Bert: As far as your ignition problem - I don't know. But, as far as the carburetor - if that carb is totally clean (every tiny passage) and the float level is "dead on" and working, then you have an air leak somewhere. HALF CHOKE = LEAN. It is either where the carb bolts to the manifold, or where the manifold bolts to the head. Crank the M and take it up to mid throttle. While it is running 'rough', spray some WD-40 around the manifold-to-head runners at the head. If it smooths out, you've got an air leak there and you will need to remove the intake and have it planed off smooth at an automotive machine shop, then re-attach it with a new manifold gasket. Or, you may have a cracked manifold. If so, replace. Torque to 70 lbs.
Do you have a gasket between the carb flange and the bottom of the manifold? A good gasket? That is where I would check next for an air leak.
After that, check valve lash. It should be .017" @ hot.
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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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