Farm Equipment - Magneto for B Switch Hookup

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Magneto for B Switch Hookup

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=20478
Printed Date: 10 Feb 2025 at 8:37am
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Topic: Magneto for B Switch Hookup

Posted By: Fred
Subject: Magneto for B Switch Hookup
Date Posted: 07 Nov 2010 at 9:09am

My1952 B has a WICO Magneto and it was on there when I bought it. It was hooked up to a key switch which the key was rusted in the switch, wiring was a God awful mess. More tape and wire nuts that the average electrician carrys in his truck.

I bought a new on-off key switch such as found on pg. 29 of the Steiner's catalog p/n ABC065. My question is does this have to be wired so you ground the magneto to turn it on?

Since I am not doing any other wiring, no lights, no charging system, just the starter, positive ground.

Did I mention that I didn't try to start it since I put the magneto back on, hope I did it right, after painting the tractor since it's still sitting on jack stands. I haven't put water in the new radiator to test for leaks yet either.

Thanks for any comments.

Replies:

Posted By: DaveKamp
Date Posted: 07 Nov 2010 at 9:14am

You ground the magneto to KILL the ignition. Run is open circuit... and the wisest thing to do, in the case of the mess... is to pull a new wire from the mag to the keyswitch, and also a good ground wire from the block to the keyswitch. Failure to do so will likely grant you a failure to start, or an intermittant run problem, or missing... or best yet, a nasty shock when you reach for the switch.

Posted By: norm[ind]
Date Posted: 07 Nov 2010 at 9:33am

trac tor originally had a on-off magneto [push-pull] switch all it needed was a good ground to tractor 1 wire to magneto only we have those 1-800-254-3116