Dan, If all that you work on is the carburetor, the governor should not need to be changed or adjusted until after setting the carb. Top screw - Idle stop. It keeps the butterfly from closing too far. Middle screw that points toward the radiator - Idle mixture. Opening up this screw leans the mixture. Set for highest rpm without making black smoke (too rich). Bottom screw - Load adjustment.
Set them in the order you just read them. Put the throttle hand lever as you want it. There's no right or wrong, it is your preference. I had to set the operating range of the lever up on my '51H because of worn teeth on the plate.
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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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