How much have you run it since you did the tune up? These old engines tend to be a little cranky with old gasoline and when not run. Sitting up tends to make them run rough . . . for a while. Hook a load to it and go to work. Every time it starts running rough stop and drain the carb, blow out the fuel line and clean the bowl under the tank. It usually takes about a tank of gasoline to get it going right. (This the way I had to do it every spring back in the day). BTW if you have a rubber hose instead of the steel fuel line that was stock that could be an issue. Rubber fuel lines seem to have loops and will drop below the carb. Air bubbles can get trapped in the loop and cause the engine to run rough even with a clear carb and good fuel.
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Today's Featured Article - Memories of an IH Super A When I was ? up to 10, I worked on my Papaw's farm in Greeneville, TN every summer. As I grew older (7), it was the thrill of my day to ride or drive on the tractor. My Papaw had a 1954 IH Super A that he bought to replace a Cub. My Papaw raised "baccer" (tobacco) and corn with the Super A, but the fondest memory was of the sawmill. He owned a small sawmill for sawing "baccer" sticks. The Super A was the powerplant. When I was old enough (7 or 8), I would get up early and be dressed to
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