spark plug question

[parluskq]

I have a 16 hp b&s cast iron mid to late 70's. I recently changed it over to a magnetron ignition, do I use the same sparkplug, or should I change to a different one?

 

[Stimw]

The same plug should work but it probably needs a wider gap.

 

[eddie48]

Use a Champion J19LM. .030 gap