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Seized engine: Seizure is caused by poor
G
lubrication, inadequate fuel, or an air leak.
Ask a Yamaha dealer to check.
RST90: "Hydrostatic lock" occurs when fuel
G
has filled cylinders during transportation of
vehicle: Remove spark plugs and turn en-
gine over several times with ignition off to
expel excess fuel. Ask a Yamaha dealer to
check.
Engine power is low
Low coolant temperature indicator light is
G
flashing: Warm engine up.
Faulty spark plugs: Clean or replace spark
G
plugs.
RST90: Incorrect carburetor jetting for alti-
G
tude or temperature: Ask a Yamaha dealer
to check.
Improper fuel flow: See "Engine turns over
G
but does not start–Fuel system" above.
Incorrect V-belt clutch settings for altitude
G
or conditions: Ask a Yamaha dealer to
check.
Engine constantly backfires or mis-
fires
Faulty spark plugs: Replace spark plugs.
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Clogged fuel system: See "Engine turns
G
over but does not start–Fuel system"
above.
Malfunctioning T.O.R.S.: See "Engine turns
G
over but does not start–Electrical system"
above.
Engine overheats
Insufficient coolant: Add coolant.
G
Air in cooling system: Bleed cooling system
G
or ask a Yamaha dealer to check.
Leaking coolant: Ask a Yamaha dealer to
G
check.
Snowmobile does not move
Malfunctioning V-belt clutch: Ask a Yamaha
G
dealer to check.
Troubleshooting
Drive track does not move: Foreign object is
G
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
G
Yamaha dealer to check.
V-belt twists
Improper V-belt: Replace with correct V-
G
belt.
Incorrect V-belt clutch offset: Ask a Yamaha
G
dealer to check.
Loose or broken engine mount(s): Ask a
G
Yamaha dealer to check.
V-belt slips or becomes extremely hot
Oily or dirty V-belt or primary and second-
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ary sheave assembly surfaces: Clean.
Problem with driveline: See "V-belt twists"
G
above.
Engine does not upshift or downshift
properly or engages harshly
Worn or damaged V-belt: Replace V-belt or
G
ask a Yamaha dealer to check.
Incorrect V-belt clutch settings for altitude
G
or conditions: Ask a Yamaha dealer to
check.
Worn or sticking primary sheave assembly:
G
Ask a Yamaha dealer to check.
Worn or sticking secondary sheave assem-
G
bly: Ask a Yamaha dealer to check.
Noise or excessive vibration in drive
chain and sprockets
Broken V-belt clutch components: Ask a
G
Yamaha dealer to check.
Worn or damaged bearings: Ask a Yamaha
G
dealer to check.
Worn or damaged V-belt with flat spots: Re-
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place.
Worn or damaged idler wheels or shafts:
G
Ask a Yamaha dealer to check.
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