(800) 853-2651
SHOP NOW

1951 B Missfiring under load

G

grampsh1

Member
My B only fires on one cylinder when put under load like climbing a hill in 6th gear at full throttle magneto has new coil points and condenser new spark plugs wires are wire core carburetor has been cleaned and rebuild kit including float needle and seat secret passageway clean any suggestions on a cure
 
Does she blow any black smoke? You might open the load needle 1/2 turn with each test run until it does blow black smoke to eliminate mixture issues from the table. I would start there. Kudos for the new spark plug wires, too many times they are just forgotten about.
 
Sounds like the load side of your carburetor is out of adjustment. I would also check the gas flow to the carburetor and / or float adjustment. Check your engine compression cold and hot, possibly a valve problem. I have also had a condenser act in a similar manner. At a low idle the tractor appeared fine. However, when the engine was throttled up the condenser would break down. I thought it was a carburetor problem because I had just put new points, condenser, plugs, rotor and wires on the tractor.
 
(quoted from post at 19:34:09 07/17/18) My B only fires on one cylinder when put under load like climbing a hill in 6th gear at full throttle magneto has new coil points and condenser new spark plugs wires are wire core carburetor has been cleaned and rebuild kit including float needle and seat secret passageway clean any suggestions on a cure
Click to expand...
hanks for all advice I have been thinking spark will verify with magneto from my BR then try plugs if that doesn’t work will put back magneto and plugs and swap carburetors thanks again
 
I agree with ET. Back in the day our 520 would miss under load.
We kept removed plugs that looked almost new... no carbon. Checked
other things. Finally replaced those good looking plugs and cured
the problem. After that anytime the tractor would miss under load
we just replaced the plugs.
 
You must log in or register to reply here.

Similar threads

D
51 JD A carb issue
Replies
6
Views
413
Danny Boy
D
A
44 B
Replies
8
Views
640
Fixingfarmer
Fixingfarmer
M
Running Rough and I'm out of Ideas
Replies
17
Views
1K
Mnethercutt
M
A
1950 John Deere B idles well, stalls under load or fast
Replies
15
Views
3K
J.Wondergem
J.Wondergem
T
Ford 801 Sputters and dies under load.
Replies
5
Views
714
Steve@Advance
S
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.

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

Back
Top