My Dad and I recently picked up a 1950 A propane version that had been sitting in someone's yard as an ornament for years. After completely tearing it apart and rebuilding it we decided to switch it back to gasoline. The carburetor that was on the tractor was a gasoline carb that had been converted to work with propane so we just switched it back to run on gasoline. (replaced the tank and sheet metal of course to the original gasoline version's look). The tractor ran fine for a little bit, even though it never sounded perfect. As we were driving it one time the pin on the carb that prevents the throttle butterfly from closing too far and thereby reopening broke and so when the governor tried pushing the throttle to idle, it overturned the plate and ended up revving the engine very high. We fixed the little pin so that this cannot happen again, however now we cannot get the tractor to run properly. I'm thinking it is a carb issue but since I don't know enough about these tractors I was hoping someone could give me some useful input. It also seems to only want to run when it is its mixture set very rich. The Manual we have says that the adjustment is 1.25 turns out on both adjustment screws however this one only wants to stay idling at about 3.5 turns out. I live at a high elevation (4000 ft.) so it should even be leaned out more not richened.
Any advice would be greatly appreciated!!!