Thanks for the advice. I did remove and clean the carb again and used compressed air to blow everything out. Reassembled and still has an irratic idle. I removed the top Governor cover, and I can use a screwdriver to hold linkage steady. It will idle perfectly smooth, then eventually get in a fit where the governor starts it's up and down. I am 99% satisfied it is not electrical. My local Case IH service manager of 35+ years has told me this is the nicest original Farmall (of any model) he has ever seen. Just mentioning that so you know it's not a worn out piece of junk. My grandfather was relentless with his care and maintenance of this tractor. I am baffled as it has always run flawless and I see nothing obvious. Would replacing any of the Governor parts cure it?
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Today's Featured Article - Measuring with Calipers - by Staff. The legs of inside calipers are curved outward at the extremities to facilitate measuring small holes, while outside caliper legs have a large curve inward to increase their capacity for large work. Firm-joint calipers are adjusted approximately by the hands and then set to the feel of the work by tapping them on a metal surface. It is a common practice when opening calipers by this means to tap the top of the joint. It is better, if possible, to tap the inside of the legs, as repeated blo
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