Yamaha YW50T - Manual (Page 60)

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PERIODIC MAINTENANCE AND MINOR REPAIR
There is no compression.
EAU01397
Troubleshooting chart
EW000125
w
Keep away open flames and do not smoke while checking or working on the fuel system.
1. Fuel
The engine does not start.
Check the compression.
Check the fuel level in
the fuel tank.
There is enough fuel. Check the compression.
There is no fuel. Supply fuel.
2. Compression
Operate the electric starter.
There is compression. Check the ignition.
Have a Yamaha dealer check the vehicle.
3. Ignition
Remove the spark plug and
check the electrodes.
Wet
Wipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug.
Have a Yamaha dealer check the vehicle. Dry The engine does not start.
Check the battery.
Open the throttle halfway and
operate the electric starter.
4. Battery
Operate the electric starter.
The engine turns over
quickly.
The battery is good.
The engine turns over
slowly.
Check the battery lead
connections, and charge the
battery if necessary.
The engine does not start.
Have a Yamaha dealer
check the vehicle.
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