The oil fouled plugs indicate that you have a serious problem. A cylinder leakage test will pinpoint where the problem is. If you apply compressed air to the cylinder with a cylinder leakage gauge, you will hear the air escaping to the crankcase (bad rings, piston, cylinder), to the intake manifold (intake valve), exhaust manifold (exhaust valve), or cooling system (head gasket/block). The oil fouled plugs would most likely indicate a problem with the piston rings or piston. Excessively worn intake valve guides could also cause oil fouling but not to this extent. A good reading for a cylinder leakage test is 90% (i.e. if you apply 100 psi the cylinder would hold 90 psi). Anything lower than this indicates a worn engine and major engine repairs.
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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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