2006 Yamaha Motorsports Grizzly 660 Auto. 4x4 SE Owners Manual - Page 177
2006 Yamaha Motorsports Grizzly 660 Auto. 4x4 SE Manual
Page 177 highlights
EBU08061 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 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. 8-63