Re: Johnson a-25 carb gaskets and ign wires

[legendre]

Most all old engines of this type use a 7mm copper-core plug wire. My local O’Reilly has it for $0.69 / per ft. – if you have one in your area, it’s probably a similar situation.

Either way, you want a copper wire core (as opposed to the fiber / carbon stuff used in modern automotive ignitions) with a plain, as in non-resistor type plug cap.

In fact, most motors from this era didn’t even have a plug "cap", just a brass terminal screwed into the end of the wire, which then attached to the plug by the old-school type screw-on plug terminal. Either way, don’t use a resistor WIRE, CAP or PLUG and you’ll be OK! 😉