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

Farmall 240 - Engine stumbles after 30 +/- minutes

Welcome Guest, Log in or Register
Author  [Modern View]
Walter60 Farmal

07-29-2014 16:41:05

Report to Moderator

Help. I have replaced coil, points,condenser,rotor,cap,wires and plugs. I have rebuilt the carburetor. I have pulled the head, pistons and sleeves. New pistons,rings,sleeves and had the head done with new valves.It starts easy and runs perfect until.....Thermostat works. Gas is good. Air filter clean. Coil is wired direct from battery with switch to eliminate old wiring issues. I have had and used this tractor for years.Need advice. Thanks

[Log in to Reply]   [No Email]

07-29-2014 18:47:31

Report to Moderator
 Re: Farmall 240 - Engine stumbles after 30 +/- minutes in reply to Walter60 Farmall, 07-29-2014 16:41:05  
Feel the coil when it stumbles. If it is way hot, the issue might be that it is a 12v coil for use with a ballast resistor (which means it is really a 6v coil). If given 12v it can heat and break dowm, causing misfire.
If the coil is warm and not way hot, My guess is fuel related. Put a can under the carb, and drain fuel for at least 2 minutes. If the flow slows down you could be having a blockage at the tank to sediment bowl connection, r in the screen at the carb fitting. The fuel cap has one or two vent holes in the top. Make sure the vents are open. Jim

[Log in to Reply]  [No Email]
Walter60 Farmall

07-31-2014 16:16:05

Report to Moderator
 Re: Farmall 240 - Engine stumbles after 30 +/- minutes in reply to Janicholson, 07-29-2014 18:47:31  
The coil is never hot. Coil is marked 6 volt no external resistor. Good flow from bowl drain. I ran the tractor with the cap loose. Nothing changed.

[Log in to Reply]  [No Email]

08-01-2014 08:51:57

Report to Moderator
 Re: Farmall 240 - Engine stumbles after 30 +/- minutes in reply to Walter60 Farmall, 07-31-2014 16:16:05  
Drain gas out of the bowl for at least 2 minutes into a clean can. It is necessary to let the needle and seat have full flow. If it slows down, the Flow is restricted at some point. One other possible issue is a intake manifold that is cracked or loose on the head and when it gets warm, it pulls away and lets in air. this can be checked with a unlit propane torch used to add fuel to the manifold area and listen for engine smoothing. (must be done when it is stumbling). Jim

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

Hop to:

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