"Tim" wrote in message
...
I'm familiar with two cycle motorcycles, and they're power band. Some
are really finicky and doggy untill you hit a certain rpm, then can be
almost uncontrolable. (Motocross) while some have less power yet a
wider range of usable torque.(Streetbikes) and some have the tuning
at the absolute bottom of the rpm ranges (trials bikes)

But concerning a v-4 johnson/evinrude etc. Is there a powerband where
you run a set range rpm for maximum efficiency? too little rpm labors
the engine, and too much gaines little except sucks more fuel?

Well, my experience is that just enough throttle to keep a boat on plane is
the most efficient (get somewhere) setting but this doesn't work for a
normal, round tube pontoon boat.