The trim motor on my 1990 120VRO is badly rusted as are most that I've seen. Decided to change before problems begin. There are three screws. One which is againt the transom and un-accessable. Is there a trick to changing this motor? It looks like the whole assembly will pivot forward if I disconnect the main piston. Any advice would be most appreciated. <br /><br />Thanks in advance for your replies............