Really simple to check the advance. First thing is to look inside the distributor. Take the breaker plate out so you can see the marking on the shaft. It will say 40L or 30L or some other one of several different advances. Then you know what you are dealing with. Static time the engine to top dead center, mark the front pulley or flywheel off in degrees. Hook up a timing light and see if it is near top dead center at low idle & gradually increases the advance up to the total that is marked on the shaft when you reach rated rpm's. It should have a 30 degree advance but a 40 will work as is probably what is in it but you never know. If you do not have the correct total advance you never will achieve maximum horse power. Also, if it does not retard as the engine slows down you will not have good lugging power. If you had it on a dyno you could change the timing as it is pulling and set for max power, then note that timing and select the correct advance distributor shaft for your purpose.
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Today's Featured Article - Gatherin of the Orange - by Rick Nikolich. In July of 1998 I was talking to fellow Allis Chalmers collector Mike Schilling about the annual "Gathering of The Orange" AC show coming up in August of 1999. He got this wild idea that we should get a convoy of AC tractors and drive them from Charlotte, Michigan 105 miles to LaGrange, Indiana.
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