I have a 1941 W-4 and a 1948 Farmall Super A both of which have the kerosene manifolds, shutters and starter gasoline tanks. I have a spare cast iron chimney (exhaust pipe) for the W-4 (same as Farmall H) but have been unable to find a similar chimney for the Super A. OEM some years ago had one in their catalogue but not anymore, I may have to fabricate one from steel plate and pipe. I do not, however, intend to burn kerosene when the tractors are restored. In New Zealand in the late 1940s kerosene was about a third of the price per gallon of that of petrol (gasoline). Hence the popularity of kerosene burning tractors. However, when the 1950s brought in the use of rebate (no road tax in the price) petrol for farmers the use of kerosene stopped almost overnight. The shutters disappeared from the tractors, usually to get damaged in the tractor shed and so are now harder to find. The extra oil required daily to top up the sump after draining the top pint of kerosene diluted oil plus the more frequent required changes of oil increased running costs of kerosene tractors. The Nebraska tractor tests show gasoline tractors to have more available horsepower than their kerosene burning equivalents. That may be because the kerosene tractors had a much lower compression ratio (4.4 to 1) than the gasoline engines which had between 5.6 to1 and 6.0 to 1 compression ratios. There could be a problem with the low compression ratios the as the lowest grade gasoline we can get here is 91 octane but then my 1937 O-12 does not seem to mind even though the standard gasoline grade at the time it was built was about 60 octane. It was a gasoline tractor with again about a 4.4 to 1 compression ratio. The current price of kerosene, at least in small quantities, is about twice the price of gasoline.
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Today's Featured Article - Talk of the Town: Repairin a Gas Tank - by Staff. This interesting discussion is from the Tool Talk Discussion Forum. Remember that safety is your first priority - make sure you know what you are doing before attempting a potentially dangerous activity!
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