Yamaha Vector RS90RX, Owner'S Manual

Page: 76 / 90

Troubleshooting
70
8. Start the engine.
9. Disconnect the black (–) jumper cable
from the black (–) connecting lead, and
then pull the cover completely over the
lead terminal.
10. Disconnect the black (–) jumper cable
from the negative (–) terminal of the bat-
tery used to jump start the engine.
11. Disconnect the red (+) jumper cable from
the positive (+) terminal of the battery
used to jump start the engine.
12. Disconnect the red (+) jumper cable from
the red (+) connecting lead, and then pull
the cover completely over the lead termi-
nal.
13. Install the red (+) connecting lead into the
lead holder.
14. Install the right side cover and the shroud.
NOTE:
Make sure that both the red (+) connecting
lead and the black (–) connecting lead are
seated securely in the lead holders.
Electric starter does not operate or
operates slowly
●
Engine stop switch is pushed in: Pull it out.
●
Faulty wire connections: Check connec-
tions or ask a Yamaha dealer to inspect.
●
Discharged battery: Charge battery or see
“Starting the engine with a discharged bat-
tery” above.
●
Seized engine: Seizure is caused by poor
lubrication, inadequate fuel, or an air leak.
Ask a Yamaha dealer to inspect.
●
“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.
Engine power is low
●
Low coolant temperature indicator light is
flashing: Warm the engine up.
●
Faulty spark plugs: Clean or replace the
spark plugs.
●
Incorrect carburetor jetting for altitude or
temperature: Ask a Yamaha dealer to in-
spect.
●
Improper fuel flow: See “Engine turns over
but does not start–Fuel system” above.
●
Incorrect V-belt clutch settings for altitude
or conditions: Ask a Yamaha dealer to in-
spect.
Engine constantly backfires or mis-
fires
●
Faulty spark plugs: Replace the spark
plugs.
●
Clogged fuel system: See “Engine turns
over but does not start–Fuel system”
above.
●
Malfunctioning T.O.R.S.: See “Engine turns
over but does not start–Electrical system”
above.
Engine overheats
●
Insufficient coolant: Add coolant.
●
Air in cooling system: Bleed the cooling sys-
tem or ask a Yamaha dealer to inspect.
●
Leaking coolant: Ask a Yamaha dealer to
inspect.
Snowmobile does not move
●
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.
V-belt twists
●
Improper V-belt: Replace with the correct V-
belt.
U8GM10E0.book Page 70 Friday, April 27, 2007 6:43 PM