The Carburetor Float is a needle usually made of hollow plastic, metal or fuel-tolerant foam that floats in the fuel inside the float-feed chamber, or bowl, mounted to the side of the carburetor. The floating needle regulates the amount of fuel entering the float chamber.
Symptoms of a failing Carburetor Float may include:
• Engine flooding
• Poor fuel economy
• Rich exhaust
Automotive professionals recommend periodically checking for proper weight using a float scale and replacing whenever carburetor is repaired.