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 - Tractor Profile: Case VA Series - by Staff. V, VC, VI and VO). Althouh the Case VA looked much like the V, it shared no major components with its predecessor. Except for military units, the production of the Case VA was interrupted in July of 1942 due to World War II. It resumed again in 1944 and continued until 1953. It started up briefly later on in 1953 and continued on a very limited basis until 1956. The VA Series included the following models: VA: Fixed front wheel tread VAC:
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