Farm Equipment - 38 B magneto

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38 B magneto

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=49480
Printed Date: 22 Aug 2025 at 2:12pm
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Topic: 38 B magneto

Posted By: fixer1958
Subject: 38 B magneto
Date Posted: 23 Apr 2012 at 4:34pm

I have a friend that has a 38 B and he thinks there is a problem with the mag.

No start and am assuming no spark. I know nothing about them.

What would be a good approach to checking it out?

I know it sounds kind of vague but that is all I have right now.

Any ideas?

Replies:

Posted By: MNLonnie
Date Posted: 23 Apr 2012 at 5:37pm

First have to find out for sure if there is spark or not. How good of friend, have him hold a plug wire while you crank it. Or you can just pull a plug wire off, stick a screw driver in the cap and hold it an 1/8" or so off of the plug and see if it jumps a spark when it comes around.

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Waukesha B, B, IB, G, styled WF, D15, 615 backhoe, 2-Oliver OC3's, 4 Ford Model T's, 3 Model A Fords, AV8 Coupe, AV8 Roadster, 1933 Ford Wrecker

Posted By: Steve in NJ
Date Posted: 24 Apr 2012 at 6:18am

We offer parts, service, and rebuilding. Drop us a line if interested....

mailto:Steve@B&B" rel="nofollow - Steve@B&B

Posted By: B26240
Date Posted: 24 Apr 2012 at 7:28am

Mags are sort of a special breed, was a time lots of guys knew enough to get them to work. about all I can do is change points. My sugestion is to first see if you have spark as Lonnie said -- if not send it to Steve to fix it- he is a good guy and you can trust him to do good work!!

Posted By: Chalmersbob
Date Posted: 24 Apr 2012 at 10:00pm

If you don't have spark, clean the points. Drag a paper match stick through them a few times. They get a film on them from sitting. Bob