If I remember right a factory propane engine uses a higher compression ratio to take care of the less BTU's in the propane. All of the tractors we converted in the 70's and 80's used the gas engines and to compensate we had to use a bigger regulator to provide the same hp resulting in a somewhat lower hp per hr than gas. However at that time gas was 1.00 per gal and propane was 30 cents per gal making it feasible to do. It is true the propane oil stays much cleaner than gas. I prefere a diesel because of the convienence of filling the tank.
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Today's Featured Article - A Cautionary Tale - by Ian Minshull. In the early 1950s my father bought an Allis Chalmers B and I used it for all the row crop work with the mangolds and potatoes, rolling and the haymaking on our farm. The farm and the Allis were sold and I have spent a lifetime working on farms throughout the country. I promised myself that one day I would own an Allis. That time event
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