Hello - I just bought an old 1994 Marada explorer Deck Boat, 21 feet with Mercruiser 120 HP. I am tyring to figure out if the boat is heavier than it should be, perhaps having water in the hull or wet foam, or if the boat is really just that slow. On a calm day I made a quick stop and a little water came over the front, leading me to believe that maybe it was sitting too low? I don't believe that the spedomoter works, for it never registered a speed. If you know how fast a boat that size should go I would love to know. Thanks so much - Karen