I've been getting by with this issue with the hydraulics for some time, but it is irritating. With the stern in the travel position, it only takes a day or two, and it gradually falls down to the "0" or vertical. Also, with the boat in use, I observe the number on the power trim panel, which shows the stern gradually creeping up. This creates the need to be correcting the stern pitch fairly frequently, which is bothersome. Wondering if this points to any one issue/component, or will I just have to overhaul the system? Thanks for any help.