1995 Mariner Mercury Outboards Service Manual 50HP 4-Stroke, Page 203Get this manual
7 Remove memory piston from cylinder using locking pliers (Craftsman PIN 4735) or suitable toolInstall new lubricated a-rings on end cap and piston
aEnd CapPistonO-ring
Trim "Motor" Removal
18Remove a-ring from memory piston2Secure power trim assembly in soft jawed viceRemove screws securing motor assembly to manifoldRemove trim system from vice and empty fluid into appropriate container