Troubleshooting Chart - Yamaha TW125 Owner's Manual

Troubleshooting chart

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Keep away open flames and do not smoke while checking or working on the fuel system.
1. Fuel
Check if there is fuel
in the fuel tank.
2. Compression
Use the electric starter.
3. Ignition
Remove spark
plug and check
electrodes.
4. Battery
Use the electric starter.
PERIODIC MAINTENANCE AND MINOR REPAIR
Enough fuel. Go to compression check.
No fuel. Supply fuel.
There is compression. Go to ignition check.
No compression. Ask a Yamaha dealer to inspect.
Wipe clean with dry cloth and
Wet.
correct spark gap or replace plug.
Dry.
Ask a Yamaha dealer to inspect.
Engine turns over
Battery good.
quickly.
Engine turns over Check fluid, recharge,
slowly. check connections.
6-42
EAU03009
EW000125
Engine doesn't start, go to
compression check.
Open throttle half-way and start
the engine.
Engine doesn't start, go to battery
check.
Engine doesn't start, ask a Yamaha
dealer to inspect.
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