(800) 853-2651
SHOP NOW

spark plugs

D

Don Lyon

New User
What spark plugs should I be using in a 1957 gas 860? All the tune-up pages I go to list gap but not plug number. Also, on this website on the tune-up page under timing mark is says FLY--what is FLY? I am currently using Autolite 437 plugs but its running a little rich so I'd like to go to a hotter plug. I've got a new head, new carb and fresh ignition buts its still too rich. Thanks, Don.
 
(quoted from post at 15:59:15 05/27/15) What spark plugs should I be using in a 1957 gas 860? All the tune-up pages I go to list gap but not plug number. Also, on this website on the tune-up page under timing mark is says FLY--what is FLY? I am currently using Autolite 437 plugs but its running a little rich so I'd like to go to a hotter plug. I've got a new head, new carb and fresh ignition buts its still too rich. Thanks, Don.
Click to expand...
hanging spark plugs will not alter the air/fuel ratio. That is done by adjusting the main power adjust needle on the carb. Screw in to lean the mixture.
 
Plugs are not likely to be your problem but carb and or air cleaner very likely to be the problem. Air cleaner needs to be cleaned and new oil put in and maybe adjust the carb main jet some to lean it out. If adjusting the main jet does not help good chance the carb need cleaned/rebuilt
 
I've got a new (not rebuilt) carb, new ignition, new head. I've checked for intake leaks with no luck. Adjusting the carb does not noticeably change the way the motor runs which is puzzling. I'll tear apart the aircleaner but I've looked at it and seems ok. I'll check it for insect or mouse nests up inside the housing, oil is clean. I can't find any data about the correct spark plug to use, I just replaced the ones that were in it and don't know if they are right-Autolite 437. Thanks for the suggestions, Don.
 
You must log in or register to reply here.

Similar threads

J
Ford NAA Distributor/Spark problems
Replies
9
Views
503
Tim PloughNman Daley RIP
T
D
Autolite 388 spark plugs for 730
Replies
6
Views
578
drummer481
D
R
Electronic Ignition Weak Spark
Replies
16
Views
955
RTR
R
K
spark plugs for perkins gas
Replies
5
Views
536
keotie
K
SouthIL400
Spark Plugs Gap
Replies
1
Views
326
rustred
rustred
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