5-2
E
Engine runs irregu-
larly or stallsFuel Empty Refill as soon as possi-
ble3-4
Stale or contaminated Have serviced by 
Yamaha dealer4-10
Fuel tank Water or dirt present Have serviced by 
Yamaha dealer4-10
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-
agedReplace
—
Electrical wir-
ingLoose connection Tighten or connect 
properly—
Fuel injection 
systemJet nozzle clogged Have serviced by 
Yamaha dealer—
Warning light or 
indicator blinksFuel level Empty Refill as soon as possi-
ble3-4
Engine over-
heatedJet intake clogged  Clean
5-3
Check engine 
warningFaulty sensors Have serviced by 
Yamaha dealer—
Wate rcr af t slow  or  
loses powerYamaha 
Security 
System 
(VX110 
Deluxe)Low-RPM mode 
selectedSelect normal mode
2-15
Cavitation Jet intake clogged Clean 5-3
Impeller damaged or 
wornHave serviced by 
Yamaha dealer—
Engine over-
heat warningEngine speed reduc-
tion control activatedClean jet intake and 
cool engine2-22
Oil pressure 
warningEngine speed reduc-
tion control activatedAdd oil
2-21
Spark plug Fouled or defective Replace 4-15
Incorrect heat range Replace 4-15
Gap incorrect Adjust 4-15
Spark plug 
capsLoose Connect properly
4-15
Electrical wir-
ingLoose connection Tighten or connect 
properly—
Fuel Stale or contaminated Have serviced by 
Yamaha dealer4-10
Air filter Clogged or oil buildup Have serviced by 
Yamaha dealer4-13 TROUBLE POSSIBLE CAUSE REMEDY PAGE
UF1K70.book  Page 2  Friday, November 19, 2004  2:42 PM