I have a 2004 260 sundancer, 300HP w/bravo 3. At 4000 RPM I used to do 30 MPH. Had to get it bottom painted as this season it is in a slip versus a high and dry. Now at 4000 RPM I get 26-27 MPH and overall the boat feels like it is dragging something all the time (it is not). Is this typical for the effect of bottom paint on performance?