princecraft pontoon , vectra 21 2015 with 115hp Command thrust prop selection

[Clancy12]

Hi, I have a 2015 pontoon, vectra 21 ft with 115hp CT, thinking of changing props, what are you guys running for size? top speed, rpm?

I have 15x15p and running 6000rpm 33-34 mph not loaded

 

[emilime75]

Not going to hold my breath based on how little action there is in here...but, we just bought a new to us 2018 Vectra 21 bi-toon with lifting strakes, under skinning and a Merc 115 Pro XS CT 4 stroke. With a 14.5" x 17P prop, our best with a light load was 58-5900 RPM and 25-26 MPH. Max RPM for the motor is 6300, so I'm thinking there's a little more left in it with a prop change.