1. Remove the float bowl. This is done by removing the two screws that hold it in place. Be careful not to lose the gasket.
2. Inspect the float. The float should be free of any dirt or debris. If it is dirty, clean it with a mild detergent and water.
3. Measure the float height. The float height is the distance from the top of the float to the bottom of the float bowl. The float height should be 13.8-14.2mm +/- 1.0mm.
4. Adjust the float height. If the float height is incorrect, you will need to adjust the float. This is done by bending the float tang. The float tang is a small metal tab that is located on the top of the float. To bend the float tang, you will need a pair of needle-nose pliers.
5. Reinstall the float bowl. Once the float height is adjusted, you can reinstall the float bowl. Be sure to install the gasket between the float bowl and the carburetor body.
6. Test the float adjustment. Start the engine and let it run for a few minutes. Then, turn off the engine and remove the float bowl. The float should be level with the top of the float bowl.
Note: The float adjustment is critical to the proper operation of the carburetor. If the float is not adjusted correctly, it can cause the engine to run rich or lean.