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WESTCOMVIC Member
Joined: Dec 22, 2010 Posts: 49 Location: Victoria, B.C. Canada
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Posted: Wed Jun 06, 2012 12:23 pm Post subject: Ran great, then motor stopped dead! |
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Had my 1953 M38A1 out for a run after a sucessful go in a local parade,
took the wife out for her run and with no warning or splutter the motor stopped dead. Like the ignition switch was shut off. Checked the switch and have 24.7 volts from the battery side to the positive side of coil. no shorts at condensor. Checked the circuit breaker,bypassed but still no joy.Can a coil breakdown that fast?I have no high tension spark to plugs. Any suggestions,(other than too much estrogen riding along!) Come on Wes, bail me out! Thanks,Dave |
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RICKG Member
Joined: Aug 31, 2010 Posts: 1741 Location: SO IDAHO
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Posted: Wed Jun 06, 2012 12:50 pm Post subject: |
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Happens all the time, Dave- 1 sweetheart gets jealous of
the other sweetheart and quits ya just like that!! _________________ keep 'em rollin'
RICKG MC 51986 DOD 01-52, '50 CJ3a |
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jimm Member
Joined: Nov 01, 2011 Posts: 199 Location: Escondido, CA
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Posted: Wed Jun 06, 2012 3:09 pm Post subject: |
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Yes, I've had two coils (non-M38) fail suddenly, leaving me stranded out in the boonies. Check the coil with an ohmmeter per instructions that can be found in this forum, and let us know what you find out. Also check the points. _________________ Jim McKim
1952 M38 son-father project
Slowly turning rusty parts into OD parts |
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DJ Member
Joined: Apr 15, 2005 Posts: 289 Location: Wis.
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Posted: Wed Jun 06, 2012 3:37 pm Post subject: Re: Ran great, then motor stopped dead! |
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WESTCOMVIC wrote: | took the wife out for her run!!! bail me out! Thanks,Dave |
What happened next?? _________________ 51 M38 ,52 M38 ,53 Jeep PU ,62 M 37 ,68 M 715 |
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TomM Moderator
Joined: Apr 18, 2005 Posts: 458 Location: Rhode Island
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Posted: Wed Jun 06, 2012 5:34 pm Post subject: ignition |
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You confirm 24v on the + side of the coil.
Also, have you checked that the points are opening/closing and have not slipped closed? |
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WESTCOMVIC Member
Joined: Dec 22, 2010 Posts: 49 Location: Victoria, B.C. Canada
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Posted: Wed Jun 06, 2012 7:57 pm Post subject: |
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Yes Tom, confirm 24 volts at + side of coil and points are working correctly. Took the coil in to auto electric place,and although they could not actually test it, suggested the secondary was shot and also confirmed an immediate failure like that was indicated. |
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wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16265 Location: Wisconsin
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WESTCOMVIC Member
Joined: Dec 22, 2010 Posts: 49 Location: Victoria, B.C. Canada
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Posted: Thu Jun 07, 2012 7:57 am Post subject: |
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Thanks for the comeback,Wes. Yes, the vent lines in and out are unimpeded.
From what has been said I think I'm in line for a new coil. Any suggestions on a reliable source? |
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TomM Moderator
Joined: Apr 18, 2005 Posts: 458 Location: Rhode Island
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Posted: Thu Jun 07, 2012 8:07 am Post subject: coils |
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Mullens, AJP and MWM had USA Made, NOS, USGI coils a short time back. |
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WESTCOMVIC Member
Joined: Dec 22, 2010 Posts: 49 Location: Victoria, B.C. Canada
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Posted: Thu Jun 07, 2012 2:46 pm Post subject: |
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Thanks for the tip Tom, I did score one from Erik's Military and Industrial Surplus in Ca. |
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Cacti_Ken Member
Joined: Apr 20, 2005 Posts: 1021 Location: Silsbee, Texas
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Posted: Fri Jun 08, 2012 8:57 pm Post subject: |
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Let us know how that new coil works out. _________________ Tropical Veteran
35th Inf. Reg. "CACTI" 4th I.D. VN
Amateur Radio K5XOM |
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artificer Member
Joined: Feb 16, 2007 Posts: 206 Location: Gold Coast Australia
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Posted: Sun Jun 10, 2012 7:21 am Post subject: |
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I assume most everything with this system is similar to any other conventional system or magneto.
You said no spark to the spark plug. Working backward, did you check from the coil centre to ground? If you get a good saprk here this could indicate trouble with the rotor or shorting/tracking inside the cap. _________________ John GIBBINS
ASE Master Medium/Heavy Truck & Auto Technician 2002 USA
Licensed Motor Mechanic NSW # MVIC 49593 Current
YOU CAN'T TROUBLESHOOT WHAT YOU DON'T UNDERSTAND |
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jbjeeps Member
Joined: Jun 13, 2010 Posts: 179 Location: Idaho
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Posted: Sun Jun 10, 2012 7:51 am Post subject: |
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I want to add my thanks to all who replied to this question. My '53 did the same thing yesterday. As a life-long less than amateur wrench turner, I'm always grateful to the knowledgeable folks who help to bail me out when I get into trouble. Thanks! _________________ 1953 M38A1 (His)
1963 CJ5 w/Tuxedo Park Mk III (Hers)
See you at the Old Jeep Rendezvous in Ashton, Idaho 9:00 am - Noon on the first Saturday after July 4th. All pre-1970 Jeep vehicles, military or civilian, stock or modified welcome. |
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wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16265 Location: Wisconsin
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Posted: Sun Jun 10, 2012 9:05 am Post subject: |
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Quote: | I assume most everything with this system is similar to any other conventional system or magneto. |
Up to a point. The connections are the tough obstacles for a novice to overcome since the coil is buried inside the distributor and does not use the common center high tension (secondary) cable folks are used to in conventional external coil systems. And the primary wiring uses cannon type connector.
_________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php |
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