When a carb floods after running awhile whether it be a small engine, a Holley, a Rochester, or any other brand the problem is the float. It is either sinking because of a slow leak or is hanging up on its pivot or valve. Good Luck, Rick
The only way to check the float is to take the carb apart. Remember on those that the needle valve and its long seat need to be removed before you take the top screws out.
Edited by boyscout862, March 10, 2017 - 10:28 AM.