I'm considering adding a pyrometer to my boat...

Jonathan I'm not that familiar with the marine application of
pyrometers.

But years ago (and Scotty can correct me if I am not remembering
things correctly)in the trucks we as drivers monitored the pyro-
meter to determin the heat build up in the turbocharger only.

We were still very reliant on the water temp and oil pressure guages
and their respective readings as well.

Bill

(Who loved his 1693 "Cat" to work with.)