You are not paying attention.When the engine starts the drive spins out when centrifgal force makes the pin back out of the recess.LOL if you want because you dont know how the drive works.You can hear the pinion gear spin back the instant the engine starts.The 9N drives were borrowed from the 60 hp v8.They would kick out when 1 cylinder fired.In the V8 another cylinder fired sooner so the drive worked ok on the V8.Ford started using the positive drive in the 52 Ford 6 cylinder OHV engine.This engine was made as a 4 cylinder for the NAA tractor both engines use the same EAF prefix on the part numbers.I was working in a Ford garage when the new 57 Fords came out in Oct of 1956.You can buy a drive for your tractor from a Ford,Mercury or Lincoln.dealer.All used the positive drive.
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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