Page 85 of 96
Maintenance and care
78
(3) Secure the battery in place. WARNING!
Fire or explosion could result if the
breather hose is damaged, obstruct-
ed, or not connected properly.
 [EWJ00451]
EJU34491
Fuel injection system 
If the fuel injection system is malfunctioning,
have a Yamaha dealer service the watercraft.
EJU37500Checking the trolling speed 
(1) Place the watercraft in the water.
(2) Start the engine and warm it up. Use the
tachometer in the dual analog meter unit
to check the trolling speed.
If the trolling speed is out of specification,
have a Yamaha dealer service the watercraft.
1Negative (–) battery terminal: Black lead
2Positive (+) battery terminal: Red lead
3Breather hose
Trolling speed:
1250 ±100 r/min
12
3
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Trouble recovery
80
EJU34560
Troubleshooting 
If you have any trouble with your watercraft, use this section to check for the possible cause.
If you cannot find the cause, or if the procedure for replacement or repair is not described in
this owner’s/operator’s manual, have a Yamaha dealer perform the necessary service.
EJU36982Troubleshooting chart 
TROUBLE POSSIBLE CAUSE REMEDY PAGE
Engine does not 
start (Starter motor 
does not turn over)Yamaha Se-
curity SystemLock mode selected Select unlock mode
31
Engine shut-
off switchClip not in place Install clip
25
Fuse Burned out Replace fuse and 
check wiring84
Battery Run down Recharge 76
Poor terminal con-
nectionsTighten as required
76
Terminal corroded Clean 68
Starter motor Faulty Have serviced by 
Yamaha dealer—
Engine does not 
start (Starter motor 
turns over)Throttle lever Squeezed Release 26
Fuel Empty Refill as soon as pos-
sible41
Stale or contaminat-
edHave serviced by 
Yamaha dealer72
Fuel tank Water or dirt present Have serviced by 
Yamaha dealer72
Spark plug Fouled or defective Clean or replace 74
Spark plug 
capNot connected or 
looseConnect properly
74
Connected to wrong 
cylinderConnect properly
74
Fuel injec-
tion systemFuel pump faulty Have serviced by 
Yamaha dealer—
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Trouble recovery
81
Engine runs irregu-
larly or stallsFuel Empty Refill as soon as pos-
sible41
Stale or contaminat-
edHave serviced by 
Yamaha dealer72
Fuel tank Water or dirt present Have serviced by 
Yamaha dealer72
Spark plug Fouled or defective Replace 74
Incorrect heat range Replace 74
Gap incorrect Adjust 74
Spark plug 
capLoose Connect properly 74
Cracked, torn, or 
damagedHave serviced by 
Yamaha dealer—
Electrical wir-
ingLoose connection Have serviced by 
Yamaha dealer—
Fuel injec-
tion systemFaulty or clogged in-
jectorsHave serviced by 
Yamaha dealer—
Warning light or in-
dicator blinksFuel level Empty Refill as soon as pos-
sible41
Oil pressure 
warningOil pressure dropped Have serviced by 
Yamaha dealer35
Engine over-
heatedJet intake clogged Clean
83
Check engine 
warningFaulty sensors Have serviced by 
Yamaha dealer37 TROUBLE POSSIBLE CAUSE REMEDY PAGE
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Trouble recovery
82
Watercraft slow or 
loses powerShift lever Not completely shift-
ed into forward posi-
tionPush lever forward 
until it stops 28
Yamaha Se-
curity SystemLow-RPM mode se-
lectedSelect normal mode
32
Cavitation Jet intake clogged Clean 83
Impeller damaged or 
wornHave serviced by 
Yamaha dealer83
Engine over-
heat warningEngine speed reduc-
tion control activatedClean jet intake and 
cool engine36
Oil pressure 
warningEngine speed reduc-
tion control activatedAdd oil
35
Spark plug Fouled or defective Replace 74
Incorrect heat range Replace 74
Gap incorrect Adjust 74
Spark plug 
capLoose Connect properly
74
Electrical wir-
ingLoose connection Have serviced by 
Yamaha dealer—
Fuel Stale or contaminat-
edHave serviced by 
Yamaha dealer72
Air filter Clogged Have serviced by 
Yamaha dealer72
Oil buildup Have serviced by 
Yamaha dealer72 TROUBLE POSSIBLE CAUSE REMEDY PAGE
UF2R70E0.book  Page 82  Thursday, November 6, 2008  10:05 AM