Welcome! Please use the navigational links on your left to explore our website.

Company Logo Shop Now
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 
Marketplace
Classified Ads
Photo Ads
Tractor Parts

Community
Discussion Forums
Project Journals
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
Ford 8N/9N Club
Kountry Life
  
John Deere Tractors Discussion Forum
:

Model B Wico C Magneto issues

Welcome Guest, Log in or Register
Author  [Modern View]
blacty

12-18-2020 07:26:22




Report to Moderator

Hey guys, im new to the forum and also new in this world of restoration. I recently picked up my grandpas 1948 B and want to restore it and bring it back to its old glory. Got it home, and surprised to find i had not problem cranking the engine, so that was good news. After doing some minor maintenance in order to get it ready to try to start, i found that my magneto was cracked and completely corroded inside. I was able to relocate a used magneto that stated it had spark so i purchased it. Sadly no spark.
Bought a new cap, new plug wires and new rotor. Still no spark. Im new to magnetos but online searching is telling me that it could be the coil or the condenser. Anybody have any thoughts on the best way to test these two items.

[Log in to Reply]   [No Email]
Rich'sToys

12-22-2020 18:39:47




Report to Moderator
 Re: Model B Wico C Magneto issues in reply to blacty, 12-18-2020 07:26:22  
Glad it worked out.



[Log in to Reply]  [No Email]
blacty

12-21-2020 17:26:46




Report to Moderator
 Re: Model B Wico C Magneto issues in reply to blacty, 12-18-2020 07:26:22  
I got it. Thanks for all the help. Points needed cleaned and gap set to .015. Got great spark. No carb work. That should be easier. Thanks guys



[Log in to Reply]  [No Email]
brownie450

12-19-2020 04:51:41




Report to Moderator
 Re: Model B Wico C Magneto issues in reply to blacty, 12-18-2020 07:26:22  
The crudded up points is a definite possibility. I've
had 3 engines that needed points cleaned this past
summer. I believe it was due to the very humid conditions
which we had.
All 3 were corrosion on the points. Certainly worth looking
into.
Jim



[Log in to Reply]  [No Email]
NoDakInMN

12-18-2020 15:52:43




Report to Moderator
 Re: Model B Wico C Magneto issues in reply to blacty, 12-18-2020 07:26:22  
The points are the set of contacts that are mounted on the frame of the magneto below the coil. The condenser is the small metal tube, about 1/2" in diameter, that is mounted close to the points and has one wire coming out of it and is attached to the points. These are the two components that are most often the problem in magnetos. Oxidation can occur on the contacts of the points, this acts as an insulator and prevents current flow. It does not take much to clean that off, a lot of people will fold a dollar bill and run that between the contacts a few times. Very fine emery cloth will work as does a small fine file. The condenser can be replaced, but beware, they are sometimes bad right out of the box.

As John T noted, you need to be sure your impulse is working. When the engine is spinning at cranking speed when trying to start, the magneto is not spinning fast enough to generate enough power to provide adequate spark. To compensate for this, the magneto has an impulse in it. Simply put, the impulse is a spring that is wound up and releases just as the magneto is about to fire. When it releases, the magneto spins a lot faster and that is enough to generate a good spark. When the tractor is running, the dogs that allow the spring to wind up are kept from engaging by centrifugal force. So, as Jon T said, you should hear the click from the impulse tripping twice every revolution of the flywheel. If this is not happening, you will not get spark. Usually the fix is pretty simple, a broken impulse spring being usual culprit.

[Log in to Reply]  [No Email]
Loosehandle

12-18-2020 13:51:42




Report to Moderator
 Re: Model B Wico C Magneto issues in reply to blacty, 12-18-2020 07:26:22  
I would switch to a model X mag.



[Log in to Reply]  [No Email]
Rich'sToys

12-18-2020 12:43:36




Report to Moderator
 Re: Model B Wico C Magneto issues in reply to blacty, 12-18-2020 07:26:22  
When they say "points", they're referring to the ignition points. They will look similar to the attached picture. When the main shaft turns, these will open and close. When you locate them you will be able to open and close them by sticking a screwdriver in there. These are the points you need to clean up with emery paper or a tiny file. Hope this helps.

