This is a new boat for me and this morning I extended the tilt/trim up to a full position. Motor is up as far as it will go manually or otherwise. The problem is it will not go down. I know this is a beginner question, but I could use a little mentoring here. I cannot see a lock of any kind, but is there something I am missing? the pump runs in both directions, but no movement. It is a 1992 Force 120 hp. thanks in advance, Erik.