2008 Yamaha Motorsports FX Nytro MTX Owners Manual - Page 76

2008 Yamaha Motorsports FX Nytro MTX Manual

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Troubleshooting 6. Connect the other end of the black (-) jumper cable to the negative (-) terminal of the discharged battery. 4. Seized engine: Seizure is caused by poor lubrication, inadequate fuel, or an air leak-. Ask a Yamaha dealer to inspect. Low coolant temperature indicator light is flashing: Warm the engine up. Faulty spark plugs: Clean or replace the spark plugs. Improper fuel flow: See "Fuel system" above. Incorrect V-belt clutch settings for altitude or conditions: Ask a Yamaha dealer to inspect. Engine power is low 1. 2. 3. 4. ECS00670 CAUTION: Do not reverse the connections! Make sure that all connections are secure and correct before attempting to start the engine. Any wrong connection could damage the electrical system. 7. 8. Start the engine. Disconnect the black (-) jumper cable from the negative (-) terminal of the discharged battery. 9. Disconnect the black (-) jumper cable from the negative (-) terminal of the battery used to jump start the engine. 10. Disconnect the red (+) jumper cable from the positive (+) terminal of the battery used to jump start the engine. 11. Disconnect the red (+) jumper cable from the positive (+) terminal of the discharged battery. 12. Install the right side cover and the shroud. Engine constantly backfires or misfires 1. 2. 3. Faulty spark plugs: Replace the spark plugs. Clogged fuel system: See "Fuel system" above. Malfunctioning T.O.R.S.: See "Electrical system" above. Insufficient coolant: Add coolant. Air in cooling system: Bleed the cooling system or ask a Yamaha dealer to inspect. Leaking coolant: Ask a Yamaha dealer to inspect. Malfunctioning V-belt clutch: Ask a Yamaha dealer to inspect. 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. Tight, loose, or broken drive chain: Ask a Yamaha dealer to inspect. Improper V-belt: Replace with the correct V-belt. Incorrect V-belt clutch offset: Ask a Yamaha dealer to inspect. Engine overheats 1. 2. 3. Snowmobile does not move 1. 2. Electric starter does not operate or operates slowly 1. 2. 3. Engine stop switch is pushed in: Pull it out. Faulty wire connections: Check connections or ask a Yamaha dealer to inspect. Discharged battery: Charge battery or see "Discharged battery" above. 3. V-belt twists 1. 2. 70

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Troubleshooting
70
6.
Connect the other end of the black (–)
jumper cable to the negative (–) terminal
of the discharged battery.
CAUTION:
ECS00670
Do not reverse the connections! Make
sure that all connections are secure and
correct before attempting to start the en-
gine. Any wrong connection could dam-
age the electrical system.
7.
Start the engine.
8.
Disconnect the black (–) jumper cable
from the negative (–) terminal of the dis-
charged battery.
9.
Disconnect the black (–) jumper cable
from the negative (–) terminal of the bat-
tery used to jump start the engine.
10.
Disconnect the red (+) jumper cable from
the positive (+) terminal of the battery
used to jump start the engine.
11.
Disconnect the red (+) jumper cable from
the positive (+) terminal of the discharged
battery.
12.
Install the right side cover and the shroud.
Electric starter does not operate or
operates slowly
1.
Engine stop switch is pushed in: Pull it
out.
2.
Faulty wire connections: Check connec-
tions or ask a Yamaha dealer to inspect.
3.
Discharged battery: Charge battery or
see “Discharged battery” above.
4.
Seized engine: Seizure is caused by poor
lubrication, inadequate fuel, or an air
leak—. Ask a Yamaha dealer to inspect.
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.
Improper fuel flow: See “Fuel system”
above.
4.
Incorrect V-belt clutch settings for altitude
or conditions: Ask a Yamaha dealer to in-
spect.
Engine constantly backfires or mis-
fires
1.
Faulty spark plugs: Replace the spark
plugs.
2.
Clogged fuel system: See “Fuel system”
above.
3.
Malfunctioning T.O.R.S.: See “Electrical
system” above.
Engine overheats
1.
Insufficient coolant: Add coolant.
2.
Air in cooling system: Bleed the cooling
system or ask a Yamaha dealer to in-
spect.
3.
Leaking coolant: Ask a Yamaha dealer to
inspect.
Snowmobile does not move
1.
Malfunctioning V-belt clutch: Ask a
Yamaha dealer to inspect.
2.
Drive track does not move: Foreign ob-
ject 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.
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.