Some things to try. Modest compression loss (rings or leaky valves) can be exaggerated at low speeds where there is time for leakage to make a difference. A check of compression on the gas start cycle will check differences between cylinders (they should be within 8 to 10 % of each other) Poor injector pattern at low flow will also produce the issue. Find the missing cylinder/s by cracking loose the injector lines at the pump when running to find the ones not firing. Then swap the injectors between those and running cylinders. If the misfire follows the injector, the injector is in need of rebuild. Pumps and timing can be a factor, but the others are more likely. Jim
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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