Those really old tractors didn't know what lead was. Gas never had it until higher octane requirements for higher compression automobiles occurred. Cheapest way to increase the octane rating of gasoline is to add tetra-ethyl lead to it. When I was in the military we had scads of aircraft with recips. Military went to 115 octane avgas. It had so much lead in it that when you drained the sumps it left a white residue on your fingers. The spark plugs on some of the engines, especially the old Franklins, would constantly foul with lead deposits. Looked like the electrodes were soldered together.
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Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
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