(800) 853-2651
SHOP NOW

JD 318 surging B43G engine

R

Roger in Iowa

Well-known Member
My 318 started surging after I installed an electric fuel pump to aid quick starting. It definitely helps with the starting, now almost instantly. However, I must have dislodged something and it is now plugging a jet in the carb, causing it to surge. I can get rid of the surge by use of the choke. Seems the same choke setting works for low idle and high idle. I have only one adjustable screw for mixture on the front of the carb. Doesn't seem to make any difference on the surging or running. Looking at the PC there is another fixed jet behind a plug, or a high altitude adjustable screw and jet could be installed. Mine just has a plug. Any advantage/need of installing the adjustable one? Altitude is only 800 feet.

Which jet or adjustment is for high idle and other for low idle?

Before I do any of that, can I get access to clean anything by removing the top of the carb?

Thanks for any help.
Roger
 
The idle jet is plugged, a common SCOURGE of those carburetors. The brass idle jet/tube can be removed & cleaned after taking the top part of the carb off. Probably 'tube vids of that, I can post more details later if you need more assistance. I have cleaned out 3 of them in the last few weeks.

They sure run nice after that!

Also, there's a tiny aluminum Welch plug in the idle circuit that can leak or get dislodged.
 
(quoted from post at 19:24:11 09/28/21) Wore out, is the welch plug visible after I remove the top of the carb?

Thanks for the details!

Roger
Click to expand...

Welch plug is EXTERNAL, low down on the front/PTO side of the carburetor.
 
You must log in or register to reply here.

Similar threads

D
1947 Ford 2N searching for steady rpm at Idle?
Replies
8
Views
220
Dwd14329
D
M
MF35 Petrol/TVO running very poorly
Replies
3
Views
272
Ericp351
E
S
Ford 860 engine surging
Replies
6
Views
440
saskboy1950
S
R
Carburetor Adjustment, Timing Adjustment or Engine Issue
Replies
2
Views
447
RTR
R
3
Need advice on setting the idle screw
Replies
7
Views
506
34Case
3
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