There are two possible sources, the intake valve, or the rings on that cylinder. Both are equally likely. If it is not smoking much, I might consider running it the way it is. Until it fouls the plug enough to misfire on that cylinder continually, it will be OK. A hotter plug in that cylinder alone might assist in reducing fouling. If you use the tractor hard, it might be OK as is. Good luck, JimN
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Today's Featured Article - More Memories of a Field Service Engineer - by Brian Dye. Introduction: The author worked for one of the largest Ford tractor dealerships in England as a trouble-shooter on tractor engines, hydraulics and combine harvesters from 1963 to 1972. In 1972 he became a dealer manager and finally left the dealer net in 1975 to run his own electronic design and manufacturing company. [Editor] We live right in the middle of Norfolk. The dealership that I worked for sold Fordson Tractors from the 1920's and some of t
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