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Farmall & IHC Tractors Discussion Forum
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Timing an F-4 Magneto to an F-12.

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Moseed

08-23-2004 07:04:29




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Is there a discription of how to time the mag to the motor that is more clear than the instructions in the manual for an F-12? The instructions say to lift the pawl with a wire through the oil cup. Is this so the rotor can be moved clockwise from the coupler side? If I get the distributor gear to the number one position by going counter clockwise (from the coupling side)will it be mistimed? The instructions say to lift pawl and turn clockwise from the coupling side. I have two proffessionaly rebuilt F-4 mags.One is different (from the coupling side)than the other. One is like the picture in the manual (wire access throgh the oil cup to the pawl)while the other does not have the same type of set up. The oil cup is there but the pawl is not accessible. I figured perhaps someone has taken the time to break the process down so idiots like me can understand. Thanks for any help you can provide.

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Karl O

08-23-2004 12:29:56




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 Re: Timing an F-4 Magneto to an F-12. in reply to Moseed, 08-23-2004 07:04:29  
Regardless of the impulse cover style, what you're really doing is defeating the impulse mechanism, which wants to retard the spark. You can accomplish the same thing by turning the magneto backwards (counterclockwise looking at drive end) or by holding the magneto upside down and turning it in the normal direction.

If you give me your email address, I'll send you the full procedure...

Karl

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Nebraska Cowman

08-23-2004 11:32:44




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 Re: Timing an F-4 Magneto to an F-12. in reply to Moseed, 08-23-2004 07:04:29  
the lifting the pawl w wire instruction is for the old style. the newer style has a little lever to lift. This is so the implulse is not engaging while you are trying to time.



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