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Troubleshooting charts
Starting problems or poor engine performance
1. Fuel
Check if there is fuel
in the fuel tank.
2. Compression
Use the electric
starter to see if
there is compression.
3. Ignition
Remove the
spark plug and
check the electrodes.
4. Battery
Use the electric starter.
There is fuel.
Check the compression.
Supply fuel.
No fuel.
There is compression.
Compression normal.
Ask a Yamaha dealer to
No compression.
inspect.
Wipe clean with dry cloth.
Wet
Attach spark plug cap and
Dry
ground to chassis.
Engine turns over
Battery is good.
quickly.
Check the connections, and ask
Engine turns over
a Yamaha dealer to charge the
slowly.
battery if necessary.
Restart the engine.
Use the
electric starter.
8-159
Ignition system is
Spark is good.
normal.
Spark is weak.
Adjust the spark plug gap
No spark.
or replace the spark plug.
Ask a Yamaha dealer to
inspect.
5B410024
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