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

Allis Chalmers Discussion Forum

D17 choke

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

11-16-2023 11:54:49

Report to Moderator

I've got a d17 that will only run when fully chocked. What carb adjustment needs to be made?


[Log in to Reply]   [No Email]

11-17-2023 06:58:40

Report to Moderator
 Re: D17 choke in reply to Luke470, 11-16-2023 11:54:49  
First, remove the air intake hose from the carb and inspect the choke butterfly in the carb intake to be sure the choke is on when you think it's on. On a M/S carb, it is possible to have the arm put on upside down so when you pull the choke out the choke is off instead of being on. Found that on a WD45 I bought and couldn't figure out why it wouldn't run after a couple minutes when it warmed up.

[Log in to Reply]  [No Email]
Roger in Iowa

11-16-2023 17:50:36

Report to Moderator
 Re: D17 choke in reply to Luke470, 11-16-2023 11:54:49  
Remove plug in bottom of carb and see if will fill a quart jar with a good stream of gas coming out of opening. If not, check plugged fuel filter or restriction in bottom of fuel tank.

[Log in to Reply]  [No Email]

11-16-2023 13:03:35

Report to Moderator
 Re: D17 choke in reply to Luke470, 11-16-2023 11:54:49  
Theoretically opening up the Main Jet/Load Adjusting Needle/Power Adjusting needle (usually called the Main Jet, but if you have one of many manuals made over the years for the D17 it might be called one of those other names). To adjust, I'd start with 1.5 turns out from stop, then with it running and warm at governed speed, turn in until the RPM just starts to drop, then back out just a smidge. Then run for a while, if it stumbles on acceleration, you may have to keep backing it out (richer) a smidge at a time.

But before you do that, however: An engine that's only running with full choke means it's really leaned out - far more than you'd typically get with a misadjusted carb (unless it's been really tampered with). Usually it's a sign of it sucking air somewhere down-stream of the carb. Check to make sure your carb-to-manifold and manifold-to-block bolts/studs are tight and the gaskets are in-place and looking good. Then look for cracks in the manifold/riser.

[Log in to Reply]  [No Email]

11-16-2023 13:24:10

Report to Moderator
 Re: D17 choke in reply to DanielW, 11-16-2023 13:03:35  
I should also add. Timing issues (especially too advanced) can sometimes mimic carb issues and it will run better with some choke action. Maybe makes sure you're timing's at least close to the right ballpark before going full ham with the fuel system adjustments.

[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