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Re: OT - Fairbanks Morse FM Magneto timing
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Posted by Bob on November 07, 2005 at 07:46:29 from (64.21.249.40):
In Reply to: OT - Fairbanks Morse FM Magneto timing posted by Jason Z in MO on November 07, 2005 at 07:26:59:
The Fairbanks mag impulse would not be adjustable for "lag", but the "lag" CAN be changed be changing out the weights. (Lag is the amount by which the starting {when the impulse is operating} timing "lags" behind the running timing.) The weights and/or the hub that carries the weights will be labeled in "degrees lag". It's been a while since I've worked with one of these, and run it on the Allen mag machine, but if I remember correctly, the number is given in degrees the MAG turns, not crankshaft degrees, so if the mag is driven at 1/2 engine speed, the timing, measured at the crankshaft, will advance 2 degrees for every degree of impulse "lag". If the mag runs crankshaft speed, the actual advance will be what the number on the impulse states.
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