How to Adjust Floats on a Edelbrock Carb

by Max Stout

Edelbrock is an aftermarket manufacturer of high-performance automobile engine parts. The company was founded by Vic Edelbrock in 1938. Carburetors or "carbs", are one of the products that Edelbrock builds that are popular among racing enthusiasts. One of the last steps taken during the assembly of an Edelbrock carburetor involves the adjustment of 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 proper tools and a basic understanding of engine carburetion.

Step 1

Turn the top or airhorn of the carburetor upside down so that the floats are facing up. Hold the airhorn flange gasket in place along the perimeter of the floats as you turn the floats over.

Step 2

Measure the distance from the top outer end of the float to the top of the airhorn flange gasket with a measuring ruler. The required distance is 7/16-inches. If this is not the distance shown on the ruler, an adjustment of the float must be made.

Step 3

Bend the float lever arm slightly using 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

Measure the distance again and repeat Step Three if necessary. Do not place excessive pressure on the float arm or the float valve that is below it. The arm is thin and bends without much resistance.

Step 5

Turn the airhorn over and allow the float to hang free.

Step 6

Measure the distance from the gasket to the top outer end of the float with the ruler. The required distance can vary between 15/16-inch and one-inch.

Step 7

Bend the tab at the rear of the float pivot using the needle-nose pliers. Bend it up slightly to lower the float, and down to raise it. Adjust until the required distance is reached.

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