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EBU00440
Troubleshooting chart
There is fuel
1. Fuel
Check if there is
fuel in the fuel
Some fuel
tank
No fuel
2. Compression
Use electric starter
There is compresson
to see if there is
compression
No compression
3. Ignition
Wet
Remove spark
plug and check
electrodes
Dry
Engine turns
4. Battery
over quickly
Use electric
starter
Engine turns
over slowly
Remove the
Water or dirt
fuel hose from
mixed in fuel
the fuel cock.
Turn the fuel
cock to "ON"
Turn the fuel
cock to "OFF"
Turn the fuel
Restart engine
cock to "RES"
Supply fuel
Compression normal
Ask a Yamaha dealer to inspect
Wipe clean with dry
cloth
Attach spark plug
Use electric
cap and ground to
starter
chassis
Battery good
Check fluid, recharge,
check connections
8-73
Clean the fuel filter
and the fuel tank
Check fuel flow
No fuel
Spark good
Ignition system normal
Spark weak
Adjust spark plug
No spark
gap or replace
spark plug
Ask a Yamaha dealer to inspect
Fuel cock clogged
Clean fuel cock
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Chapters
Troubleshooting
