Troubleshooting Chart - Yamaha 4SH-28199-67 Owner's Manual

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.
4. Battery
Use electric starter.
Turn the fuel
There is fuel.
cock to "OFF".
Turn the fuel
Some fuel.
cock to "RES".
No fuel. Supply fuel
There is compression.
Compression normal.
No compression. Ask a Yamaha dealer to inspect.
Wipe clean with
Wet
dry cloth.
Attach plug cap and
Dry
ground to chassis.
Engine turns over
Battery good.
quickly.
Engine turns over Recharge, check
slowly. connections.
Turn the fuel
cock to "ON".
Check fuel
Remove the fuel pipe
from the fuel cock. flow.
Restart engine.
Use the
electric starter.
Ask a Yamaha dealer to inspect.
8-95
No fuel.
Ignition system
Spark good.
normal.
Spark weak.
Adjust plug gap
No spark.
or replace plug.
Fuel cock
clogged.
Clean fuel
cock.