Posted by pete 23 on July 24, 2012 at 19:25:59 from (74.32.238.2):
In Reply to: Farmall SMTA Timing posted by clay mcnamara on July 24, 2012 at 18:29:51:
Super MTA should be 30 degrees advanced at full throttle. That is the right way to check timing. Problem is, that model doesn't have a 30 degree mark on the pulley so you will have to measure and calculate it out. If it has been converted to fire crater it should have been changed to a 22 degree advance and that was supposed to be marked on the pulley. I can tell you the measurement of that 22 degree mark as I did many, it is 1 and 7/16 inch before the top dead center mark. There again, you always set the timing on them at full throttle. If your distributor is in excellent condition, then the timing will fall right close to top dead center at a low idle speed of about 450 rpm but I can tell you, very few will. It is the high rpm timing that is important, and let the low end fall where it may. But, you should know which advance you have in the distributor with takes a little playing around with timing light or taking breaker plate out of dist and looking at the marking on shaft. They are all marked. Actually about 5 different ones and over the years who knows what has been put in that tractor.
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