i have a 1992 lowe with a 75 hp merc. when i was on the water the upper pin in the cyl. came out part of the way and locked up the cyl. i did not find this out until back on the trailer. now i can raise the tilt all the way up and when i let it down the pump squeals and the motor goes down slow and stops before it gets all the way down. then i have to open the manual relase to get it the rest of the way down. also it goes up just fine but if i let it down at all it wont go up again until i open the manual release and close it again. anyone have any ideas. i am a maintence man by trade i am sure i can take it apart and put it back together but i am not sure what to look for.

Must be an internal valve stuck open or not seating properly inside hydraulic unit.

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i took the valve body off and found the rocker had been bent and broken at one time. someone had tried "brazing" it back together. i ground off the weld and tigged it re-installed it and works like new. i will order a new one and replpace it asap but this get me back on the water!!!

thanks for your help!! i am new to this site and outboards.
its great site with all the info i needed so far and the parts list and diagrams are great too!!