I personally wouldn't go out in a boat that couldn't handle the weight
of a 15 hp engine. The thrust of a 2 hp is probably a greater force than
gravity on a 110-120 lb motor.

I'm going to suggest this motor
http://www.minnkotamotors.com/produc...unt/endura.asp

And one of these for everyone on your boat
http://www.baotersworld.com/webapp/w...tegory=5771551

The problem is that the transom is a little ... umm .. soft and I am
worried the 15HP is too heavy.