I have found a geat deal on a 2003 Johnson, 15hp, 4 stroke, for my 14' SeaNymph aluminum boat. I'm a big guy, 300 or so, and am concerned about whether or not it will get the boat up out of the water. I have a 4hp 2 stroke now, so I have very little to compare it with. I'm no speed deamon, so that's not an issue. ant thoughts out there?<br /><br />Thanks