(800) 853-2651
SHOP NOW

Model B Magneto

D

dmunger

New User
I have my magneto removed from my tractor. It had very weak spark. Installed new condenser, points and coil. I hooked up number one spark plug and turned over the magneto. Every time the mag snaps the plug fires, even when it's not pointing to number one plug. Is this normal?
Thanks, Dale
 
Sounds like you have a cracked cap which is shorted out due to water so it fires on one or all the plugs at the same time or the rotor is not turning. Send me an e-mail and which mag you have an I can send you the manual for that mag
 
I installed a new cap and that fixed the problem. Thanks to everyone on this site for the help you offer.
 
Never heard that one and it sure is not in either of the mag manuals I have and I have done that many many times and NEVER hurt a mag to this day
 
If the mag is in good working order and you crank it over without having all wires in place near a ground, the spark WILL find ground somehow.If that means traveling under the cap to another wire, it can leave a carbon trail that CAN ground out that wire before it gets to the plug.
 
Still seems odd since in the 30 plus years I have been messing with engines I have NEVER had any problems. And when I say engines I mean just about any thing other then air planes
 
You have been lucky. That hot spark has to go some place. It can go through the insulation in the windings of the coil & short it out.
 
Most if that is so will take the path that is the shortest which will be the gap at the shut down tab
 
You must log in or register to reply here.

Similar threads

63mercragtop
Farmall A 1941 Magneto Conversion
2
Replies
26
Views
731
teddy52food
T
P
39 B Mag problem?
Replies
9
Views
434
teddy52food
T
K
timing magneto to 1954 oc-3 Cletrac
Replies
3
Views
438
J.Wondergem
J.Wondergem
O
630 ignition issues
Replies
4
Views
375
PJH
P
G
2nd post 8n ford wont start
Replies
8
Views
359
Eman85
E
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