I had a miss in a Cockshutt 80 that I worked on for about 3 years. The engine ran ok under load, but at idle or no load there was a miss. I changed out the mag to a distributor and the miss was gone. I never suspected the mag because the tractor started good and there was a nice blue spark from the mag. The problem was in the impluse. It was really dirty and one coil on the spring was broken. I thimk the problems in the impluse caused the engine to get out of time. No bad enough for it not to run, but enough to develop a miss. I think the H4 mag is a good mag. it just might need some tlc. Good luck
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Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
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