I am not sure what the reduction is on the heisler unit for an F-20 is. You basicly have a high range (road gear in) and a low range (road gear out) that hooks up to the trans input shaft. On my F-12 the heisler unit sped up the tractor to about 6-8mph in high gear wide open. I took it back off because of bad bearings and seals in it and just run the stock speed now which is about 3.75 with the 36" tires it has. I have heard some F-20 with road gear would fly like the wind!
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Today's Featured Article - Choosin, Mounting and Using a Bush Hog Type Mower - by Francis Robinson. Looking around at my new neighbors, most of whom are city raised and have recently acquired their first mini-farms of five to fifteen acres and also from reading questions ask at various discussion sites on the web it is frighteningly apparent that a great many guys (and a few gals) are learning by trial and error and mostly error how to use a very dangerous piece of farm equipment. It is also very apparent that these folks are getting a lot of very poor and often very dangerous advice fro
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