The mags have no speed related advance mechanism. The impulse coupling is set to trip at TDC. When it starts and gets past the point where the impulse clicks, it goes to full advance. It does not like that at low speeds and idle. I would bet it would run much smoother if the timing was retarded to about 10 or so degrees at idle, but it is at full advance. It will over heat and make no power retarded this much, so it is not an option. Assuming the carb has been tweaked to best running, the only solution is to use a distributor with centrifugal advance. I would put a distributor on it when using it, and a mag when showing. Remember a mag is grounded to stop, and a distributor is shut off from the ignition voltage. If it is crank start only, it may not have a battery. Thus live with it. JimN
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Today's Featured Article - The Cletrac General GG and the BF Avery A - A Bit of History - by Mike Ballash. This article is a summary of what I have gathered up from various sources on the Gletrac General GG and the B. F. Avery model A tractors. I am quite sure that most of it is accurate. The General GG was made by the Cleveland Tractor Company (Cletrac) of Cleveland, Ohio. Originally the company was called the Cleveland Motor Plow Company which began in 1912, then the Cleveland Tractor Company (1917) and finally Cletrac.
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