EBU00440
Troubleshooting chart
Starting problems or poor engine performance
8-48
Check fuel flow
1. Fuel
Check if there is
fuel in the fuel
tank
2. Compression
Kick the kick starter
to see if there is
compression
3. Ignition
Remove plugs and
check electrodes
Wet
Wipe clean with
dry cloth
Dry
Attach plug cap and
ground to chassis
Kick the kick
starter strongly
Spark weak
Spark good Ignition system normal
No spark
Ask a Yamaha dealer to inspect
Adjust plug gap or
replace plug(s)
There is compresson Compression normal
Ask a Yamaha dealer to inspectNo compression
There is fuel
Turn the fuel
cock to “OFF”
Remove the
fuel pipe
No fuel Fuel cock clogged
Clean fuel cock
Some fuel
Turn the fuel
cock to “RES”
Restart engine
No fuel Supply fuel
5FK-9-17-03 10/3/04 9:36 PM Page 49
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