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

Discussion Forum
:

460 Farmall carburetor tuning

Welcome Guest, Log in or Register
Author 
CtryBoyInMT

05-19-2008 14:55:40




Report to Moderator

Can anyone tell when what each of the adjustment screws are for? Also do you have a solution for the wandering idle problem?

The carburetor was shooting gas out the overflow hole from a stuck float. So I took the carb off and put in a new needle/seat and float along with new gaskets. Then as I was setting the carb, the idle wanders. Also it full throttle it coughs and can hardly even sustain PTO rpm. My first thought was vacuum leak at the carb base, but I resealed it with Permatex along with the gasket. Then I thought it was fuel starved, so I made sure the bowl was full of fuel. No fuel flow problems (To the carb and into the bowl anyway).
The most unusual thing is that it will run and pull a load fine with the choke ¼ of the way out. I ran what I believe is the mixture (bottom of float bowl) screw out and it never smoothed out. In fact, I ran it all the way out to where gas was starting to drip past and it still never ran rich. The plugs are pure white from being lean. I then sprayed carb cleaner all around the carb, carb gasket and manifold gasket. If it is leaking from any gasket, I can't find where. Any Ideas?

I am totally stumped!!

[Log in to Reply]   [No Email]
CtryBoyInMT

05-21-2008 15:07:28




Report to Moderator
 Re: 460 Farmall carburetor tuning in reply to CtryBoyInMT, 05-19-2008 14:55:40  
Sorry It took a few days to get back here. Still plagued with this problem.

CNKS (your not from Kansas by chance?), I didn't mention as I thought it was already implied, but I did soak the carb (It wasn't overnight but it was for several hours) and blew out the orifices, both with carb cleaner and air. Their didn't seem to be any blockage. Also I only applied a very thin layer of permatex to the carb/manifold gasket just to alleviate any suspicion of warping.
My followup question is setting the float. I didn't specifically see any adjustment, short of bending the float frame itself. How do you go about adjusting the float height?

[Log in to Reply]  [No Email]
CNKS

05-19-2008 17:21:09




Report to Moderator
 Re: 460 Farmall carburetor tuning in reply to CtryBoyInMT, 05-19-2008 14:55:40  
Your carb needs to be cleaned and the float adjusted properly. By cleaning I mean soak in in carb cleaner overnight and blow it out with compressed air. Otherwise your new parts will do no good. You have found the main jet. Max power is 5 turns out, will probably run with 3-3.5 out. The screw can be turned in if you do not need max power. Otherwise it is a "fixed" jet, and "adjustment" does not affect the way the engine runs unless you turn it in too far. The other 2 screws are idle mixture and idle speed. Look closely at them and you can tell which is which. The gaskets do not need any kind of sealer, more harm than good if the sealer gets in the carb. You could also have a governor problem or a leak in the intake manifold.

[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