1995 Mariner Mercury Outboards Service Manual 50HP 4-Stroke, Page 207Get this manual
Suction Seat Installation 1Install new, lubricated a-rings on suction valve assemblySuction seat assembly:
Install corresponding poppet, spring and plug From the opposite side of the manifold, install spool and seat using 932" or mm socket on OUTSIDE diameter of seatInstall remaining poppet, spring and plugTorque plug to 120 lbin(13.5 Nm)
Oil Pump Installation
1Install down relief ball and spring into manifold cavityInstall pumpfilter assemblyTorque screws to 70 lbin(7.9 Nm)6)
a Filter Suction Seat Ball Plug