Yesterday's Tractor Co. Tractor Parts for All Brands
Click Here or call 800-853-2651 
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 
Marketplace
Tractor Manuals
Tractor Parts
Classified Ads
Photo Ads

Community
Discussion Forums
Project Journals
Tractor Town
Your Stories
Show & Pull Guide
Events Calendar
Hauling Schedule

Galleries
Tractor Photos
Implement Photos
Vintage Photos
Help Identify
Parts & Pieces
Stuck & Troubled
Vintage Ads
Community Album
Photo Ad Archives

Research & Info
Articles
Tractor Registry
Tip of the Day
Safety Cartoons
Tractor Values
Serial Numbers
Tune-Up Guide
Paint Codes
List Prices
Production Nbrs
Tune-Up Specs
Torque Values
3-Point Specs
Glossary

Miscellaneous
Tractor Games
Just For Kids
Virtual Show
Museum Guide
Memorial Page
Feedback Form

Yesterday's Tractors Facebook Page

Related Sites
Tractor Shed
TractorLinks.com
Ford 8N/9N Club
Today's Tractors
Garden Tractors
Classic Trucks
Kountry Life

Enter your email address to receive our newsletter!

subscribe
unsubscribe
  
John Deere Tractors Discussion Board

Re: Wico X Mag


[ Expand ] [ View Replies ] [ Add a Reply ] [ Return to Forum ]

Posted by John T on November 05, 2012 at 14:47:53 from (216.249.82.117):

In Reply to: Wico X Mag posted by Buddy Woodson on November 05, 2012 at 13:09:17:

A simple low voltage ohm meter test will tell you if its really BAD (like the LV Primary or HV Secondary is open) but it cant tell you if its really GOOD since many failures involve High Voltage Breakdown and/or occur only after its warmed up and under actual operating conditions. The LV Primary is less then 1 ohm while the HV Secondary is several thousand ohms and if either is open its obviously bad.

The most common cause of mag failure to spark is the points are burned or pitted or even gray oxide coated any of which kills the spark. You might clean n light file them and gap them n see if that cures the problem and replace if badly burned or pitted. Likweise a bad condensor can cause no spark.

Since points and condensor are relatively cheap compared to the coil if the coil passes both continuity tests and doesnt appear or smell burned Id suspect points and/or condensor first.

For the impulse cranking spark to happen the mags wind n trip spring assembly has to be working and it yields a good sharp SNAP each 180 of rotation otherwise no spark at cranking speed.

John T


Replies:




Add a Reply

Name:
E-Mail:
Subject:

Comments:

Optional Link URL:
Link Title:
Optional Image URL:
Optional Video Title:
Optional Video Embed:

Advanced Posting Options

Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.



 
Advanced Posting Tools
  Upload Photo  Select Gallery Photo  Attach Serial # List 
Return to Post 
TRACTOR   PARTS TRACTOR   MANUALS
Same-Day Shipping! Most of our stocked parts ship the same day you order (M-F).  Expedited shipping available, just call!  Most prices for parts and manuals are below our competitors.  Compare our super low shipping rates!  We have the parts you need to repair your tractor.  We are a Company you can trust and have generous return policies!   Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ More Info ]

Home  |  Forums


Copyright © 1997-2014 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