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Case Tractors Discussion Forum
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Case SC Magneto internal setting

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OldIron

09-12-2007 10:17:00




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Hello

I tore apart my old, and massively stuck, corroded and filthy Case brand magneto, and of course, didn"t notice the setting indicator for the internal timing. I know, stupid me...

Does anyone have the manual for this setting?
I am guessing, from other posts, that it is called the "lag angle" setting. Also, the spark gap would be appreciated. I cannot find my service manual, though I know I have it somewhere...

There may have been a data plate on there at one time, but the only number(s) on the mag are embossed on the mounting flange:
4 J/M 82383, which I"m guessing to be a serial #.
There are two phenolic pieces, one for the ignition wires, and the other, which has the Case emblem.

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dobber

09-13-2007 13:41:03




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 Re: Case SC Magneto internal setting in reply to OldIron, 09-12-2007 10:17:00  
You have a Case 4JMA flange mount mag. The impulse stop ring sets with mark on 25� for S & D series tractors on gasoline and 15� for V series. The beveled teeth on fibre gear on dist rotor should be facing towards rotor. Those align with the dot on steel gear to time dist rotor. Points setting will vary due to wear on contacts, cam and breaker bar but usually .015" - .018". May have to change it some to where you have good hot blue spark off coil. Case mag manual says set points at .011"-.020". Walt has done a super job of posting the Case mag manual online and this link takes you to it.

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OldIron

09-13-2007 17:14:47




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 Re: Case SC Magneto internal setting in reply to dobber, 09-13-2007 13:41:03  
Amazing
I just guessed, and I set it to 25!
What the heck are the odds I'd get it right!!!
Thanks for the info.
Still can't find the service manual, though I found the operators manual and the parts manual... Of course, never the one you need...
Thanks again for the info.
OldIron



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