Re: trailer ?
How high is "up". We don't have a clue because we cannot see your trailer or your boat. We have no idea how "adjustable" the trailer is or what it's weight capacity is. In some cases the winch post can be moved forward provided the tongue is long enough. That may get enough length for a 16 foot boat but it would be a stretch. The end of the bunks must extend past the transom by an inch, if its a roller trailer, the last roller must be under the transom. Make sure the 16 foot boat doesn't exceed the load capacity of the trailer. That capacity is determined by the capacity of the tires (check the sidewall for load capacity), the springs and the capacity of the axle. The lowest value of the three is the weak link and determines the load load capacity. What this means is you cannot install tires with a load capacity of 3000 pounds on an axle with 2000# capacity and expect to haul a 2500# boat.