Yesterday's Tractor Co.
Shop Now View Cart
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
Classified Ads
Photo Ads
Tractor Parts

Discussion Forums
Project Journals
Tractor Town
Your Stories
Show & Pull Guide
Events Calendar
Hauling Schedule

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

Research & Info
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

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

Yesterday's Tractors Facebook Page

Related Sites
Tractor Shed
Ford 8N/9N Club
Today's Tractors
Garden Tractors
Classic Trucks
Kountry Life

Farmall & IHC Tractors Discussion Board

Cub still not running well...

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

Posted by Beargap on November 01, 2012 at 13:49:47 from (

Thanks for the several suggestions on how to fix the old Cub. Here"s what I have done. Recall it was running fine until taken to a shop to replace a busted throwout bearing. Since returning it doesn"t run well enough to be used for anything:

1. Pulled and inspected the plugs - all had a grayish deposit around the electrode, but looked clean, dry, and free of oil. The distributor cap and rotor are new as are all the plug wires. The coil, points and both condensors were replaced with the plugs last Spring and it ran fine through the summer.

2. Verified firing order as 1,3,4,2 with 1 being at the 1:00 position looking at the distributor

3. Pulled the carb apart and inspected it. No dirt in the inlet screen and nothing observed inside. Cleaned with some spray carb cleaner to verify openings were clear. Loosened the main metering jet from outside and verified fuel is flowing out the drip hole.

4. Checked the air cleaner, which was a little low on oil but otherwise OK.

5. Started and observed that after warming up a bit it will run very smoothly, but only at a low idle. Advancing the throttle immediately results in (brrp brrp pop pop brrp) missing and poor running, almost killing the engine. Advancing slowly seems to allow it to speed up better, but still seems to miss a bit periodically or a lot under even a light load.

6. Adjustments to the idle screw have little effect, so I left it about 1 1/2 turns unscrewed.

7. Pulled the sediment bowl and everything appears clean. Reinstalled it and opened the valve, and pulled the fuel line off the carb and verified fuel runs freely through the hose.

Could this be a problem with the governor? Is there an advance mechanism in that housing? This has a 12v conversion and I have never touched the timing or opened the governor in 20 years...just set point gaps by feeler gauge when doing a tune up. It almost always is used at just about full throttle and had been running well this summer, with an occasional stumble when pulling a load and turning uphill while the regulator catches up. I appreciate the advice as it is not usable at the moment.


Add a Reply



Optional Link URL:
Link Title:
Optional Image URL:
Optional Video Title:
Optional Video Embed:

Advanced Posting Options

Email Notification: 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.

Advanced Posting Tools
  Upload Photo  Select Gallery Photo  Attach Serial # List 
Return to Post 

Fast Shipping!  Most of our stocked parts ship within 24 hours (M-Th). Expedited shipping available, just call! Most prices for parts and manuals are below our competitors. Compare our super low shipping rates! We have the parts you need to repair your tractor. We are a company you can trust and have generous return policies. Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ About Us ]

Home  |  Forums

Copyright © 1997-2016 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