1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 129Get this manual
a Drive Gear Adapter Assembly O-rings Oil Pump Assembly Sta-Straps
abcdef ghi kl mOil Tank Oil Cap Assembly Oil Tank Neck Bracket Swivel Base Swivel Bushing Oil Tank Neck Boot Oil Tank Base Boot Oil Tank Base Grommet Bolt [Torque to 160 lbin(18.1 Nm)] Sta-Straps Switch Assembly (Without Warning Module) Switch Cover
Oil Pump Assembly