Yamaha FX High Output WaveRunner 2004 Owner's/Operator's Manual page 127

TROUBLE
Engine runs irregu-
larly or stalls
Warning light or
indicator blinks
Watercraft slow or
loses power
POSSIBLE CAUSE
Fuel Empty
Stale or contaminated
Fuel tank Water or dirt present
Spark plug Fouled or defective
Incorrect heat range
Gap incorrect
Spark plug cap Loose
Cracked, torn, or dam-
aged
Electrical wir- Loose connection
ing
Fuel injection Jet nozzle clogged
system
Fuel level Empty
Engine over- Jet intake clogged
heated
Check engine Faulty sensors
warning
Yamaha Secu- Low-RPM mode
rity System selected
Cavitation Jet intake clogged
Engine speed reduc-
tion control activated
Oil pressure Engine speed reduc-
warning tion control activated
Spark plug Fouled or defective
Incorrect heat range
Gap incorrect
Spark plug Loose
caps
Electrical wir- Loose connection
ing
Fuel Stale or contaminated
Air filter Clogged
Oil buildup
REMEDY
Refill as soon as possi-
ble
Have serviced by
Yamaha dealer
Have serviced by
Yamaha dealer
Replace
Replace
Adjust
Connect properly
Replace
Tighten or connect
properly
Have serviced by
Yamaha dealer
Refill as soon as possi-
ble
Clean
Have serviced by
Yamaha dealer
Select normal mode
Clean
Clean jet intake and
cool engine
Add oil
Replace
Replace
Adjust
Connect properly
Tighten or connect
properly
Have serviced by
Yamaha dealer
Clean or replace
Replace
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