Tilt Trim Problem 1976 85hp merc

[wjcap4]

Have 2 solenoid twin cylinder type system. Won't hold motor up for more than 1/2 hour. Any suggestions?

 

[racerone]

Fliud level is OK ?????----------Sounds like a problem with the manual release valve ------------if that is tight you may have to look into repair kits for the cylinders ( internal leakage )