When you changed to 12 volt, did you change to negative ground? If so did you change polarity on coil? I have converted 2 tractors from 6 to 12 volts and had no problem at all. I like the 12 volts as I use the tractors at night and lights are easier to find in 12 than 6 volt and alternator keeps up better when running equipment that also has lights. You could have a points or condenser problem, sounds like it misses no matter what coil you use. On one of my conversions I used a resister ahead of the 6 volt coil for a long time and it worked fine, but resisters tend to burn out.
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Today's Featured Article - Choosin, Mounting and Using a Bush Hog Type Mower - by Francis Robinson. Looking around at my new neighbors, most of whom are city raised and have recently acquired their first mini-farms of five to fifteen acres and also from reading questions ask at various discussion sites on the web it is frighteningly apparent that a great many guys (and a few gals) are learning by trial and error and mostly error how to use a very dangerous piece of farm equipment. It is also very apparent that these folks are getting a lot of very poor and often very dangerous advice fro
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