Farm Equipment - (off color sorry) Need Le Roi Mag help

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(off color sorry) Need Le Roi 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=7013
Printed Date: 16 Jan 2025 at 5:53pm
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Topic: (off color sorry) Need Le Roi Mag help

Posted By: Denis in MI
Subject: (off color sorry) Need Le Roi Mag help
Date Posted: 22 Jan 2010 at 9:10pm

We are having trouble with a Le Roi Generator the neighbor has the adjustable drive cup on the WICO mag stripped and caused it to not run so we swapped on a fairbanks off of a wc but can not get it advanced enough. Are these engines different or is the timming gear wrong and that is why it had the adjustable drive cup.

Thanks in advance for any help and sorry for the off color post,

Denis

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1938 B, 1945 B, 1941 IB, 1949 C, 2 1938 WCs, 3 1950 WDs, 1951 WD, 2 1955 WD45, 1957 D-14

Replies:

Posted By: EricTn
Date Posted: 22 Jan 2010 at 9:31pm

I know little about magnetos but this site might help you or someone else here. I'll share info. Seems to me less info sharing since we have private messages now. http://www.magnetoparts.com
hope this helps. Eric

Posted By: Steve in NJ
Date Posted: 23 Jan 2010 at 9:03am

Sounds like a "C" style Wico Mag that's on the LeRoi. You have to be careful swapping over impulse and drive parts from different mfr's. Lag angle comes into view here, and not all Mag and Mag parts are interchangeable. The Wico "C" could be used on quite a few applications with its adjustable lag angle feature, but if the adjustable impulse is bad, you need to replace it with the same type impulse so you can get the engine timing back correctly and know that your drive components are correct. You'll do more damage than good here... HTH
Steve@B&B

Posted By: Denis in MI
Date Posted: 23 Jan 2010 at 10:47am

It is a XH-2500 WICO and we swapped on a Fairbanks Morse FM-J4 of of a WC I figured that the mag should work but now I think that the timing gear is off and that is why they put on a adjustable timing mag. we have it fully advanced and we are about 10 degrees ATDC and we need to be 30 degrees BTDC if we move the wires 1 hole counter clockwise and tilt the mag toward the block to fully retard it would we be in the ball park.

Thanks again,

Denis

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1938 B, 1945 B, 1941 IB, 1949 C, 2 1938 WCs, 3 1950 WDs, 1951 WD, 2 1955 WD45, 1957 D-14

Posted By: R Aiken
Date Posted: 23 Jan 2010 at 11:35am

Move your govener timeing gear a tooth or two whitch ever way to make it right.