Xpress Spanky or anyone else. I have a 1996 h-51 rated for a 115 hp. Bought it used but in great shape. Put a new 115 hp optimax pro sx 2-stroke with a 21 p trophy plus prop at 4 3/4 under pad with a 6" manual jack plate. Boat is very hard to steer when it's trimmed down and I can not trim very much before it starts to porpoise very bad at 5000 rpm. What can I try next? Raise the motor up some. 10" jack plate. Help Please.