Farm Equipment - Mag help

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Mag help

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=46358
Printed Date: 04 Sep 2025 at 12:05am
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Topic: Mag help

Posted By: Joe(OH)
Subject: Mag help
Date Posted: 27 Feb 2012 at 10:00pm

I need a little advise on the magneto on my M. I have spark for number 1 and 4 but not for 2 or 3. I took the cover off, cleaned it up, put it back and still nothing. I forgot to write down the number on the mag, but I will get it tomorrow.

Thanks,

Joe

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Life is simpler when you plow around the stump.

Replies:

Posted By: Glockhead SWMI
Date Posted: 28 Feb 2012 at 5:07am

most likely cap or wires. possibly plugs.

Posted By: Steve in NJ
Date Posted: 28 Feb 2012 at 6:04am

Probably an H4 Mag. That problem could be as simple as a bad plug or two. Do a continuity test on the wires and make sure the wires are okay. Hairline crack across the end cap from opposite terminals would cause a misfire on two cylinders also. Might need a magnafing glass to find the crack in the cap unless the tracking is evedent. Moisture under the cap can also cause that problem. HTH

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

Posted By: Joe(OH)
Date Posted: 28 Feb 2012 at 3:05pm

The mag is an American Bosch MRF 4 A 322. Can parts still be found for these?

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Life is simpler when you plow around the stump.

Posted By: Glockhead SWMI
Date Posted: 28 Feb 2012 at 3:20pm

http://www.magnetoparts.com/cat_index.htm