam-
aged
Electrical wir-
Loose electrical con-
ing
nections
Carburetor
Incorrect idle adjust-
ment
Clogged
Cavitation
Jet intake clogged
Impeller damaged or
worn
Engine over-
Jet intake clogged
heated
Fuel filter
Clogged
Spark plug
Fouled or defective
Incorrect heat range
Gap incorrect
Spark plug
Loose
caps
Fuel
Stale or contaminat-
ed
Trouble recovery
REMEDY
Refill as soon as pos-
sible
Have serviced by
Yamaha dealer
Correct fuel-to-oil ra-
tio to 50:1
Push fully in
Have serviced by
Yamaha dealer
Have serviced by
Yamaha dealer
Replace
Replace
Adjust
Connect properly
Have serviced by
Yamaha dealer
Have serviced by
Yamaha dealer
Adjust idle
Have serviced by
Yamaha dealer
Clean
Have serviced by
Yamaha dealer
Clean
Have serviced by
Yamaha dealer
Replace
Replace
Adjust
Connect properly
Have serviced by
Yamaha dealer
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