(800) 853-2651
SHOP NOW

John Deere A won't start

D

derbynut

Member
I have a "41 slant dash A that will not start with the electric starter but will start if pulled. It is turning over just fine,it has good compression, all valves are operating properly, the carb has been rebuilt with every part new including the nozzell, the mag is hot and spark is good, plugs are new and checked in running tractor, timing is right. What am I missing?
 
Thanks for your reply. The impulse "seems" to be working and I hear it snap when I turn it over by hand. I'put a tester inline with the plug wires (the kind that lights up when it fires) and the spark is there. I also pulled the plugs and grounded them and watched them spark while cranking the motor. The plug wires are automotive type with boots and fairly new. I've tried Champion and autolite always with .03 gap.
 
Sounds like part of your problem is the plug wires. On tractors you need the true copper wire plug wires and on mags its 199% that you have to have true copper wire plug wires. Ones made for cars and trucks do not work well and cut down in the spark. I would replace those wires with true wire plug wires and see if that fixes your problem
Hobby farm
 
I'm asking if the wires are resistor or solid core. Plus the make & model of the plugs.
30 thou is pretty generous for a mag.
 
I thought I posted this, hope it doesn't show up twice:

When I said "automotive type" wires I meant rubber with boots rather than the sort of braided fabric used years ago. Mine are solid copper. Plugs are champion D16. Now there is a new problem, the mag is dead! I promise you it was working and I have a witness to the inline tester flashing. Perhaps it works then doesn't work? The impulse is working fine. I thought I'd start from scratch and check the timming so I bench tested the mag and found it dead. Now I have that to figure out before I can move forward and hopefully that will solve my problems. Thanks for the help so far, I may be back......
 
You must log in or register to reply here.

Similar threads

B
8N won't start
Replies
5
Views
281
fusion1
F
B
8N Won't Start
2 3
Replies
43
Views
1K
soaked
S
M
Farmall 130 wiring
Replies
11
Views
360
used red MN
U
mdm1
cub lowboy no start
2
Replies
32
Views
1K
showcrop
showcrop
H
John Deere B won’t start
Replies
7
Views
350
620 John
620 John
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