I replaced my old 30 hp, 2-stroke Evinreude with a new Honda 30hp, 4 stroke. I used these motors on the same 14' Lund Laker. The old Evinrude clearly had more high end speed. I have tried three new pitched props and while top end speed is better nowthan with the original prop, it is still quite a bit slower than my old Evinrude.I love the Honda for a ot of reasons but speed is not one of them. Any ideas what wrong?