Well then it could be a passage cloged. Ran into this with a Mc Culloch chainsaw once. The gasket that goes between the carb and the manifold. There is a little 1/8 dia. hole that was missing in the new gasket. Punched the little hole and bingo! Are you sure the needle seat isn't "f" up?. Is there slop in the linkage between the govenor and the carb butterfly valve? That will also wreck your day. That is why Briggs engines have that little spring on the rod going to the butterfly. Any slop at all and they go Squirrely. Have seen this so many times with portable generators. Those thing are ment to run full tilt at 3600 rpm. They work Perfectly when you pour in Hi-Test gas. With regular they keep hunting. Really, see if it helps.
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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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