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PERIODIC MAINTENANCE AND MINOR REPAIR

EAU02990

Troubleshooting charts Starting problems or poor engine performance

EW000125

WARNING Keep away open flames and do not smoke while checking or working on the fuel system.

1. Fuel

There is enough fuel.

Check the compression.

Check the fuel level in the fuel tank.

There is no fuel.

Supply fuel.

The engine does not start. Check the compression.

Operate the electric starter.

There is compression.

Check the ignition.

There is no compression.

Have a Yamaha dealer check the vehicle.

2. Compression

3. Ignition

Wet

Wipe off with a dry cloth and correct the spark plug gaps, or replace the spark plugs.

Open the throttle halfway and operate the electric starter.

Remove the spark plugs and check the electrodes.

Dry

Have a Yamaha dealer check the vehicle.

The engine does not start. Check the battery.

4. Battery

The engine turns over quickly.

The battery is good.

Operate the electric starter.

The engine turns over slowly.

Check the battery lead connections, and charge the battery if necessary.

6-34

The engine does not start. Have a Yamaha dealer check the vehicle.

6

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