Troubleshooting
91
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Seized engine: Seizure is caused by poor
lubrication, inadequate fuel, or an air leak.
Ask a Yamaha dealer to check.
Engine power is low
●
Low coolant temperature indicator light is
flashing: Warm engine up.
●
Faulty spark plugs: Clean or replace spark
plugs.
●
Improper fuel flow: See “Fuel system”
above.
●
Incorrect V-belt clutch settings for altitude
or conditions: Ask a Yamaha dealer to
check.
Engine constantly backfires or mis-
fires
●
Faulty spark plugs: Replace spark plugs.
●
Clogged fuel system: See “Fuel system”
above.
●
Malfunctioning T.O.R.S.: See “Electrical
system” above.
Engine overheats
●
Insufficient coolant: Add coolant.
●
Air in cooling system: Bleed cooling system
or ask a Yamaha dealer to check.
●
Leaking coolant: Ask a Yamaha dealer to
check.
Snowmobile does not move
●
Malfunctioning V-belt clutch: Ask a Yamaha
dealer to check.
●
Drive track does not move: Foreign object is
caught in drive track, or slide runners have
melted to slide metal due to lack of lubrica-
tion.
●
Tight, loose, or broken drive chain: Ask a
Yamaha dealer to check.
V-belt twists
●
Improper V-belt: Replace with correct V-
belt.
●
Incorrect V-belt clutch offset: Ask a Yamaha
dealer to check.
●
Loose or broken engine mount(s): Ask a
Yamaha dealer to check.
V-belt slips or becomes extremely hot
●
Oily or dirty V-belt or primary and second-
ary sheave assembly surfaces: Clean.
●
Problem with driveline: See “V-belt twists”
above.
Engine does not upshift or downshift
properly or engages harshly
●
Worn or damaged V-belt: Replace V-belt or
ask a Yamaha dealer to check.
●
Incorrect V-belt clutch settings for altitude
or conditions: Ask a Yamaha dealer to
check.
●
Worn or sticking primary sheave assembly:
Ask a Yamaha dealer to check.
●
Worn or sticking secondary sheave assem-
bly: Ask a Yamaha dealer to check.
Noise or excessive vibration in drive
chain and sprockets
●
Broken V-belt clutch components: Ask a
Yamaha dealer to check.
●
Worn or damaged bearings: Ask a Yamaha
dealer to check.
●
Worn or damaged V-belt with flat spots: Re-
place.
●
Worn or damaged idler wheels or shafts:
Ask a Yamaha dealer to check.
●
Worn or damaged drive track: Ask a
Yamaha dealer to check.
U8GKS6E0.book Page 91 Tuesday, April 17, 2012 8:48 AM