Since you mentioned using Ethanol gas, know that the cork float was factory sealed with lacquer. Ethanol dissolves lacquer and redistributes it through the carburetor. You will probably have to take the carburetor apart and clean the lacquer from all the little passageways. You will also need to clean off the float, dry it out, and reseal it with Fuel Proof model airplane dope, or a light coat of Super Glue. . . . 😀
