Farm Equipment - magneto spark

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magneto spark

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=129287
Printed Date: 28 May 2025 at 10:40pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: magneto spark

Posted By: Sam T-Ga
Subject: magneto spark
Date Posted: 27 Sep 2016 at 3:46pm

Should a magneto spark turning by hand on bench? or does it need to turn faster?

Replies:

Posted By: DaveSB
Date Posted: 27 Sep 2016 at 3:51pm

Mine will spark when turning it by hand. They came out on a lot of hand crank engines, so they should spark even when just turned slowly. If the impulse is working.

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1948 C, 1953 CA, 1948 WD, 1961 D-17 Series 2 Diesel, 1939 WC, 1957 D14

Posted By: Sam T-Ga
Date Posted: 27 Sep 2016 at 4:00pm

That's what figured. This is my first mag rebuild. I replaced coil, condenser, points and insulated wire from points to condenser. I don't get any spark on coil wire against mag housing when turned by hand. I'll take apart again and check everything again.

Posted By: Gerald J.
Date Posted: 27 Sep 2016 at 4:02pm

It should turn hard then snap and make the spark. If not the impulse isn't working.

Gerald J.

Posted By: Matt (Jordan,MN)
Date Posted: 27 Sep 2016 at 5:00pm

What's the make and model of the magneto your working on?

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Owner of Matt Scott LLC
Specializing in NOS and used Allis Chalmers tractor & implement parts & liturature and Magneto Repair
http://www.mattscottllc.com/

Posted By: Hubnut
Date Posted: 27 Sep 2016 at 8:05pm

Remember, only one plug will fire on each turn. Not all will fire.

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1940 B "Lucy"
1941 B w/ Woods L59 "Flavia"
1942 B w/ finish mower "Dick"
1941 C w/ 3-point "Maggie"
1947 C SFW w/ L306 "Trixie"
1972 314H