It is normal for the resistor to get hot in the engine is not running, the switch is on, and the points are closed. If it is a new resistor or if any oil or debris happened to get on the resistor it will smoke. Like any other electrical heating element, as then resistor gets hot its resistance goes up and less current will flow through it. It becomes self regulating in that it may get red hot but should not burn out. But like a coil there is no guaranty that they will act as designed. Just don't leave the switch on without the engine running and youl will not have the problem.
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Today's Featured Article - Experimental Tractors Article - by Danny Bowes (Dsl). Tractor technology appears to have nearly hit it's pinnacle of development. If you agreed with the subtitle, you are rather mistaken. Quite, actually. As a matter of fact, some of the technology experimented with over 40 years ago makes today's tractor technology seem absolutely stale by comparison. Experimentation, from the most complex assembly to the most simple and mundane component, is as an integral a part of any farm tractor's development
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