IH offered three different compression ratios for the model H.
High compression gasoline 5.9 Combination gasoline-distillate 4.75 Kerosene 4.5
Presumably these three options would have been available for all Letter Series engines.
In the Nebraska Test of the Distillate burning H the fuel had an Octane rating of 37.
For the Gasoline engine Test the Octane rating was 71.
Maximum Belt HP Gasoline: 26.2 Fuel consumption: 0.532 lb per HP hour.
Maximum Belt HP Distillate: 23.31 Fuel consumption: 0.604 lb per HP hour.
At one time I had an H with a kerosene head and ran up quite a few hours burning jet fuel. The manifold heat control valve was set in the mid position (it was seized) and seemed to vaporise the fuel OK. For efficient operation the Owner"s Manual says to keep the pointer of the Heat Indicator at the top end of the green segment. This was easy enough to do under constant load, but when the load varied to any great degree it meant making continual adjustments to the radiator shutters. A real pain !
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Today's Featured Article - The Cletrac General GG and the BF Avery A - A Bit of History - by Mike Ballash. This article is a summary of what I have gathered up from various sources on the Gletrac General GG and the B. F. Avery model A tractors. I am quite sure that most of it is accurate. The General GG was made by the Cleveland Tractor Company (Cletrac) of Cleveland, Ohio. Originally the company was called the Cleveland Motor Plow Company which began in 1912, then the Cleveland Tractor Company (1917) and finally Cletrac.
... [Read Article]
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