Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 
Marketplace
Classified Ads
Photo Ads
Tractor Parts
Salvage

Community
Discussion Forums
Project Journals
Your Stories
Events Calendar
Hauling Schedule

Galleries
Tractor Photos
Implement Photos
Vintage Photos
Help Identify
Parts & Pieces
Stuck & Troubled
Vintage Ads
Community Album
Photo Ad Archives

Research & Info
Articles
Tractor Registry
Tip of the Day
Safety Cartoons
Tractor Values
Serial Numbers
Tune-Up Guide
Paint Codes
List Prices
Production Nbrs
Tune-Up Specs
Torque Values
3-Point Specs
Glossary

Miscellaneous
Tractor Games
Just For Kids
Virtual Show
Museum Guide
Memorial Page
Feedback Form

Yesterday's Tractors Facebook Page

  
Tractor Talk Discussion Board

Re: TO 20 runs only on full choke


[ Expand ] [ View Replies ] [ Add a Reply ] [ Return to Forum ]

Posted by Steve@Advance on March 28, 2020 at 09:29:41 from (66.169.147.211):

In Reply to: TO 20 runs only on full choke posted by mikepara on March 28, 2020 at 07:09:21:

The most likely cause is gummed up carb from sitting with dried up ethanol gas in the bowl.

But before blaming the fuel system entirely, do some other basic checks. Be sure the ignition system is up to par. There should be a minimum 1/4" spark to ground at each plug wire, at the plug end. Check the points condition and gap, check the distributor shaft for side play, check the centrifugal advance, the rotor should turn a few degrees CCW and spring back when released.

There is a drain plug in the bottom of the carb bowl. With the engine off, fuel valve open, get a clean glass, remove the plug and catch the flow of gas.

It should have a steady flow, and continue to flow as the bowl empties out. If it slows to a drip, or stops flowing, there is a restriction.

Could be the float stuck, the screen at the fuel inlet elbow of the carb, or a restriction at the screen in the sediment bowl or inside the tank.

Try taking the line off at the carb, see if there is flow there, trace the problem toward the tank until you find the restriction.

Look at what was caught in the glass (if anything). If it is dirty, cloudy,water on the bottom, the tank is contaminated. The same will be inside the carb.

The first thing will be removing and cleaning the tank. Unless that has already been done, very good chance the tank is full of rust and whatever collects over the years. Also a good chance cleaning it will result in it leaking, so be prepared, it may be time for a new tank.

Once you establish a good flow through the carb, try again, see if it will run. If not, try backing the main jet adjusting screw (the larger screw) out 1/4 turn at a time, trying to get it to run without choke. When properly adjusted it will take full and sudden throttle without hesitation.

If it won't adjust out, the carb may need to come apart and be cleaned. Don't be afraid of it! They are very simple, designed for field service by the novice owner. Many times it can be eased apart, cleaned and reassembled without needing anything. If it's in bad shape, a repair kit can be bought on this site. Youtube is a valuable source for how to information. Work over a clean solid surface so nothing gets lost.

Check the air cleaner. There is a wire mesh inside the canister that is often overlooked. It will get packed with dirt and have to come out and be cleaned or replaced. Not easy, but doable.

If still having doubt, a compression test will be in order. A sick engine will never run right, everything works together for satisfactory performance.

Do some of these tests, let us know...


Replies:




Add a Reply!
You must be Logged In to Post


:
:
:

:

:

:

:

:

:

Advanced Posting Options

: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.

No political comments, hate speech or bigotry of any kind will be tolerated. Violations will be removed and posting privileges may be permanently revoked without notice.



 
Advanced Posting Tools
  Select Gallery Photo  Attach Serial No List 
Return to Post 
Upload Photos/Videos
Upload one or more videos to your post. Photo and video filesizes should be less than 5MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.

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


Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point ... [Read Article]

Latest Ad: John Deere B 1943 [More Ads]

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