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PERIODIC MAINTENANCE AND MINOR REPAIR
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EAU01397
Troubleshooting chart
EW000125
w
Never check the fuel system while smoking or in the vicinity of an open flame.
1. Fuel
2. Compression
3. Ignition
4. Battery
Use electric starter.
Remove spark
There is compression.
Go to ignition check.
No compression.
Ask a Yamaha dealer to inspect.
Wet
Dry
Wipe clean with dry cloth and
Open the throttle half-way and start
Ask a Yamaha dealer to inspect.
Engine turns over
Engine turns over
Battery good.
Check connections
Use electric starter.
Check if there is fuel
Enough fuel
No fuel
Go to compression check.
Supply fuel.
in the fuel tank
electrode.
plug and check
quickly.
slowly.
or recharge.
Engine doesn’t start, go to battery
check.
the engine.
adjust plug gap or replace plug.
Engine doesn’t start, ask a Yamaha
dealer to inspect.
Engine doesn’t start, go to
compression check.
4PX-9-25-7, 8, 9(AUS) 4/17/0 12:44 PM Page 1