prop question, do rpm matter?

[gofastsandman]

Ok I need to come on in to the confessional. I am now running an SST I 15x16. `96 rude 150 compression 87-92 cold. Butterflies were closed. Yeah, I now know better. Engine runs nicely. Normal load and bimini up I only turn 5000-5100.

AV plate is @ 1 1/2 " above hull.

BRP tech support says my motor makes full power @ 5000 and that you are only putting more stress on the motor spinning it higher for no gain. They said it`s not a merc or a yami and was not meant to rev that high. This goes against everything I have learned and been taught. I have not timed the motor nor have I ever done a link n sync.

BRP said when they train their factory techs they tell them to prop motors at the mid point of the range. For me that is 5000.

I can hold plane @ 11 now , down from 17 mph so that is nice. I premix and run rec 90.

Confused,
GFS