I have a 1999 Aquasport 215 with a 1999 Evinrude 200 hp ficth motor. The motor wont run right, runs fine up to 3000 rpm then bogs out. had everything mecainal done to it. Cant seem to find any place to work on ficht motors. So i am thinking about a new or used motor. but not sure of what to get Mercury, yamaha evinrude ect.When my old motor ran good it would push my boat at 48 mph. If i go with a 225 hp how much faster would it go also. 2 or 4 stroke?