Which Edison spark plug (number) fits the Model T? I read on this forum several weeks ago that the correct spark plug was #14. Is this correct? If so, is there just one number or will other numbers work? Jim Patrick
#14 is one of them, although that #14 type looks to be a later style of plug, perhaps from the 1930's.
Not sure what the number was on earlier Splitdorf Edison plugs, there were probably several Edison types applicable to the Model T.
A set of # 14 Edison plugs have been running in the '26 for the past 5 years. Checked the condition and gap last year, clean burning and slightly larger gap.... put them back in...purrs along.
The plugs pictured were purchased by me from a fellow forum poster, and are now installed in the 1922 Touring at the Glenmont Estate of Thomas A. Edison.
Our '26 engine with Edison spark plugs