ok, i'm convinced that the #1 enemy to classic tractors is ETHANOL! my H probably needs some tuning up, but i'm gonna give this seafoam a shot to help the fuel system. i'm figuring that in 1941 (year my H was built) there was no ethanol. and considering the guy i bought this from did actually use it, that new gas might have done some unpleasant things to the fuel system/engine. anyone else agree?