(800) 853-2651
SHOP NOW

Farmall H runs... Well... Wierd

B

bankshotone

New User
I restored this tractor about 15 years ago and had a complete overhaul, ever since then it hasn't ran right, it's like it faintly flutters while running, very hard to describe, I have put in electronic ignition, didn't help, have messed with the carb on and off for several years. I finally got mad and got a core carb and installed a comprehensive kit, I installed that yesterday, it maybe runs 30% better. I noticed when I bought the new manifold (when I overhauled the engine) that it must be a universal fit (H, super H 300'350) the carb mounting holes are slotted to accept with size carb. I have not seen another manifold like this since then, could a bigger manifold cause it not to draw properly?
 
I suspect an air/vacuum leak. When it is running, spray some carb cleaner or other stuff, around the manifold to block and carb to manifold. HTH
 
Another thing I have seen used is your little propane tourch. Open the valve but don't lite it. With the tractor running wave the tourch jet all around the manifold. If memory serves the extra fuel "the propane vapor" will cause the engine to run rich. You should get a pretty definet response.
 
Were the valves replaced during the overhaul? I bought a H that was overhauled and the owner said he could never get it to idle smoothly. It turned out to be that someone had installed valves for high altitude operation (longer stems) and the correct adjustment was not possible.
 
I bought an H on an auction once that would never quite run as smooth as you expected.

Turned out the distributor drive gear was one cog off.
 
Honestly, I don't remember if the valves were replaced or not. I'm pretty sure they were, I'll check that out again.
 
I would try a different manifold. I have found many of the after market ones with poor air flow through them. Meaning the inside is rough casting and the air just does not flow correctly/even to all cylinders or at different speeds.
 
I would suspect manifold first, but test that by spraying propane around the edges.

My H had a little flutter, surprised me, but was condenser.

They will develop a little lope at idle if timing is advanced too far, I time mine by ear, run WOT, move distributor so it gets max RPM, then idle back and retard a little if it is loping.
 
You must log in or register to reply here.

Similar threads

F
Farmall h smoking
Replies
6
Views
613
used red MN
U
J
Farmall H - Only runs on 3/4 choke
2
Replies
21
Views
2K
JMFarmallH
J
N
Getting a feeler for latest Farmall H market values
Replies
9
Views
762
Whiskey Bent
W
crsutton81
Wisconsin VH4D troubles
Replies
13
Views
1K
crsutton81
crsutton81
O
New to me JD 620 PTO/3 pt issues
Replies
11
Views
1K
offroad23
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