Spark Plugs

[wyatt emp]

What spark plug is used in a standard JD 74 (1926) cylinder and where can I get them?

[exeric]

I've been using the Autolite 3076 in my 1916 J, that I get from NAPA. That is a 7/8" plug.

[wyatt emp]

Thank you. I will try them. Bought a set off E-Bay the seller stated were for a JD but thread was WAY too small. Maybe for a 62"? Only paid a couple of bucks each so no big loss there.