Reply To: Spark plug? -1937 Muncie Neptune O B12A

[Buccaneer]

Thank you both. I always forget about the “Old Outboard Book”,
that was sitting two feet away, underneath some papers!
I put a D16 in the one I fired up yesterday. Can’t remember
if that’s Hotter or Colder than the recommended D14,
but I have a chart for that!

Prepare to be boarded!