2005 Yamaha Motorsports Big Bear 400 4x4 Owners Manual - Page 156
2005 Yamaha Motorsports Big Bear 400 4x4 Manual
Page 156 highlights
EBU00440 Troubleshooting chart 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 the 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 battery lead connections, and charge the battery if necessary. Ask a Yamaha dealer to inspect. 8-47