Power is affected by the setting of the main jet, but it is not easy to adjust for noticeably more power without having it on a dynamometer. You want to first be sure that your timing, spark and valve adjustments are exactly right, and then put it on a dyno if you can gain access to one. If you can't get it on a dyno your best bet is to get set up to mow or whatever job you have where you can notice an increase or decrease in power as you have already, then stop and adjust a little.It will be unlikely that you will notice a change unless it was way out. When under a heavy load if you are seeing black smoke it is an indication of running rich. Another possible test is to pull a loaded wagon of some sort up a good grade.
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Today's Featured Article - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
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