I just got this 1940 ford 9n that sat for about 2 years. I rebuilt the carburetor and cleaned the tank out and the replaced the fuel bowl, replaced the plugs, wires, points, and condenser. The tractor runs great at idle and with throttle but when I put it in 1st gear it does fine on flat ground but when you start up a hill or in 2nd or 3rd it just dies. I can start it right back and same thing happens. It?s converted to 12 volt. It has a full tank of gas. I pulled the governor off and looked at it and all looks good the balls aren?t flat spotted neither are the races. I did notice that the adjustment screw for the governor arm is missing but I don?t know what to set it to with a new bolt. Any help is appreciated