Re: F 20 magneto

Posted by Bill Smith on April 24, 2003 at 10:33:05 from (63.147.130.62):

In Reply to: F 20 magneto posted by Aaron on April 24, 2003 at 06:49:34:

The F-4 is the mag you will want. There might be another mag that came from factory. The mags off of the regulars I think would interchange but were different in style. The F-4 mag on the F-20 originally had a spark advance that could be adjusted from drivers seat. Basically was just a linkage that went up from the mag through the hood to a lever that ran back to the steering post. The linkage, connected to a rotating cap that covered the points. It would rotate about 1/4 to 1/3 of a turn up and down. Adjusting the cap would change when the points opened, thus would alter the timing. All the way up to shut tractor off (I think it adjusted the spark to a point that the tractor wouldn't run), part way down to start (with the aid of the impulse would retard spark so tractor wouldn't kick), and all the way down for the run position (if timed right, the timing should be just a little before TDC at this stage).

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