Hi! I have a 87 Mariner 1987 135 hp<br />The trim tilt pump has started to leak.<br />It seems to leak mostly when the motor is<br />in the down position (although occassionally when it is tilted all the way up too) Leaks<br />bad when motor is down, you can see fluid in the water. My question is this, any certain seals orings to change, or should I just change every seal? No work has ever been done on unit since new.