Thanks for the replys. I checked the serial numbers on both of the mags that I have tried. The one has no letters after the serial number and the one on the tractor now has an "L" at the end of the serial number. The one that is on it now, came off of a running Farmall H. I had a set of points break in it while plowing snow a couple of winters ago, so I swapped it with the one off of this M. So I have had the mag on a running tractor, but I have not had this engine in the M running. I have already checked to make sure #1 piston is at the top of it's travel with the tdc mark at the pointer. So it sounds like I had better pull the rocker cover and make sure the valve timing is correct for the crankshaft position. I have not checked the compression on this engine but it does blow out air against my thumb on the compression stroke. I have another running M with a distributer and two H's with mags that I can compare the magneto drive gear position with at tdc to see if something is out of time in the front of the engine. I am guessing that you are right, something is out of time. I will check it this weekend sometime when I have more time to get into it. It's caterpillars during the week and farmalls on the weekends. Thanks again for the replys and the help.
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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