[Log in to Reply]  [No Email]
blacty

12-19-2020 03:45:05




Report to Moderator
 Re: Model B Wico C Magneto issues in reply to Rich'sToys, 12-18-2020 12:43:36  
Thanks a ton for the clarification with pictures. i will take a look at all this today. Thanks for the help!!



[Log in to Reply]  [No Email]
Ben.So.Tex

12-21-2020 14:01:35




Report to Moderator
 Re: Model B Wico C Magneto issues in reply to blacty, 12-19-2020 03:45:05  
If my memories is correct the C mag is a two piece point set.



[Log in to Reply]  [No Email]
John T

12-18-2020 09:04:43




Report to Moderator
 Re: Model B Wico C Magneto issues in reply to blacty, 12-18-2020 07:26:22  
While I have seen many mags coil or condensor fail, a more common cause of no fire are the points are burned or pitted or even just oxide or carbon coated which a non abrasive as possible clean/buff/polish might cure. I have used a clean shop cloth or even a dollar bill dragging it between the points to clean them or if badly burned or pitted dressing them with a points file might get you going. However if they are badly burned or pitted a new set is in order AND CHECK FOR THE PROPER GAP... If its NOT the points a condensor is cheaper then a new coil if you don't have the means to test either of them.

For it to fire at slow cranking speed the Mags IMPULSE ASSEMBLY must be working (the can get clogged or the spring broke or the wind n trip assembly not work) whereby a spring winds up then trips/releases at which time you should hear a loud distinctive SNAP. As you turn the flywheel/engine slowly see if you hear that loud SNAP every 180 degrees ???????????? If not she's not gonna fire at slow cranking speed.

John T

[Log in to Reply]  [No Email]
WTW

12-18-2020 08:07:38




Report to Moderator
 Re: Model B Wico C Magneto issues in reply to blacty, 12-18-2020 07:26:22  
You did not mention points?? Most often when mag set around the point will oxidize and will not make good contact. Point are nothing more than an on / off switch. Clean points contact surfaces with fine emery or file and blow them clean and see if spark returns. DW



[Log in to Reply]  [No Email]
teddy52food

12-18-2020 07:55:30




Report to Moderator
 Re: Model B Wico C Magneto issues in reply to blacty, 12-18-2020 07:26:22  
I work on them as a hobby. I have the testers and a magnet charger. I can help if you need it.



[Log in to Reply]  [No Email]
wilson ind

12-20-2020 16:17:59




Report to Moderator
 Re: Model B Wico C Magneto issues in reply to teddy52food, 12-18-2020 07:55:30  
sure would like tour phone number!!! mine is 812 665 2419



[Log in to Reply]  [No Email]
blacty

12-18-2020 09:26:13




Report to Moderator
 Re: Model B Wico C Magneto issues in reply to teddy52food, 12-18-2020 07:55:30  
Thanks Guys, all new to me and this all helps. When you guys talk points, i will have to look hard to make sure im hitting all the points. When i think of points, i think of the 2 under the cap that the rotor passes by and the one on the middle of the coil. It does have the snap your talking about, it does wind and snap every 180 degrees so sounds like thats good.

I will keep you guys posted!
Thanks for all the tips!

[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


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. [ About Us ]

Home  |  Forums


Today's Featured Article - Pitfalls of Tractor Engine Rebuilds - by Chris Pratt. The first pop after you have put the machine together with your own hands is exciting and pleasing. The whole experience can be marred if one moves too fast and makes too many assumptions that they can just use "as is" some parts they should be closely scrutinizing and possibly attended to. In such cases, rework makes what could have been a fun project turn into an irritant or even a nightmare. Minor Irritants To give you an example of an minor but irritating proble ... [Read Article]

Latest Ad: 560 factory lp has Schwartz wide front new seat all gauges work fast hitch 14.9 38 tires has power steering leak on return side lights work ta works as it should 2 sets rear wheel weights possible trade on other tractors 340 farmall john deeres molines can text pics [More Ads]

Copyright © 1997-2021 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