Farm Equipment - D12 Carb

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D12 Carb

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=51952
Printed Date: 31 Oct 2025 at 6:35am
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Topic: D12 Carb

Posted By: BrianC,Ont
Subject: D12 Carb
Date Posted: 11 Jun 2012 at 9:12pm

Had to take the carb off of the D12 tonight. It seemed to be running lean, and wouldnt run unless the choke was almost closed. I tightened the manifold bolts and not any better. When I took the carb apart the high speed jet was fully plugged with rust. It has 2 numbers on the brass tag 235975 and 12740. Which is the carb #, and what model would it be.

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35WC on steel, B with belly mower, D17 puller, D15 Series II puller, D15 Series II with loader, 608 Lawn Tractor

Replies:

Posted By: stu(ON)
Date Posted: 11 Jun 2012 at 9:36pm

Looks like that number might be 12749

http://www.thecarburetorshop.com/Tracallischalmers.htm" rel="nofollow - http://www.thecarburetorshop.com/Tracallischalmers.htm

Posted By: Chalmersbob
Date Posted: 11 Jun 2012 at 10:07pm

you only need to know if it's Zenith or Marvel.

Get a gasket, clean the jet and reassemble it. Bob