Yamaha RST90K Owner's Manual download pdf (Page 90)

9-3

NOTE:

@

Make sure that both the red (+) lead and

the black (-) lead are seated securely in the

lead holders.

@

WARNING

@

Be sure to pull the lead covers back

over the terminals completely. If the ter-

minals are exposed, they could come

into contact with the frame or a metal

part of the snowmobile and this can

cause electrical system damage or A

FIRE HAZARD.

@

C. Electric starter does not operate or

operates slowly

1. Engine stop switch is pushed in ... Pull

it out.

2. Faulty wire connections ... Check con-

nections or ask a Yamaha dealer to

inspect.

3. Discharged battery... Charge battery or

see B above.

4. Seized engine ... Seizure is caused by

poor lubrication, inadequate fuel, or an

air leak—Ask a Yamaha dealer to

inspect.

5. “Hydrostatic lock” occurs when fuel has

filled the cylinders when the vehicle

has been transported. ... Remove the

spark plugs and turn the engine over

several times with the ignition off to

expel excess fuel. Ask a Yamaha

dealer to inspect.

D. Engine power is low

1. Low coolant temperature indicator light

is flashing ... Warm the engine up.

2. Faulty spark plugs ... Clean or replace

the spark plugs.

3. Incorrect jetting for altitude or tempera-

ture ... Carburetor. Ask a Yamaha

dealer to inspect.

4. Improper fuel flow ... See A.1 above.

5. Incorrect V-belt clutch settings for alti-

tude or conditions ... Ask a Yamaha

dealer to inspect.

E. Engine constantly backfires or mis-

fires

1. Faulty spark plugs ... Replace the

spark plugs.

2. Clogged fuel system ... See A.1. above.

3. Malfunctioning T.O.R.S. system ... See

A.2. above.

F. Engine overheats

1. Insufficient coolant ... Add coolant.

2. Air in cooling system ... Bleed air or ask

a Yamaha dealer to inspect.

3. Leaking coolant ... Ask a Yamaha

dealer to inspect.

G. Snowmobile does not move

1. Malfunctioning V-belt clutch ... Ask a

Yamaha dealer to inspect.

2. Drive track does not move ... Foreign

object is caught in the drive track, or

slide runners have melted to the slide

metal due to lack of lubrication.

3. Tight, loose, or broken drive chain ...

Ask a Yamaha dealer to inspect.

H. V-belt twists

1. Improper V-belt ... Replace with the

correct V-belt.

2. Incorrect V-belt clutch offset ... Ask a

Yamaha dealer to inspect.

3. Loose or broken engine mount ... Ask a

Yamaha dealer to inspect.

I. V-belt slips or burns

1. Oily or dirty V-belt or primary and sec-

ondary sheave assembly surfaces ...

Clean.

2. Problem with the driveline ... See H

above.

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