Please help! Was walking by my boat today and heard a whining noise. When I checked my boat I found that the tilt motor was engaged and had lowered the motor all the way and was still trying to lower it further. I got in the boat and pushed the tilt button up and down but it did not stop. I then moved to the back and pushed the tilt button on the motor and it still did not stop. I was just about to disconnect the battery when it stopped trying to tilt down. About an hour later I heard the motor engauge again and quit on its own a few minutes later. I then disconnected the battery. I used the boat last week and the tilt and trim worked fine. One of the pistons has been leaking hydraulic fluid and I have to periodically put some fluid back in it. Also is it expensive or hard to have the O'Rings in the pistons replaced. The motor is a 2002 Evinrude FICHT 150 with factory tilt and trim. Thanks in advance for any help.