Yea, I've seen 65.3 GPS with mine. I'm making 502 HP at the flywheel, probably around 475-480 at the prop. My outdrive is too deep and I could probably get a couple more MPH with the right drive height. I don't believe the 70 MPH with twin 200s. The Seavette is a heavy boat and I believe that it would take 600+ HP to get it to run 70 MPH.
