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internal timing on an FMJ magneto
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Dean(IA) View Drop Down
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Joined: 12 Sep 2009
Location: NE Iowa
Points: 430 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dean(IA) Quote  Post ReplyReply Direct Link To This Post Topic: internal timing on an FMJ magneto
    Posted: 12 Aug 2021 at 9:09am
I guess I am having one of those senior moments.
I had to take the mag apart and file the points.
It is a rebuilt mag that has laid on the shelf for
years. There is no beveled tooth on the drive
gear and no plastic timing disc on the driven gear.
What is the procedure for timing the mag?
Thanks
Dean(IA)
Dean(IA)
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Goose View Drop Down
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Joined: 07 Oct 2009
Location: Melrose, Wis
Points: 2471 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Goose Quote  Post ReplyReply Direct Link To This Post Posted: 12 Aug 2021 at 10:30am
Here you go:
"People are human beings, produced by the society in which they live. You encourage people by seeing the good in them." ~ Nelson Mandela
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Goose View Drop Down
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Joined: 07 Oct 2009
Location: Melrose, Wis
Points: 2471 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Goose Quote  Post ReplyReply Direct Link To This Post Posted: 12 Aug 2021 at 10:33am

It is the fourth tooth to the right of the key.
"People are human beings, produced by the society in which they live. You encourage people by seeing the good in them." ~ Nelson Mandela
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steve(ill) View Drop Down
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Joined: 11 Sep 2009
Location: illinois
Points: 86197 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 12 Aug 2021 at 11:16am
if your missing the "C" plate, this can help,  several photos down from top.
Like them all, but love the "B"s.
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Steve in NJ View Drop Down
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Joined: 12 Sep 2009
Location: Andover, NJ
Points: 11950 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve in NJ Quote  Post ReplyReply Direct Link To This Post Posted: 12 Aug 2021 at 11:36am
If the "C" is unclear on the fiber gear, sometimes a little dab of machine oil rubbed on the gear will make the "C" visible. You can then mark the two teeth with paint or a marking pen so you know where they are next time. Also, some of the "J" series Mags had a "dog ear" tooth on the mainshaft steel gear, some had a pip mark. (dimple)  Also, not a good practice filing points. I know its been done for 100 years but a little spritz of TV tuner cleaner or Brakekleen will remove the oxidation off the points. You don't want to file points because you remove the Cadmium plating that's on them to keep them  corrosion free...  HTH
Steve@B&B 
39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
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