Posted by model-a on June 24, 2014 at 14:51:24 from (151.213.140.90):
I wrongly posted this in another mans post. newbys, geesh. 49 super a has been converted to use a coil instead of magneto. Has run fine for over 20 years until last week. It lost power and finally had to have a pull before it would run. Checked spsark, very weak. New coil, no help. Cleaned points and gapped to .020 as per book with using coil instead of mag. Does not run. Tries to the point of blowing oil out the air breather. Not much to speak of just enough to let you know timing advanced too much. Not enough fire at plugs to run it. Any suggestions please?
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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