Posted by Tom Fleming on July 14, 2013 at 05:43:18 from (67.20.233.75):
In Reply to: E4A Magneto posted by EM Iowa on July 11, 2013 at 22:10:04:
I'll chime in a tad on the "charge the magnet" subject. At operating speed, it doesn't have a huge impact, however, at slow, starting speed, a "stronger" charged magnet will produce a better spark at lower RPM's.
The E4A and the F4 are designed and known to produce some of the "hottest" spark a low rpm's as compared to other mag's of the same era. This becomes a case of "optimal" vs "works".
There is an excellent book that covers a lot of this by now deceased Neil Yerigan, "How to Restore Tractor Magnetos".
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