Re: Missing F-20 - - Wednesday update

Posted by Jeb2N on June 23, 2004 at 05:01:52 from (65.40.234.137):

In Reply to: Missing F-20 - - Wednesday update posted by Pete L on June 16, 2004 at 19:33:52:

Hey Pete;

I've never disected a tractor magneto, but i've worked on a few hit and miss engines and I have rebuilt distributors. My question is this: Doesn't the F-20 and the other F-series tractors need the "spark advance/retard" lever in order to adjust the timing for various RPM's? Again, i'm not sure if the mag is internally advanced, but i've seen a whole bunch of F-series tractors that were missing the spark advance lever.

Theoretically, you could have the mag set perfectly but it would be timed for a set RPM and therefore would run best at that specific RPM and progressively worse the further you went away from it.

Could it be that your mag is properly set but for a full load RPM and the lack of spark advance is making it run too advanced for the low speeds? I kid you not, this answer came to me in a dream last night and I had to share it. Just my thoughts on a possible fix.

Jeb

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