Listen to the noise at idle, go to the carb side and move the governor to carb rod a little, (enough to make it change speeds a fer hundred RPM, not much. Listen to that knock, if it changes or goes away irregularly, and then comes back, it could be a wrist pin. I would not worry about wrist pin noise, engines can live for many years with a noisy wrist pin. If the noise stays consistant, and seems deep in the engine, Living with it might be OK. Keep tabs on the oil pressure, If the needle fluctuates radically at idle, I would probably remove the pan and check bearing clearances. If the pressure is OK, just keep an ear to the noise, and if it progersses, or changes, I would suggest a teardown sooner than later, as expenses mount as connecting rods find daylight. Jim
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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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