Hydriv, thanks for the input. It did it when I bought it. I replaced all the fuel line with new 1/4" rubber hose and put in an inline fuel filter(didn't have one). I replaced the float valve and bowl gasket. Float is brass and in good condition. I also installed one of those plastic spacers between the carb and block. I didn't remove the tin work from around the engine as it has a good blast of air blowing out of it when running. His erector set of exhaust was cooking my foot so I took that off too. I bought a new coil, points, and condenser but I think it's a fuel problem. It doesn't behave any different with the gas cap off. I put in a brand new Auto-Lite spark plug as it had a fouled out champion in it. It was also missing the tin from the sides of the grill in front so I bought new ones because I didn't know if the hydro fan helped push air over that way too? I know some of the Wheel Horse tractors have the same engine turned so the fuel pump and carb are all inside the tin of the tractor, so heat must not be a big bother. When it runs it has all the balls it should, pulled a large Agri-Fab cart filled with stones and bricks up the hill along side my house, didn't miss a beat, ran it around the yard a little at almost wide open, shut it down, then started acting up after I restarted. Usually it does it while cutting grass. :headscratcher: :facepalm: