Maybe at the higher RPM the alternator has enough output that it back feeds through various paths that it shouldn't. Where at the lower RPMS the output is to low to cause a noticeable problem. All I know is electricity is force that goes by path of least resistance from source to ground. If that path happens to be feeding through ign. system it will go there, possibly causing problems with spark. I may be wrong, someone will correct me, we all learn.
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Today's Featured Article - The Mud Daubers and the Old John Deere - by Jon Zehnder. I have a 1941, John Deere Model A tractor I have owned for about a year and a half. This is my first (in case my wife reads this, "FIRST") tractor and it has been a learning experience. After considerable advise and assistance from local tractor nuts and the forums of Yesterday�s Tractors, I had finally got it running pretty well. I have tuned it up, overhauled the carburetor, installed a borrowed, rebuilt magneto, installed a new Power-Trol, patched the radiator, installed new front wheels a
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