Thanks Mumbles. Any idea what spark plug was originally called for in the later Zephyrs?
I’m only finding charts for the 1940 – 1942, calling for J10 Champion Plugs.
AC M44C marine plugs were in my Zephyr.
I did a little comparison with plugs I had around.
The vintage J-8J were just a hair shorter than the AC M44C, and the modern J8C were
the longest of the bunch.
The J17LM wins my shorty contest, but I’m not sure yet how they compare on the heat
charts to the others.
I wish I had the NGK plugs you mention to compare. Next trip to the big city I’ll have to
get some.
I like your alternative method sans ring terminals.
While looking thru the old Evinrude manual, I came across Evinrude’s ring terminal tool.
Probably not many of those “out there”.
Thanks.
Prepare to be boarded!