Yamaha Raptor YFM7RSEZ Owner's Manual - page 129

8-50

8

EBU27691

Troubleshooting charts 

Starting problems or poor engine performance

Check the fuel level in

the fuel tank.

1. Fuel

There is enough fuel.

There is no fuel.

Check the compression.

Supply fuel.

The engine does not start. 

Check the compression.

Operate the electric starter.

2. Compression

There is compression.

There is no compression.

Check the ignition.

Have a Yamaha dealer

check the ATV.

Remove the spark plug

and check the electrodes.

3. Ignition

Wipe off with a dry cloth and correct the

spark plug gap, or replace the spark plug.

Have a Yamaha dealer check the ATV.

The engine does not start.

Have a Yamaha dealer

check the ATV.

The engine does not start.

Check the battery.

Operate the electric starter.

4. Battery

The engine turns over 

quickly.

The engine turns over 

slowly.

The battery is good.

Check the battery lead connections,

and charge the battery if necessary.

Dry

Wet

Operate the electric starter.

U1AS10E0.book  Page 50  Tuesday, February 10, 2009  9:33 AM