WTB: Edison # 12 spark pugs

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frontyboy
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WTB: Edison # 12 spark pugs

Post by frontyboy » Tue Oct 28, 2025 12:51 am

Edison #12 plugs need a couple to fill out a set for my 8 valve roof head
tnx
frontyboy. text 2ho6-919-1949


Wayne Sheldon
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Re: WTB: Edison # 12 spark pugs

Post by Wayne Sheldon » Tue Oct 28, 2025 5:17 am

If you would like to have a matching set? It would help to post a couple photos of which ones you have. It may be helpful also to network with a couple other people interested in the number twelve Edison plugs as once a few people have a mixture of styles, they can swap styles around to the benefit of all.
The shape of the porcelain changed a few times through the several year they were being manufactured.


Moxie26
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Re: WTB: Edison # 12 spark pugs

Post by Moxie26 » Wed Oct 29, 2025 10:17 am

Online pictures of Edison 14, and Edison 13 spark plugs...... viewtopic.php?t=18127 , ... More forum history info
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Wayne Sheldon
Posts: 4336
Joined: Sun Jan 06, 2019 3:13 pm
First Name: Wayne
Last Name: Sheldon
* REQUIRED* Type and Year of Model Ts owned: 1915 Runabout 1913 Speedster
Location: Grass Valley California, USA
Board Member Since: 2005

Re: WTB: Edison # 12 spark pugs

Post by Wayne Sheldon » Thu Oct 30, 2025 5:52 am

The 13s and 14s are the pipe thread that fits a model T. I don't know nor have a reference to tell me what the Edison number 12 fits. It could be the model A size or some other (18mm?) that fits some other car. Whatever the thread size and type and whatever they fit would help to identify and get what the OP is looking for.
I am just trying to be helpful.


Topic author
frontyboy
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Re: WTB: Edison # 12 spark pugs

Post by frontyboy » Sat Nov 01, 2025 11:48 am

I have 3 #12 Edison plugs nos. Would like to get another one for my speedster project.

frontyboy


Moxie26
Posts: 1980
Joined: Sun Jan 06, 2019 8:20 pm
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Re: WTB: Edison # 12 spark pugs

Post by Moxie26 » Sat Nov 01, 2025 3:21 pm

Frontyboy..... What is the spark plug thread size in your Roof cylinder head ?


Topic author
frontyboy
Posts: 446
Joined: Tue Jul 23, 2019 3:16 pm
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Re: WTB: Edison # 12 spark pugs

Post by frontyboy » Sat Nov 01, 2025 11:59 pm

Hmm I have no idea never looked guess I will tomorrow!! Darn good question!!

frontyboy

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