We had a lawnmower back in the late '50's that had a wind-up spring- you wound up the spring, then pushed a lever to release it, and the unwinding spring turned the engine over and (hopefully) started it. It was a PITA in that application, because for most folks, its easier to just pull a rope (although it took less muscle to wind up the spring, so maybe an advantage for older folks). But I can see an advantage on a crank start tractor- you wouldn't be holding onto a crank, and any kick-back would be harmlessly absorbed by the spring.
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Today's Featured Article - An AC Model M Crawler - by Anthony West. Neil Atkins is a man in his late thirties, a mild and patient character who talks fondly of his farming heritage. He farms around a hundred and fifty acres of arable land, in a village called Southam, located just outside Leamington Spa in Warwickshire. The soil is a rich dark brown and is well looked after. unlike some areas in the midlands it is also fairly flat, broken only by hedgerows and the occasional valley and brook. A copse of wildbreaking silver birch and oak trees surround the top si
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