Farm Equipment - magneto on a b allis

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magneto on a b allis

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=38958
Printed Date: 23 Sep 2025 at 3:16pm
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Topic: magneto on a b allis

Posted By: ewbs79
Subject: magneto on a b allis
Date Posted: 15 Oct 2011 at 12:53am

Ok I feel kind of dumb. Can someone explain a fmb4 magneto to me. I can't get spark across a plug. It will shock my wife hehe talked her into that twice lol. If I turn the tractor over with hand crank with no plugs in u can see and hear the mag snap and points make a great blue spark but if turned over fast very little spark. The spark on the wires is good with the slow turn over but weak turning over faster too. Thinking about a distributor just cause I know how to work on them. But don't want to scare up 150 bucks just yet

Replies:

Posted By: CTuckerNWIL
Date Posted: 15 Oct 2011 at 7:41am

I have never heard of that B4. I'm not a mag expert, but if you have the magnetism to cause the spark and all other things, point gap, condenser, coil, etc, I don't know what could change by spinning it faster unless it has something to do with the impulse drive.

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