Am I having the proper power to rpm ratio

[NewOwner]

I grew up around lakes and very familiar with the water lifestyle but I’m am very new to owning a boat. I recently just bought a 1998 Response LX and I was wondering if I’m getting the correct MPH to RPM ratio out of it. At about 4500 rpms, I am only going about 35 MPH with only myself and one other person. Thanks in advance for the replies. 

Edited October 9, 2022 by NewOwner
Forgot to put the year of boat

[ahopkins22LSV]

Welcome!

First questions I have are what prop and what elevation are you at? You should be going about 38 at 4500 IMO.

[UWSkier]

Rpm should be closer to 100:1. 35 MPH should be 3500-3700 RPM with a driver and single passenger with no ballast. Are you sure your speedometer is reading correctly? 

[justgary]

And you should be around 5,000 RPM wide open.

[Megavega]

I too just got a 98 Response LX! I bought it from a lower elevation and had to reprop it for my elevation. I used the prop finder tool on Acme's website and researched a little around here to land on the right prop for me(ACME 525). I had the opposite problem though as I was low rpm for WOT per the indmar manual.