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Subject: Spark Plug Conduits

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Tim Daley(MI)    Posted 08-28-2017 at 22:19:50 [URL] [DELETE]        [Reply] [No Email]  
  • Spark Plug Conduits
  • I’m looking to identify the three different spark plug wire looms/conduits used on the N-Series Tractor models. The July, 1948 MPC lists all three:

    9N-12112 – for battery ignition, ‘39-‘47

    2N-12112 – for magneto conversion, ’39-‘48

    8N-12112 –spark plug wiring, ‘48

    The archived thread where I got this photo from stated the short loom pictured is for the 8N Front Mount Distributor (Note that the angle-mount distributor did not use a wiring conduit) and the longer one is the 9N/2N loom. Well, based on what I learned about the wartime 2N’s using a shorter loom, and it says so in the MPC, then I’d say the short one pictured is the 2N style used with a magneto, and not the 8N style. So that leaves the question what is the correct 8N loom? Since both the 9N and 8N engines were basically the same, why wouldn’t the looms be the same? What was different between the 9N and the 8N looms? Obviously the 2N engine was the same too but with a magneto instead of the front mount distributor, running wire lengths would be shorter to the side of block instead of front.

    2 of 3 FORD N-SERIES WIRE LOOMS:


    Tim Daley(MI)

    Tim Daley(MI)    Posted 08-31-2017 at 09:55:54 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Spark Plug Conduits
  • The archive thread is correct about the 9N and the 8N Conduits. Here are some pictures of my early 9N and early 8N conduits:

    9N-12112- CONDUIT:



    8N-12112-A CONDUIT:



    Tim Daley(MI)

    JMOR    Posted 08-29-2017 at 18:10:28 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Spark Plug Conduits
  • 9N/2N had battery mount high enough for tube to extend back under battery tray, but lower mount battery of 8N could not accommodate long tube.

    chris eby    Posted 08-29-2017 at 17:44:21 [URL] [DELETE]        [Reply] [Email]  
  • Re: Spark Plug Conduits
  • here is my 1943 warhorse

    mhb@ufe    Posted 08-29-2017 at 18:32:03 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Spark Plug Conduits
  • That's the same as the one I have.

    Mark

    Tim Daley(MI)    Posted 08-29-2017 at 18:22:43 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Spark Plug Conduits
  • THANKS CHRIS!!! hey...where's the carb.... : > )

    Tim Daley(MI)

    mhb@ufe    Posted 08-29-2017 at 09:20:20 [URL] [DELETE]        [Reply] [Email]  
  • Re: Spark Plug Conduits
  • I have a conduit that is used with the magneto and it is short like the 8N one but turns to the right at the front instead of down like the ones for distributors.

    Mark

    Tim Daley(MI)    Posted 08-29-2017 at 09:35:24 [URL] [DELETE]        [Reply] [Email]  
  • Re: Spark Plug Conduits
  • I noticed the 9N and 8N 90° downward pointing front ends are angled different. The plug wire ports are in different places as well. Can you post any pictures? If not email me what you have in jpg format and I will post them...thanks.

    Tim Daley(MI)

    Tim Daley(MI)    Posted 08-29-2017 at 18:18:43 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Spark Plug Conduits
  • Yep, was at farm/barn/shop today and got pictures and measurements. The 9N conduit measures about 25-26 inches long from open end to bend.

    Tim Daley(MI)

    Randy(PA)    Posted 08-28-2017 at 23:43:35 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Spark Plug Conduits
  • Tim, it looks like the red one shown is a match to the drawing 8N-12112-A. The overall length from the centerline of the 4.5" leg to the end of the long straight section is 16 1/16". It was drawn in May of 1947 and the -A was added in May of 1949. That is the only one I have.

    Tim Daley(MI)    Posted 08-29-2017 at 06:56:41 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Spark Plug Conduits
  • I was thinking about the 9N/2N conduit and the 8N conduit and realized the differences in lengths are because of how the wiring feeds to the cutout and/or voltage regulator and ballast resistor...here's a 9N loom:



    Tim Daley(MI)

    Steve Dabrowski    Posted 09-02-2017 at 17:31:34 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Spark Plug Conduits
  • Tim- I need a manifold just like this one, can be in poor condition for the mating surface, just want the vacuum port to be good. Want original Ford not report. Plan to rescue port for use in original 39 manifold that is messed up as to the port.

    Steve

    Tim Daley(MI)    Posted 08-29-2017 at 08:10:50 [URL] [DELETE]        [Reply] [No Email]  
  • 8N WIRING CONDUIT
  • I see the differences now between the 9N and the 8N conduits. I still want to see the 2N-12112 conduit.


    8N SPARKPLUG CONDUIT; photo courtesy of Steve Dabrowski:


    Tim Daley(MI)

    Tim Daley(MI)    Posted 08-29-2017 at 04:38:11 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Spark Plug Conduits
  • Thanks, Randy. I will check both my early 9N and my early 8N when I go to the farm/barn/shop later. Both of my tractors are all original and I'll be sure to get some pictures. Not saying the picture here is wrong from the original post, just makes more sense the short tube would be the 2N style. Any warhorse owners care to pony up?

    Tim Daley(MI)

    r geiger    Posted 08-28-2017 at 22:38:58 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Spark Plug Conduits
  • my ipc only shows one part number for them, up to serial number 263844. magneto had no wires running from dash to the magneto, so the long tube was not needed.

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