Allis Chalmers C Carburetor Issues

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

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. 

	This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
	The Forum	Parts and Services	Unofficial Allis Store	Tractor Shows	Serial Numbers	History

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
pcheffernan Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 29 May 2023 Location: Indiana Points: 13	Post Options Post Reply Quote pcheffernan Report Post Thanks(0) Quote Reply Topic: Allis Chalmers C Carburetor Issues Posted: 18 Jun 2023 at 6:55pm
	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.

Sponsored Links

steve(ill) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 11 Sep 2009 Location: illinois Points: 81440	Post Options Post Reply Quote steve(ill) Report Post Thanks(1) Quote Reply Posted: 18 Jun 2023 at 10:51pm
	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. Edited by steve(ill) - 18 Jun 2023 at 11:16pm
	Like them all, but love the "B"s.

steve(ill) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 11 Sep 2009 Location: illinois Points: 81440	Post Options Post Reply Quote steve(ill) Report Post Thanks(1) Quote Reply Posted: 18 Jun 2023 at 10:56pm
	from .."thecarburetorshop.com" .............
	Like them all, but love the "B"s.

pcheffernan Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 29 May 2023 Location: Indiana Points: 13	Post Options Post Reply Quote pcheffernan Report Post Thanks(0) Quote Reply 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.

Steve in NJ Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Andover, NJ Points: 11833	Post Options Post Reply Quote Steve in NJ Report Post Thanks(0) Quote Reply Posted: 19 Jun 2023 at 9:31am
	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