Allis Chalmers C Carburetor Issues
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=195744
Printed Date: 28 Apr 2025 at 2:06am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Allis Chalmers C Carburetor Issues
Posted By: pcheffernan
Subject: Allis Chalmers C Carburetor Issues
Date Posted: 18 Jun 2023 at 6:55pm
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Recently bought a 1944 Allis Chalmers Model C narrow wheel tractor
with a Woods L59 belly mower. Tractor needs 1/4 to 1/2 choke to run
correctly. I figured it had an air leak or carburetor needing rebuilt
so decided to take care of it. When I removed the carburetor I noticed
it had 2 different mounting bolts. The front had a typical 5/16-18 bolt
that threaded into the carburetor flange, the aft bolt was much smaller
with a nut on the bottom side. Never thought much about it since I was
going to replace all the hardware anyway. I rebuilt the carburetor,
attempted to test fit it today and noticed I could not get the second
bolt installed, it was off 1/2 hole. I removed the carburetor,
 measured
the mounting flange center to center at 2.50 inch. I measured the intake
manifold center to center and it was 2.25 inch. WTF!!! No wonder this
thing ran like crap. When I rebuilt the carburetor, the rebuild
instructions show a cap, not an air screw adjustment for the main jet.
I'm assuming someone replaced this carburetor with something else,
however I'm not positive on this. It is a Zenith carburetor. The numbers
the top is 213348 and 9707R. I see a 3B stamped on the side of the
float bowl. Any help is appreciated. This tractor has been
Frankensteined by previous owners. I have many issues to deal with.    |
Replies:
Posted By: steve(ill)
Date Posted: 18 Jun 2023 at 10:51pm
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A 9707 is off a WC tractor.... Have seen that before... You may have to change the throat tube to smaller ... and change a jet to get it to run right.......... When you "CHOKE" it, you are cutting down on the air because the VENTURI is too large of diameter for a 125 cid engine (WC was 201 ) I dont remember exactly, but im thinking on the B or C version, the venturi is about 9/16 or 5/8 inch bore ?? ......... see what yours measures.
 ------------- Like them all, but love the "B"s. |
Posted By: steve(ill)
Date Posted: 18 Jun 2023 at 10:56pm
from .."thecarburetorshop.com" ............. ------------- Like them all, but love the "B"s. |
Posted By: pcheffernan
Date Posted: 19 Jun 2023 at 7:23am
| Thank you very much for the response. I asked the previous owner about maintenance and he told me absolutely nothing. I will be replacing the carburetor with the proper one for this tractor and resell this 9707 in the future. I appreciate your help. |
Posted By: Steve in NJ
Date Posted: 19 Jun 2023 at 9:31am
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Some of the popular B/C Zenith Carburetors are the 212844, 212845, 216937,224641,225621 or 622. The popular Marvel Schebler Carburetors would be a TSX 154, TSX-305, TSX 470. The CA Carb usually was a TSX-486, or the popular TSX670. All should fit the B,C,CA manifold. As Steve mentioned, that 9707 fits the WC, and WD equipped with the 201 engine...... HTH Steve@B&B ------------- 39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife |