Page 1 of 2 12 LastLast
Results 1 to 10 of 17

Thread: New coil

  1. #1
    Join Date
    Aug 2008
    Location
    Fort Atkinson, Wisconsin
    Posts
    7

    Default New coil

    I cleaned the points off and still nothing, so I think the coil is bad. I got it out last night and have a part number of 201781(IDA-9).

    I tried ebay and Saturn surplus with no luck. Does anyone know where I can find a nos or replacement coil?

    Thanks

  2. #2
    Join Date
    Dec 2003
    Location
    Giddings, Texas
    Posts
    7,729

    Default

    Franks Surplus on E-Bay, VPW or Antelope Valley.

    When you have the ignition on, do you get a spark if you put a screw driver on the points and anything else metal?
    Remember if you didn't build it you can't call it yours.

    6.2 powered M715, 5 M1009's, M416, 2 M101's, 2 M105's, 3 M35's, M1007 6.5 turbo Suburban project called Cowdog.

    https://www.youtube.com/channel/UCCz...HGkBCfhXZ5iuaw

  3. #3
    Join Date
    Aug 2008
    Location
    Fort Atkinson, Wisconsin
    Posts
    7

    Default

    Not all the time. Sometimes I do, and it will start. Then it won't start, and there isn't any spark.

  4. #4
    Join Date
    Jul 2007
    Location
    Rhoadesville, Virginia (five miles from no place)
    Posts
    5,125

    Default

    Be sure you're getting good voltage to the coil with the switch on as well. Check it with a voltmeter at the positive terminal.
    "Free advice is worth what you pay for it."™

  5. #5

    Default

    Its an odd problem to be sure. I'm not sure I would agree that its the coil itself though. Granted, this one is built into the distributor, but its the general nature of small transformers like this to either work or not work. I'm thinking you have a bad wire somewhere ahead of it.

  6. #6
    Join Date
    Sep 1998
    Location
    North Central Wisconsin
    Posts
    11,520

    Default

    If it helps....

    The wire that screws to the side of the ignitor housing, on the coil side, with the semi rounded cap runs directly to the on/off switch where it is attached in the upper right position as viewed from the front. There are 4 positions on the back the on/off switch, 2 rows of 2.
    The wire number is 12.

    So if you arent having trouble with any other systems...at least no known trouble, you can disconnect #12 at the on/off switch and at the ignitor hook up a continuity meter to both ends and wiggle the wire around and see if it loses continuity between the ends.

    If the wire is bad somewhere splice it if you can...the end that attaches to the ignitor has an unusual end that I am not sure is available...I could be wrong on that though.


    Battery power gets to the on/off switch via the cable to the foot starter switch that then runs toward the alternator. There is a splice between the foot starter switch and the alternator that branches off 5 wires...2 of these wires go directly to the on/off switch as wire #11...both of them are marked with 11. The #11 wires connect to the left side of the on/off switch as viewed from the front...one above the other.


    I suppose it is possible that the on/off switch isnt getting power consistently due to a bad wire OR that the switch itself is bad...though I think a wire problem is much more likely here.

  7. #7

    Default Bought A New One

    I thought mine was bad also but it turned out to be other problems. I have a new one in the box. I think I got it from AB Linn a few months ago. It is a replacement aftermarket one. Says; NEW*STAR - Parts Component Group. S-B124 (replacement for 118712) I think the same coil is in the M-37 if I remember correctly so there are lots of M-37 parts people out there.

  8. #8

    Default Here it is. Found the coil receipt.

    Follow the link to page 19. Also, for everyone else. Lots of electrical parts here; lights, switches, ignition, etc. for your military trucks.

    http://www.sandstruck.com/pdf/military.pdf

  9. #9

    Default Coil Also Here

    $45 from Erik's Military. Bought lots of stuff here over the years. email milgenrepr@aol.com or call 760-747-8863. I have a catalog but it is not PDF.

  10. #10

    Default

    I'm reactivating this post. What is unique about coils? My 24-volt truck is running with the a civilian distributor using two external ballast resistors to step-down the voltage.

    I need to order a spare coil. Many threads have said the current coils being sold are made in China and are junk.

    I want to add the pertronicx ignition and they tell me I need a 3-ohm black coil with an external bias resistor. Their black 40,000 volt, oil filled coil is about $30.

    Does anyone have a common part number that NAPA or AAP can cross reference that is 3-ohm?

    With the civilian distributor, do I need to purchase a 24v military coil from Eric's Military or VPW?

    Thanks,
    Mike Cougler, MSgt, USAF Retired, '72-93
    '67 M725, VIN 10030, Delivery: 7/67
    Rochester, NY

Similar Threads

  1. 12v coil for distributor
    By Duane in forum Stock Tech
    Replies: 8
    Last Post: April 9th, 2010, 09:31 PM
  2. coil question
    By 14fan in forum Stock Tech
    Replies: 32
    Last Post: December 4th, 2008, 09:45 AM
  3. 24 v coil
    By jcmitch10 in forum Stock Tech
    Replies: 2
    Last Post: October 16th, 2008, 09:28 AM
  4. Coil
    By ptjeeper in forum Stock Tech
    Replies: 1
    Last Post: November 1st, 2007, 11:38 PM
  5. Coil
    By airborne in forum Modified Tech
    Replies: 8
    Last Post: September 3rd, 2007, 04:31 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


Site Upgrade, Design Modifications & Administrative Support by:
Palm River Enterprises LLC, IT Solutions
President: Tom King, User ID=teking
This site is owned and operated by:
M715 Zone, LLC
President: Jon Schmidt, User ID=brute4c


If you have any suggestions, comments, problems or questions, contact:  brute4c@m715zone.com
Use of this site means you understand and agree to our TERMS OF USE

Copyright Notice:
This web site is subject to the protection of the copyright laws of the United States and other countries. Except for Personal Use Only, you may not modify, copy, distribute, transmit, display, perform, reproduce, publish, license, create derivative works from, transfer, or sell any information obtained from any part of the M715 Zone website without the prior written permission of M715 Zone, LLC. Written permission can only be obtained by contacting brute4c@m715zone.com

Copyright 1998-2024