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 - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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