Set the main jet at 4 turns out to begin with. I doubt if it will do much with 3 out. The rpm (throttle stop) screw on the carb should be set so that it idles without stumbling, maybe 600 rpm or so. With the idle mixture screw, 1 turn off the seat. With the engine running you just turn the idle screw in or out until smooth. It is the reverse of the main jet, in richens, out leans. If you get a good kit from CaseIH-$$-it will probably have an instruction sheet. Just get the carb CLEAN.
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Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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