2001 yamaha 70 hp 2 stoke. 33 mph. Want to go faster.

[G3Ray]

I finally got a new tach installed. I am turning 5850 RPM and running a solid 33 MPH. problem is my prop doesn't have any markings on it or numbers. I would like to get a prop for for speed and maybe add a jack plate. I have looked on my motor and I dont see any max RPM data plate. What SS pitch prop should I go with for my motor. I have a 17 ft G3 HP170

Thanks Ray

[G3Ray]

WOT RPM chart says 5000-6000. So I have about 150 RPM to play with

[PhilN]

Are you trimming the motor up while running? Is the cavitation plate higher than the bottom of the boat? Sometimes motors are mounted too deep which causes drag and loss of RPM. Sometimes the prop pitch is written very small on the inside shaft flange where the rubber is.

[G3Ray]

I am trimming the motor up when I am running. It was below the bottom of the boat. I raised the motor but have yet to test run it