Spark plug wire?

[6tring]

What would be the best grade, type etc. Of 7mm spark plug wire replacement for the 6 and 9.5 hp motors. The wires are always under flex with any twist of the throttle and obviously take a lot of stress with heat and constant vibration. Input most appreciated. Thanks

 

[racerone]

Most boat shops have a roll of it.-----Cut it to length for you.

 

[Edchris177]

It must be copper cored, not the carbon stuff modern cars use. Most copper cored is multi strand, the original lasted 50 years.
On one motor I used what looked like steel wires inside the insulation. It was old school tractor wire, tinned, & it worked fine.