any input on real world use in the lakes as far as using tubes and maybe a bit of ski or wakeboarding. Does the 4.3 have enough juice to allow me to do most water sports. Boat is a 18-6 wellcraft bowrider 1991. Other choice is a 1989 reinell with the 350. both have merc outdrives, both seem to be well maintained. may have an occational trip in the ocean. thanks for any input.