(800) 853-2651
SHOP NOW

Farmall BN running rough

S

SleepyFarmall

Member
Looking for advice; my '44 BN starts and runs great for 30-40 minutes then starts mis-firing. Never completely quits but runs like its only firing on two cylinders. Also, hard to restart. 6volt system. I mainly use it to cultivate the gardens.

Pulled the plugs; they are all sooty and maybe gapped to narrow. What should the gap be? Could the plugs be bad?
Cleaned the points and rotor button.
Fuel in the bowl.

Problem persists.
Thanks for any helpful ideas. Michael.
 
The plugs gap at .020-.025 for battery ignition.

Points set .020 battery ignition. Check the points gap carefully, check the distributor shaft for side play. If it's loose the points will not stay set.

Try loosening the gas cap, the vent may be clogged.

The sooty plugs could be from light use, never getting warmed up and worked, and could be a problem. Might try some hotter plugs.
 
I know once they start the stumbles,you want to get them fixed asapa! They play mind games with ya .
My suggestion is buy one of these cheap spark gap tester , see what it spark can jump.
My H4 magneto on the Farmall C jumped over a half inch after new coil ,core points gapped and condenser . I was told by my coach that thats a hot magneto , so if yours jumps that far aint a magneto issue. Look someplace else.
Black plugs to me is carburetor!
 
You must log in or register to reply here.

Similar threads

M
Running Rough and I'm out of Ideas
Replies
17
Views
1K
Mnethercutt
M
F
801 runs rough when timed
Replies
17
Views
840
FarmerBlair
F
J
Farmall 560 running rough
Replies
13
Views
1K
jackson63
J
F
Ford 4000 engine rough
Replies
11
Views
941
Eman85
E
B
Deere MT Running Rough Question #2
Replies
4
Views
253
old
O
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