Does anyone know how to find the date of manufacture of a boat by the serial # on the hull? Also, When the boat is on the trailer and I move it it sounds like water inside the hull. What is that all about? Its a used boat and Im new to sailing.Also what is the maximum recommended size of outboard to put on this for when the wind stops blowing and i need to get back to port? Does anyone know where I might get a reprinted owners manual?Or a copy of one? Thanks a lot , Allen