I recently obtained an old Wi. motor (AK series) that has a magneto completely frozen up with corrosion.
The magneto that came on the motor is a FM J.
I have a few other FM magnetos off of single cylinder Wisconsins, that have the same # of gear teeth, and that will bolt right up, but are different model #'s.
Probably a crazy question, but both of my working magnetos have a slightly different rotor shaft shape at the top than my original one does.Would that change the timing of the motor to the point where the magnetos are unusable in the AK?
I'd have to describe the original rotor as having a shaft that is half-round with a straight half (where the points close.)
Looking down from the top, it's like somebody basically took a circle, and cut half of it off.
The other shafts have the same round on half the shaft, with more of an oval shape where the points close.
Shaft diameters are all the same, and the points Look the same.
I would just put the old rotor shaft into one of the newer magnetos, but don't think it's reusable due to the pitting/corrosion.
Outside of buying a whole new/rebuilt magneto, any advice?