I have a 1998 19' Bayliner Bowrider with a 3.0L 135HP Mercuriser with Alpha One Drive. I'm considering going from the Merc Black Max 21P aluminum I have now to a Solas 4BLD SS 19P to get more out of the hole for skiing and tubeing. I'm getting about 42MPH @ 4600 rpm now on smooth water, a...