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Aug/Sep 2008Subscribe NowEngine videos online! Check out the GEM video index on YouTube, the quickest way to find gas engine videos on the Internet. We’ve done the searching, all you have to do is the watching! Click below for GEM engine video index. |
High Compression John DeeresBy Paul Kesselring1408 N. Van Buren Ottumwa, Iowa 52501 In the 1940s or early 1950s, in the small town of Ollie in southeastern Iowa, Raphael Hollingsworth and Guido Stempel designed a device to increase the compression of John Deere model A, B and G tractors, and other makes of tractors. This was a ring inserted in the front or top of the cylinders. Mr. Hollingsworth was issued two patents for these rings, No. 2,452,238 in 1948 and No. 2,676,580 in 1954. These rings were made by the Six Foundry in Fairfield, Iowa, and most of the machine work was done by the Martin Machine and Electric in Ottumwa, Iowa. Mr. Hollingsworth also experimented with rings for other makes of tractors. A set of rings were installed in his nephew, Warren Bottorffs Farmall "M." Warren told me they increased the power and reduced the fuel consumption. Mr. Hollingsworth ha... 811 of 3100 characters shown.
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