Well that is a long story (speed).Bought the 2003 boat in June and the best speed has been 47gps w2 people all, three batteries, equipment, anchor, and 1/2 tank gas (20p SS by powertech).This is trimed out to neutral steering. I can get more speed by trimming more but it wants to pull hard to the left. I think it should do better. The motor is mounted in the fourth hole up so it sets way deep, this spring I am going to move it up to the second hole maybe even the first hole. I have also purchased a Lazer 22p prop. According to most charts I should get 51 - 52gps.