Edelbrock is a manufacturer of high performance automotive engine parts. The company was founded by Vic Edelbrock in 1938. Carburetors, or “carbohydrates,” are one of the products Edelbrock manufactures and is popular with racing enthusiasts. One of the last steps taken when mounting an Edelbrock carburetor is adjusting the fuel float. The float controls the amount of fuel that enters the carburetor from the fuel pump. You can adjust the float with the right tools and a basic understanding of engine carburetion.
Step 1: how to adjust the carburetor float
Turn the carburetor top or air horn upside down so the floats are facing up. Hold the horn flange gasket in place along the perimeter of the floats while rotating the floats.
Step 2: how to set the carburetor float
Measure the distance from the top outer end of the float to the top of the horn flange gasket with a ruler. The required distance is 7/16 inches. If this is not the distance shown on the ruler, a float adjustment must be made.
Step 3: how to regulate motorcycle carburetor float
Slightly bend the float lever arm with needle nose pliers. Grip the arm lever in the flat area in front of the float pivot. Bend the arm up if the distance is less than required or down if the distance is too great.
Step 4: how to regulate floating carburetor
Measure the distance again and repeat Step Three if necessary. Do not put excessive pressure on the float arm or the float valve below it. The arm is thin and bends without much resistance.
Step 5: how to repair a carburetor float
Flip the horn over and let the float hang freely.
Step 6: how to regulate carb needle
Measure the distance from the gasket to the upper outer end of the float with the ruler. The required distance can vary between 15/16 inches and one inch. Bend the tab on the back of the float pivot with needle nose pliers. Bend it slightly up to lower the float and down to raise it. Adjust until the required distance is reached.
- Measuring ruler
- Needle nose pliers