I bought a 1998 merc tracker 25hp 2 stroke. The hook that keeps the motor from tilting in Neutral and reverse won't release when the motor is put in Drive. I have to manually reach down and push it up in order to pull my motor up. This is a problem because I travel in shallow water with stumps and rocks so I really need the motor to be able to tilt upon Impact. See the attached pictures. Am I missing a part or could the mechanism that pulls the hook up just be gummed up??