There is a difference in the SA engine for gasoline, kerosene and distillate, it is in the pistons. The gasoline engine needing higher compression has a piston where the wrist pin is set lower in the piston body, the swept volume is the same but the piston top is higher up in the bore so with the same head the final compression ratio is higher. There were 3 basic sets of pistons, gasoline with compression ratio about 5.9 to 1, distillate with a compression ratio about 4.7 to 1 and kerosene with a compression ratio of 4.4 to 1. The distillate/kerosene engines had a hop manifold with a flap valve to control heat input and they had carburetors with a drain tap on the bowl, if it stopped on kerosene you had to get rid of it out of the carburetor before trying to re-start on gasoline. The jets and venturi in the carburetor were also different. These tractors also had a separate started gasoline tank attached to the right-hand side of the cylinder head, radiator shutters, water temperature gauge and a head shield to fit over the manifold to stop the air from the fan cooling down the manifold
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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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