Measured some main nozzles over the years. Best info I come up with is the nozzle for a gasoline M furnished in the fire crater piston sets. Top hole .069, middle .043, bottom .063, tip .136. In original 50983DC carb. Top .042, middle .046 bottom .053, tip .111. Some aftermarket in kits. top .040, middle .046, bottom .055, tip .111 Power improvment pakage for a M. Top .053, middle .062, bottom .070, tip 112. Main seat or jet was bigger also in the firecrater set and smaller than stock in the power improvment package. Also the total spark advance was decreased with a firecrater complete kit parts.
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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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