#2 compression reading is a possible leaky valve. I would recommend a valve adjustment.
This will do it. It is simple and fool proof. The process works for all 4 stroke engines with adjustable valves and any number of cylinders. Identifying the valve order is all that is necesary (given in this process for the 560). I do it this way others do a different system. It must be set cold first, so setting it twice (or once) is normal Set the intake valve on cylinder #1 (Front) when its exhaust valve just starts to open. Set the exhaust when the intake just closes. These are the two positions that can be seen on each cylinder, by looking at the valve springs and retainer, to be as far away from a lobe on the cam as possible while still knowing where it is. The order is (front to back EI-IE-EI-IE-EI-IE) Look at #1 valves, Turn the engine till the Exhaust just starts to begin opening (moves) then adjust the Intake valve. Rotate more until the intake just stops moving after having been open) and adjust the exhaust. Treat every cylinder (pair of valves shown above the same way, remembering they switch places between cylinders) I put a rag over the ones I have done to keep track of progress, and avoid mixing what I am looking at. Jim
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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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