Carburetor Repair Kit For Tillotson RK-32HK, RK33HK. Kit Parts Are Compatible With Up To 25% Ethanol In Fuel. Quality Aftermarket Carburetor Rebuild Kit Made to meet or exceed OEM specifications. Replaces Tillotson Kit part number RK-32HK, RK-33HK OK to use fuel with up to 25% Ethanol with this kit