2011 Yamaha Motorsports Big Bear 400 4x4 IRS Owners Manual - Page 132
2011 Yamaha Motorsports Big Bear 400 4x4 IRS Manual
Page 132 highlights
EBU25751 Troubleshooting chart 1. Fuel There is enough fuel. Check the fuel level in the fuel tank. There is no fuel. Supply fuel. Check the compression. The engine does not start. Check the compression. 2. Compression There is compression. Operate the electric starter. There is no compression. Have a Yamaha dealer check the ATV. Check the ignition. 3. Ignition Wet 8 Wipe off with a dry cloth and correct the spark plug gap, or replace the spark plug. Open the throttle halfway and operate the electric starter. Remove the spark plug and check the electrodes. Dry Have a Yamaha dealer check the ATV. The engine does not start. Check the battery. 4. Battery Operate the electric starter. The engine turns over quickly. The engine turns over slowly. The battery is good. Check the battery lead connections, and charge the battery if necessary. The engine does not start. Have a Yamaha dealer check the ATV. 8-52