"Harry.Krause" wrote in message
...
I'd like a top end in the low-mid 40's with the Parker and a 300 hp four
cycle. On a good day, I can just almost hit 40 mph. What I really want is
to raise my "comfy" engine cruise to just a hair over 30 mph. Right now,
I'm a tad under that at an engine speed that sounds right to me.

You just described my boat to a tee.

25' Whaler Outrage Cuddy with a 250hp Suzuki. Low-end grunt is plenty
however. That 16" prop and low gear-ratio jumps the boat on plane as
quickly as the carbed 2-stroke Yamaha it replaced...but with an 80%
improvement in the fuel economy.