2011 Yamaha Motorsports Apex SE Owners Manual - Page 87

2011 Yamaha Motorsports Apex SE Manual

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Troubleshooting ESU12384 Engine turns over but does not start 1. Fuel system No fuel supplied to combustion chamber • No fuel in tank: Supply fuel. ↓ • Clogged fuel line: Clean fuel line. ↓ • Clogged injector: Ask a Yamaha dealer to inspect. G Fuel supplied to combustion chamber • Flooded engine: Crank engine or wipe the spark plugs dry. Electrical system G Poor spark or no spark • Spark plugs are dirty with carbon or are wet: Remove carbon or wipe the spark plugs dry. Replace if necessary. ↓ • Faulty ignition system: Ask a Yamaha dealer to inspect. ↓ • T.O.R.S. malfunction: Disconnect the throttle switch connectors and connect the wire harness connectors together to bypass the T.O.R.S. WARNING! Before bypassing the T.O.R.S., make sure that the throttle returns properly to the fully closed position. The T.O.R.S. is an important safety device; in the case of a malfunction, take the snowmobile to a Yamaha dealer immediately for repair. G [EWS00561] 2. 3. G Compression Insufficient • Loose cylinder head nuts: Tighten nuts properly. ↓ • Worn or damaged gasket: Replace gasket. ↓ • Worn or damaged piston and cylinder: Ask a Yamaha dealer to inspect. Discharged battery If the battery is discharged, the engine can be started using a fully-charged 12-volt battery and jumper cables. Two connecting leads have been provided for jump-starting the snowmobile. Due to the rubber engine mounting, the snowmobile frame is not a suitable grounding point for jump-starting the engine. 81

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Troubleshooting
81
ESU12384
Engine turns over but does not start
1.
Fuel system
●
No fuel supplied to combustion cham-
ber
•
No fuel in tank:
Supply fuel.
↓
•
Clogged fuel line:
Clean fuel line.
↓
•
Clogged injector:
Ask a Yamaha dealer to inspect.
●
Fuel supplied to combustion chamber
•
Flooded engine:
Crank engine or wipe the spark plugs
dry.
2.
Electrical system
●
Poor spark or no spark
•
Spark plugs are dirty with carbon or
are wet:
Remove carbon or wipe the spark
plugs dry. Replace if necessary.
↓
•
Faulty ignition system:
Ask a Yamaha dealer to inspect.
↓
•
T.O.R.S. malfunction:
Disconnect the throttle switch con-
nectors and connect the wire har-
ness connectors together to bypass
the T.O.R.S.
WARNING! Before by-
passing the T.O.R.S., make sure
that the throttle returns properly
to the fully closed position. The
T.O.R.S. is an important safety de-
vice; in the case of a malfunction,
take the snowmobile to a Yamaha
dealer immediately for repair.
[EWS00561]
3.
Compression
●
Insufficient
•
Loose cylinder head nuts:
Tighten nuts properly.
↓
•
Worn or damaged gasket:
Replace gasket.
↓
•
Worn or damaged piston and cylin-
der:
Ask a Yamaha dealer to inspect.
Discharged battery
If the battery is discharged, the engine can be
started using a fully-charged 12-volt battery
and jumper cables. Two connecting leads
have been provided for jump-starting the
snowmobile. Due to the rubber engine mount-
ing, the snowmobile frame is not a suitable
grounding point for jump-starting the engine.