2003 Yamaha Motorsports Kodiak 400 Auto. 4x4 Owners Manual - Page 166

2003 Yamaha Motorsports Kodiak 400 Auto. 4x4 Manual

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EBU00806 Troubleshooting charts Starting problems or poor engine performance Turn the fuel cock lever to "ON". There is fuel. 1. Fuel Check if there is fuel in the fuel tank. Some fuel. Turn the fuel cock lever to "OFF". Turn the fuel cock lever to "RES". Supply fuel. Remove the fuel hose from the fuel cock. Check the fuel flow. No fuel. Fuel cock is clogged. Restart the engine. Clean the fuel cock. No fuel. 2. Compression Use the electric starter to see if there is compression. There is compression. Compression normal. No compression. Ask a Yamaha dealer to inspect. 3. Ignition Remove the spark plug and check electrodes. Wet Wipe clean with dry cloth. Spark is good. Attach spark plug cap and ground to chassis. Use the electric starter. Ignition system is normal. Dry Spark is weak. Adjust the spark plug gap or replace the spark plug. 4. Battery Use the electric starter. Engine turns over quickly. Engine turns over slowly. No spark. Battery is good. Check the connections. Ask a Yamaha dealer to inspect. 8-55

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8-55
EBU00806
Troubleshooting charts
Starting problems or poor engine performance
1. Fuel
Check if there is fuel
in the fuel tank.
There is fuel.
Turn the fuel cock
lever to “OFF”.
No fuel.
Fuel cock is
clogged.
Clean the
fuel cock.
Some fuel.
Turn the fuel cock
lever to “RES”.
Restart the engine.
No fuel.
Supply fuel.
2. Compression
Use the electric
starter to see if
there is compression.
There is compression.
Compression normal.
No compression.
Ask a Yamaha dealer to
inspect.
3. Ignition
Remove the
spark plug and
check electrodes.
Wet
Wipe clean with dry cloth.
Dry
Attach spark plug cap and
ground to chassis.
Use the
electric starter.
Spark is good.
Ignition system is
normal.
Spark is weak.
Adjust the spark plug gap
or replace the spark plug.
No spark.
Ask a Yamaha dealer to
inspect.
4. Battery
Use the electric starter.
Engine turns over
quickly.
Battery is good.
Engine turns over
slowly.
Check the connections.
Check the
fuel flow.
Turn the fuel cock
lever to “ON”.
Remove the fuel hose
from the fuel cock.