Re: What diameter (mm) is standard ignition wire? Ill.

[jeff-register]

If I may add to the reply is to be sure the wire is stranded with very many strands. That makes it more flexable & will carry the current better. I know some ignitions had a very high voltage output. They require a better grade of insulation. That is called a higher dielectric value. Good luck with your new wires. 😉