The same engine producing less horsepower will last longer than if it
produced max power ... you have a certain amount of horsepower hours in
the machine, take them all out in a hurry or stretch them out, it's up
to you.

rick just gain the hammer mechanic's point of view. Like most things hammer
mechanics say, it is wrong.

"horsepower hours" (what a weird thing for rick to say) go up as the engine is
used "more nicely". Expensive, finely tuned Indy race car engines won't go
that many miles past 500 at WFO throttle, but will last thousands of hours if
you don't beat the crap out of them.

That said, a boat built and engined to plane is not a boat an owner usually
wants to piddle up and down the bay in. such boats usually have just two
throttle positions, Go and No-Go.