Posted by Bob M on January 10, 2011 at 13:48:08 from (67.240.171.41):
In Reply to: Farmall M Rough Idle posted by Jim R on January 10, 2011 at 13:11:54:
Jim - A well-tuned M should idle smoothly down to 400 RPM and even lower - ie. delightfully slow(!)
Keep in mind the carb idle MIXTURE jet screw does just that. You adjust it to where the engine runs smoothest at idle. You then adjust the idle RPM using the idle STOP screw, then go back and tweak the idle MIXTURE screw again if necessary to give the smoothest idle.
Now if turning the idle screw out (CCW) to the point it does not lower the idle RPMs and idle RPMs are still too high, it could be there's a vacuum leak between the carb and manifold flange or between the manifold and the head. More likely however is the governor to carb throttle shaft linkage is not properly synchronized. You'll need to re-synchronize it in order to achieve a nice, slow idle.
Do a search on this forum for a detailed Farmall H/M carb synchronizing procedure - it's been posted several times here.
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 ]
Today's Featured Article - Farmall 460: That's My Girl - by LeAnn R. Ralph. How many sounds can you think of that are as familiar to you as your own breathing? What about the hum of your refrigerator? Or the thump of your clothes dryer? Maybe the engine of your car? You hear those sounds every day, and you don't think much about them, do you. I can think of a few common, ordinary sounds in my daily life, too.
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
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.
