(800) 853-2651
SHOP NOW

M Carb Question

A

Anvilheadtexas

Member
I need some advice from the experts on a troubled M carb. I purchased a re-build kit and in it is what I believe to be a replacement main jet. What I am referring to is a brass/gold jet that is slotted on one end and has threads on the other. It is about 11/16 of an inch long. Is this the main jet replacement and....if so....how does one go about removing the existing main jet (is is not slotted). I have an E12 carb.

If not the main jet, where does this go?

I am having big problems with my carb. I ran through all jets and they are not clogged. Since I have her apart, I figured I would rebuild.
 
Sounds like the idle metering jet. If you hold the bottom part of carburetor with the choke end toward your body. Look at the gasket surface on opisite side of big middle air intake hole from you. There is 2 holes, one will have a insert with a small hole in middle. Thats the air bleed. beside this hole is where the idle jet goes. If its not broke off or missing it should stick up above the surface 7/16 or so. It screws in the hole, be gentle with it. If yours is broke or missing thats one problem with the carburetor.
 

I think D Slater has you covered but here is drawing anyway.
Farmall_E12_carb.jpg
 
D - thank you. I went and found some good pics on the Internet and figured out that what I had in my hand was the idle jet. Why did I not figure it out when I took it apart???? Surprise...there was NO idle installed! I was wondering why that hole was threaded. Anyway, do you think a missing idle jet contributed to my problems. Hope so, now that it is installed.

But back to the original question - can the main jet be replaced?
 
Yes, In the picture JMOR was kind enough to post its item # 46. Item # 30 is the nut holding it in. It has a screw driver slot in nut near drain hole for bowl. Information is for a original M carburetor #, if it was switched to another carburetor sometime it may not have a nut on bottom.
 
Didn't answer all of question. Don't know or remember what problem you were having, but yes the missing jet would be a problem.
 
You must log in or register to reply here.

Similar threads

O
International 140 carb questions
Replies
1
Views
299
Jim Becker
J
D
Farmall M Intake Preheater: Carb Icing
2
Replies
21
Views
878
gene bender
G
G
MS TSX 706 Carb update
Replies
13
Views
831
GlenIdaho
G
M
TO-20 TSX361 carb questions
Replies
11
Views
746
Mad Farmer
M
M
Ford 861 Carb Tuning
Replies
6
Views
299
mcashatt
M
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top