I'm trying to give some life to this thread because I'm pretty much wondering the same thing. I need a 9.8 hp engine and the four strokes weigh 81 lbs. I'm afraid that might be too much to carry, even for short distances. It's awfully hard to find 2 strokes in the US.
For you, the difference between 114 and 157lbs seems like a lot. I usually go with the most horsepower I can get, but I would think you'd need two people to pick up a 157 lb engine and put it on the transom. Even 114 lbs seems like a lot. You must be pretty strong buddy.