Most kerosene-distillate tractors were in the 4 to 1 ratio range. Any higher, and they knocked like crazy if burning those fuels. The specific ratio may be available somewhere, although I don't think I've ever run across it. One thing that occurs to me is that, even if you don't come up with an exact ratio, a fairly-uniform pressure across the four cylinders would suggest that things are ok. One thing that was sometimes done to these tractors was to put in higher-compression pistons (which were available, I believe, as "high-altitude" pistons). This would have been done to allow using gasoline exclusively. There is always the possibility that this has been done at some time in the life of this tractor.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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