Tractor is back together after engine change. Engine likes to surge back and forth from low rpm to high rpm. Changed governor but did not help. Governor arm is going back and forth with the loss and gain of rpm. Will settle down and run good at higher throttle setting if you calm the surging by holding the carb shaft. Seems to be loading up and then takes off then compensates for the rpm and backs off again,. Carb seem to be a problem. Idle screw can be screwed totally in and will still run. carb has been rebuilt with a kit. Carb is in great shape but there must be something wrong with it. Have any of you gentlemen out there seen this problem and how did you fix it?
- Thread starter Freddy
- Start date
Janicholson
Well-known Member
It sounds like a flake of trash in the carb, probably the idle circuit. Jim
Allan in NE
Well-known Member
You haven't got the governor synchronized with the carburetor. Anytime you R&R The carb, it has to be re-done.
Promise,
Allan
Promise,
Allan
Allan in NE
Well-known Member
It's kind of a procedure. Have you got the IT Manual? It is in there.
Guarantee you tho, that's the problem.
Carb is trying to pull it to idle while the governor is trying to speed 'er up. So, it "hunts".
Allan
Guarantee you tho, that's the problem.
Carb is trying to pull it to idle while the governor is trying to speed 'er up. So, it "hunts".
Allan
OK, unhook carb link to governor, pull throttle lever to full throttle position. Put carb butterfly in wide open position. Adjust length of rod so they just match. Shorten rod one turn from that so when governor opens up it does not slam throttle shaft in carb against it's stop. (slamming it against it's stop is very hard on the shaft and bushing causing premature wear). Then , when you get it running at a speed where it hunts, screw in that little bolt on lower end of governor housing until hunting quits. A good lively governor will usually hunt just slightly one time when opening throttle from lower speed. If you screw it in too far carb will not idle down. If screwing in does not help, check for broken or loose bumper spring in governor. Lean mixtures or other wise poor tune will also cause hunting.
Mr. Farmall A
Member
Sound like a sticking needle valve, new ones stick like crazy on me.
Similar threads
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