For sure, Ive seen many wired backwards and still run (I was a used tractor dealer for years and have about seen it all lol) but data Ive seen shows the coil voltage has to rise as much as 4000 volts higher if wired backwards meaning less efficiency and more heat losses if wired backwards. Its easier to emit electrons from a plugs hotter (electrode) to a relatively cooler (ground strap) is the reason, same reasons why theres a heater under the cathode in an old fashioned radio tubes.
Also right on what can happen if 12 volts is applied to a 6 volt coil (i.e. no ballast), they can get so hot the nasty black oil boils out and/or the coil just has like a melt down.
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Today's Featured Article - Women and Tractors, A Woman's Touch - by Teri Burkholder. I thought I would give you a little background on how I got myself hooked on tractors and their restoration. My family is a very "crafty" bunch of people. By crafty I mean good with crafts!! My Dad is a retired industrial engineer from Bucyrus Erie which made big shovels for excavating and he is also a wonderful wood worker. My mom and my "guardian angel" has had her own ceramic shop for 30 years and is an excellent painter. With these skills always active in our house it was hard not t
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