Farm Equipment - What engine do I have?

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What engine do I have?

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=7695
Printed Date: 04 Nov 2025 at 3:03am
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Topic: What engine do I have?

Posted By: FRANKO
Subject: What engine do I have?
Date Posted: 06 Feb 2010 at 12:10pm

I purchased a power unit advertized as a W25. That should have a WC block. This block is not WC. The unit has the 45 degree exhaust manifold, small carburetor, and older magneto correct for an early WC but the engine has a 4 inch high head with relieved spark plug holes making the plugs more accessable. The block does not have the mounting for the by-pass oil filter, has a pad for a fuel pump, no valve access cover on the magneto side, and a rather large buldge from the camshaft down toward the pan. It also has a boss in the casting, not machined out, that looks like it is for a distributor. It has a 4 bolt pattern above right that looks like the spot for mounting the coil on a D17 motor. I cannot read the serial number but it looks like the last digit may be a G. Can anyone identify this engine? Thank you.

Frank O.

Replies:

Posted By: MikeB (SD)
Date Posted: 06 Feb 2010 at 12:22pm

Check for the block casting number in raised letters below the magneto on the right

hand side of the block. It should say U3019-31 or AM3825-7 or something like that.

Posted By: CTuckerNWIL
Date Posted: 06 Feb 2010 at 12:27pm

Sounds like a Leroi engine I saw in a drag line once. It might have Leroi stamped on the rear flange.

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Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF