And the statement is still true that Jax assumed spark plug when the
author wrote plugs. That would be the conclusion most attained. That
does not mean thats the only plug it could be. Also what powered the
ice machine? Anyone know?


Don't know. Would bet any refrigeration/ice making capability would be
electrical from the generator.
Many smaller fishing boats load a good amount of ice prior to sailing.
BTW, don't know of any present day diesel setups on fishing boats, using a
Donkey engine to start the main (which is not to say some don't exist) Main
starting source is battery or air.

Shen