The original plug could have been a
H-10 or a J-4. That chart is from an
Evinrude / Elto Manual. As there is
nothing listed after 1946. That would
indacate when it was printed and these
should be the original plug numbers.
This is the plug I found in this motor
when I got it.You could watch eBay
and in time you may find an original
plug depending how common there
use was at the time.
The lower chart is from the Peter Hunn
book and were probably available at the
time of publication but are no longer.
I believe this is the correct boot.
Nobody has it that I know of.
This guy has the plug wire with the correct end.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.