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5-2
E
Engine runs irregu-
larly or stalls
Fuel Empty Refill as soon as possi-
ble
3-3
Stale or contaminated Have serviced by
Yamaha dealer
4-10
Fuel tank Water or dirt present Have serviced by
Yamaha dealer
4-10
Spark plug Fouled or defective Replace 4-15
Incorrect heat range Replace 4-15
Gap incorrect Adjust 4-15
Spark plug cap Loose Connect properly 4-15
Cracked, torn, or dam-
aged
Replace
—
Electrical wir-
ing
Loose connection Tighten or connect
properly
—
Fuel injection
system
Jet nozzle clogged Have serviced by
Yamaha dealer
—
Warning light or
indicator blinks
Fuel level Empty Refill as soon as possi-
ble
3-3
Engine over-
heated
Jet intake clogged Clean
5-3
Check engine
warning
Faulty sensors Have serviced by
Yamaha dealer
—
Watercraft slow or
loses power
Yamaha Secu-
rity System
Low-RPM mode
selected
Select normal mode
2-18
Cavitation Jet intake clogged Clean 5-3
Engine speed reduc-
tion control activated
Clean jet intake and
cool engine
2-24
Oil pressure
warning
Engine speed reduc-
tion control activated
Add oil
2-23
Spark plug Fouled or defective Replace 4-15
Incorrect heat range Replace 4-15
Gap incorrect Adjust 4-15
Spark plug
caps
Loose Connect properly
4-15
Electrical wir-
ing
Loose connection Tighten or connect
properly
—
Fuel Stale or contaminated Have serviced by
Yamaha dealer
4-10
Air filter Clogged Clean or replace 4-13
Oil buildup Replace 4-13
TROUBLE POSSIBLE CAUSE REMEDY PAGE
UF1S10.book Page 2 Wednesday, December 17, 2003 1:11 PM
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