Originally positive ground. You can tell which way was by looking at the coil. If the NEG terminal goes to the ign switch, it's probably still POS ground. Before you go to start it, polarize the generator. Polarizing the generator is what tells it which pole is hot and ground. Polarizing is just taking a piece of 12 gauge wire and momentarily jumping across the BATT terminal and ARM terminals on the cutout relay. The cutout relay is that box on top of the generator with 2 terminals on it. If it happens to have a regulator, (3 or 4 terminals) the same applies.
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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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