Antique Engines and Old Iron
[Home] - [HELP] - [Forums] - [Library] - [Photo Gallery] - [Groups] - [Classified Ads] - [Subscribe] - [Links] - [Books] - [Sponsors] -

Go Back   SmokStak > SmokStak® Antique Engine Community > Magnetos, Ignition Coils and Spark Plugs
Forgot Password? Join Us!

Notices

Magnetos, Ignition Coils and Spark Plugs Discussion about magnetos, buzz coils, spark plugs, ignitors and low tension coils.

Magnetos, Ignition Coils and Spark Plugs

FM J Mag Help


this thread has 5 replies and has been viewed 616 times

Reply
 
Thread Tools Display Modes
  #1  
Old 05-16-2018, 03:29:07 PM
bill chasser bill chasser is offline
Registered-III
 
Join Date: Jan 2007
Location: sacramento CA usa
Posts: 447
Thanks: 9
Thanked 97 Times in 72 Posts
Photo FM J Mag Help

Iím having an issue with the pulse coupler operation on an FM-J. The lever on the snap coupling had a tiny spring to push the lever outward to hit a stop on the outer case. The problem is it is not consistent in its operation when preparing to start the engine I took the coupler off and found that there is some magnetism to the snap coupler body causing the flyweight portion of the arm to be stuck to the body which overrides the strength of the wire spring. Am I correct that this should not be magnetized so as to allow the lever to operate freely and that it is the centrifugal force once the engine is running that prevents constant snapping of the coupler.

Should I degouze the coupler?

Thanks
Attached Thumbnails
Click image for larger version

Name:	image.jpg
Views:	58
Size:	190.0 KB
ID:	310585  
Reply With Quote
Sponsored Links
  #2  
Old 05-16-2018, 03:58:00 PM
mmcdonald mmcdonald is offline
Banner Sponsor
 
Join Date: Jun 2006
Location: Jefferson, Georgia, USA
Posts: 590
Thanks: 13
Thanked 211 Times in 189 Posts
Default Re: FM J mag help

It should not be magnetic. A growler will fix that quickly if you have access to one. Put the part in the "V" of the growler. Turn it on and then remove part, then turn growler off. Do not leave growler on more than a second or two without something in the "V", can cause damage. This has always worked for me.
__________________
info@mcdonaldcarb.com
Reply With Quote
The Following User Says Thank You to mmcdonald For This Post:
  #3  
Old 05-16-2018, 06:36:57 PM
bill chasser bill chasser is offline
Registered-III
 
Join Date: Jan 2007
Location: sacramento CA usa
Posts: 447
Thanks: 9
Thanked 97 Times in 72 Posts
Photo Re: FM J mag help

Quote:
Originally Posted by mmcdonald View Post
It should not be magnetic. A growler will fix that quickly if you have access to one. Put the part in the "V" of the growler. Turn it on and then remove part, then turn growler off. Do not leave growler on more than a second or two without something in the "V", can cause damage. This has always worked for me.
Thanks. Yes I have taken care of it and it now works correctly. I think the mag shop recharged the magnets and didnít protect the coupler.

Next question. Working on another FM-J mag with a similar symptom in that the snap coupler isnít working. Upon removing the mag it is missing the pin in the housing that the mag coupler lever is suppose to but up against. I need the slot head pin that screws into the case. Is there a parts source for these? I donít have any spares

Bill
Attached Thumbnails
Click image for larger version

Name:	95CABBCE-C0A5-4713-B18D-6F8209432A80.jpg
Views:	30
Size:	118.4 KB
ID:	310638  

Last edited by bill chasser; 05-17-2018 at 10:56:20 AM.
Reply With Quote
  #4  
Old 05-16-2018, 06:41:25 PM
stufforbud stufforbud is offline
Subscriber
 
Join Date: Sep 2007
Location: Arlington, Washington, USA
Posts: 341
Thanks: 427
Thanked 139 Times in 131 Posts
Default Re: FM J mag help

I've got lots of those. Send me an email with your address and I'll send you one. Are the threads in the housing good?
Bud
Reply With Quote
  #5  
Old 05-20-2018, 01:37:59 PM
bill chasser bill chasser is offline
Registered-III
 
Join Date: Jan 2007
Location: sacramento CA usa
Posts: 447
Thanks: 9
Thanked 97 Times in 72 Posts
Default Re: FM J mag help

Bud thank you for your offer. I can’t tell if the threads are good at this point. I disassembled the engine this mag was on and it wasn’t inside. I’m assuming the mag had been removed for a repair in its history and someone failed to put the pin back in place. I’ll try to look at the housing closer today.

Bill
Reply With Quote
  #6  
Old 06-05-2018, 04:30:20 AM
bill chasser bill chasser is offline
Registered-III
 
Join Date: Jan 2007
Location: sacramento CA usa
Posts: 447
Thanks: 9
Thanked 97 Times in 72 Posts
Default Re: FM J Mag Help

Bud you have new Email

Thanks

Bill Chasser
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

F o r u m Jump


Use "Ctrl" mouse wheel to change screen size.
All times are GMT -4. The time now is 03:16:10 PM.

Smokstak and Enginads site search!


All use is subject to our TERMS OF SERVICE
SMOKSTAK® is a Registered Trade Mark - A Community of Antique Engine Enthusiasts
Copyright © 2000 - 2016 by Harry Matthews P.O. Box 5612 - Sarasota, FL 34277