Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo Auction Link (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Farmall & IHC Tractors Discussion Forum
:

M idle, carb prob??

Welcome Guest, Log in or Register
Author 
Chris Willy

12-15-2005 16:16:22




Report to Moderator

I recently got an old M running that had been sitting for probably 15 years. At the time the governor was bad and would just race the motor, so I found a different one and put that on. I also had to take the carb apart because it was all full of crap after sitting that long, I put a kit in it and it for some reason doesn"t want to idle nice and smooth. If I idle it down to far it"ll die, and when it is just sitting running the RPM"s will surge up and down. Also when i am driving the tractor it acts like the governor might be not quite adjusted right, it"ll pull down and then after a few seconds it"ll race forward like it shoudl do right away once you let out the clutch. Any help would be appreciated. Sorry bout the long post. Thanks guys

[Log in to Reply]   [No Email]
Haas

12-16-2005 07:08:10




Report to Moderator
 Re: M idle, carb prob?? in reply to Chris Willy, 12-15-2005 16:16:22  
I guess you are aware that on the M carburetor to make the idle mixture richer, you turn the idle screw clockwise, or in. To lean it out, you turn the screw out.



[Log in to Reply]  [No Email]
captaink

12-15-2005 16:22:22




Report to Moderator
 Re: M idle, carb prob?? in reply to Chris Willy, 12-15-2005 16:16:22  
Sounds like there may be several things going on. First, I think the idle passage in the carburetor is plugged with something which is preventing the idle fuel circuit in the carburetor from providing the correct mixture. Look here first, then if you get it to idle, but the engine speed still won’t remain constant the governor may need new springs, weights, and/or pins to work correctly.



[Log in to Reply]  [No Email]
Chris Willy

12-15-2005 16:56:43




Report to Moderator
 Re: M idle, carb prob?? in reply to captaink, 12-15-2005 16:22:22  
Could you tell me exaclty where that port is at? I"m not sure if i know exactly what passage you are talking about. Thanks.



[Log in to Reply]  [No Email]
riverbend

12-16-2005 04:54:08




Report to Moderator
 Re: M idle, carb prob?? in reply to Chris Willy, 12-15-2005 16:56:43  
The idle circuit passage runs from the slot by the throttle plate, down to the idle fuel jet, along a cut-out in the cover gasket, down the well refill bleed, to the point where the idle air screw comes out behind the venturi.

The IH or IT service manuals both show this. The IH manual has a better discription of how the various circuits work in the carb. Both manuals are readily available.



[Log in to Reply]  [No Email]
riverbend

12-16-2005 05:05:28




Report to Moderator
 correction in reply to riverbend, 12-16-2005 04:54:08  
I was looking at the drawing for an H carb. The M is similar, but has a drilled passage between the idle fuel jet and the main air bleed / idle air needle.



[Log in to Reply]  [No Email]
Chris Willy

12-16-2005 06:36:15




Report to Moderator
 Re: correction in reply to riverbend, 12-16-2005 05:05:28  
Thanks riverbend, I"ll have to check that out.

Chris



[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


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. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 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