I have a 96 Mercury 60 hp elpt with power hydraulic trim. When I push the trim up button, the pump sounds as if it is running, but nothing moves. I can lift the motor manually if I push the up button on the motor AND lift it with my arms (heavy!) I admittedly am no mechanic, but am willing to learn. Is this a simple matter of needing hydraulic fluid? I read on the motor that one should not open the reservoir unless the motor is fully up - this is difficult since it is so heavy I can only partially lift it. Even if I were able to lift it, I'm not sure I know how to check or replace the fluid. I have looked for an online owners manual, but cannot find one. I'd greatly appreciate any help: tia Dave