Farm Equipment - WD Magneto with external coil?

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WD Magneto with external coil?

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=201140
Printed Date: 28 Nov 2024 at 4:39am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: WD Magneto with external coil?

Posted By: ForgivenCreation
Subject: WD Magneto with external coil?
Date Posted: 01 May 2024 at 9:02pm

Figure I would run this by yall before I try it. The Magneto is toast and will not spark at low rpm to get the engine to fire. Even with the plug gap set to 10 thousandths. The top ear is broke off and jb welded, one screw is stripped and the internal coil has one of the screws seized and will not come out.
Can I use the housing Only for Points and Condensor to fire an external Canister Coil?
I do have a battery.

Replies:

Posted By: steve(ill)
Date Posted: 01 May 2024 at 9:18pm

It has been done before.. I would not do it... Have seen a you tube video somewhere someone did it.. Drill a hole thru the case and run wire thru it.....

Dont sound like a long term fix, but it will work.

Dont know if your impulse works.. Will you have any spark advance...half of "old mag failures" are due to a bad Condenser.... lots of questions on that old mag.

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Like them all, but love the "B"s.

Posted By: steve(ill)
Date Posted: 01 May 2024 at 9:19pm

https://www.youtube.com/watch?v=hT67fv8BNS8&t=54s%20" rel="nofollow - https://www.youtube.com/watch?v=hT67fv8BNS8&t=54s

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Like them all, but love the "B"s.

Posted By: ForgivenCreation
Date Posted: 01 May 2024 at 9:32pm

I did test the condensor and it seems to be working. I did the ohm reading deal and it went up slowly and didn't spike. Also super duper cleaned the points, set the gap to 20 thousandths and tested continuity all checked out.
Maybe someday I will try and fix it but it's really rough.

Posted By: Les Kerf
Date Posted: 01 May 2024 at 10:18pm

I have done it, works fine long term.

Posted By: Steve in NJ
Date Posted: 02 May 2024 at 8:11am

Fix it right or save your sheckles and swap it over to a Distributor. Doing things half a$$ doesn't last to long and you're throwing good dough away. People who are cheap, wind up spending twice the money for the fix in the long run. Seen it happen over n' over... JMHO

Steve@B&B

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39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife

Posted By: ac fleet
Date Posted: 03 May 2024 at 10:52am

change over to battery dist and never look back!! Expensive? yes BUT them old mags are junk from the word go! I modified several over the years just to get by on but the internals are still worn out and a good dist will make them run like new!

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http://machinebuildersnetwork.com/

Posted By: Les Kerf
Date Posted: 03 May 2024 at 1:17pm

If the magneto is mechanically worn out and is converted into a distributor then it will function just like a worn out distributor.

If the magneto is in acceptable mechanical condition but electrically dead, then converting it into a distributor is a whole bunch less expensive than buying a re-conditioned distributor and will last just as long. My neighbor (now deceased) converted a John Deere "A" more than 50 years ago, his son still has it and will likely never wear it out either.

If you do purchase a re-conditioned distributor kit be sure that the vendor doesn't supply a coil that has cheapo steel/iron secondary terminals like the one I paid good money for; it rusted so badly within a year that it failed to function. I didn't think I would be "throwing good dough away" by dealing with that vendor, but I did "wind up spending twice the money for the fix in the long run" when I put a Bosch Blue Coil (with brass terminals) on it. Oh, and the condenser failed within six months too.

Let the buyer beware.