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Tractor Talk Discussion Forum

Timing of the mag on F-20

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Tyler Truman

05-18-2005 18:40:24




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Hi guys I am working on a 1938 Farmall F-20 I do have it running but it does seem like it is laboring I was wondering how to advance the timing while standing in front of the tractor should I turn the governor plate to the left or to the right Thanks!!!!




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Nebraska Cowman

05-18-2005 18:47:59




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 Re: Timing of the mag on F-20 in reply to Tyler Truman, 05-18-2005 18:40:24  
do you know about the advance on the rear of the mag? turn the breaker cover counterclockwise to retard. If that is not enough you can change the timing disk at the coupler end. mark where it is now before you remove the bolts. I always turn them the wrong way even after trying to think which way is right.



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Bob/Ont

05-19-2005 17:27:43




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 Re: Timing of the mag on F-20 in reply to Nebraska Cowman, 05-18-2005 18:47:59  
Cowman, the 10-20 manual says to put a piece of cigaret paper between the points. Have the rotor coming up to #1, engine on #1tdc compression. Rotate the mag drive untill the points let go of the paper then put the two bolts into the coupling where ever the holes line up. I think the cam should be fully retarded for this. Have to make sure the impulse coupling doesn't grab if it's a newer self cocking one.
Later Bob

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