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Antique Gas Engine Discussion

Splitdorf Magneto Timing of Fuller & Johnson NA?


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Old 07-16-2005, 12:34:08 AM
Larry K Larry K is offline
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Question Splitdorf Magneto Timing of Fuller & Johnson NA?

My 1923 Splitdorf magneto gear has multiple slashes and dots. How do I time the magneto gear with the idler gear of the 3 hp Fuller & Johnson NA gear?
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Old 07-16-2005, 07:12:37 AM
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Default Re: Splitdorf Magneto Timing of Fuller & Johnson NA?

The correct factory timing mark should be 3 dots marking one tooth on the mag gear. Idler gear will have 3 dots marking two teeth. There should be two more teeth have 2 dots marked on them. These should first be timed to the marked tooth on crank gear. After that is done then do the magneto.

If you can't get it that way here's another easier way. Turn engine until ignitor just snaps then stop. Turn magneto until it "locks in place" from magnetic pull, it will do this twice per revolution. Place mag on bracket until gear teeth are just about to mesh. Turn mag gear 1 tooth to the right and mesh the gears. Carefully tighten the two bolts.

Hook your wire directly to the switch on hopper. No external coil is needed. Run another wire from insulated electrode on ignitor to center post on switch. You're now ready to go.

Cheers NICK
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