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EBU00440
Troubleshooting chart
1. Fuel
Check if there is
fuel in the fuel
tank.
2. Compression
Use electric starter
to see if there is
compression.
3. Ignition
Remove plug and
check electrodes.
Wet
Wipe clean with dry
cloth.
Dry
Attach plug cap and
ground to chassis.
Use electric
starter.
Spark weak.
Spark good. Ignition system normal.
No spark.
Ask a Yamaha dealer to inspect.
Adjust plug gap or
replace plug.
There is compresson. Compression normal.
Ask a Yamaha dealer to inspect.No compression.
There is fuel.
Turn the fuel
cock to “OFF”.
Remove the
fuel hose from
the fuel cock.
Some fuel.
Turn the fuel
cock to “RES”.
Restart engine.
No fuel. Supply fuel.
4. Battery
Use electric
starter.
Engine turns
over quickly.
Battery good.
Engine turns
over slowly.
Check fluid, recharge,
check connections.
Check fuel flow.
Water or dirt
mixed in fuel.
Turn the fuel
cock to “ON”.
No fuel. Fuel cock clogged.
Clean the fuel filter and
the fuel tank.
Clean fuel cock.
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