1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 190Get this manual
4Place smaller diameter seal on longer shoulder of Oil Seal Driver (91-31108) with seal lip away from shoulder5Protect lip on front side of bearing carrier using Bearing Installation Tool (91-13945)Apply Loctite 271 on O.Dof sealPress seal into carrier until tool bottoms 8Install O-ring9Lubricate O-ring with 2-4-C wTeflonLubricate seal lips with 2-4-C wTeflon (92-825407A12)Lubricate outside diameter of bearing with light coating of 2-4-C wTeflon10Press bearing into carrier until tool bottoms
21040SealOil Seal Driver (91-31108)Bearing Installation Tool (91-13945)
19163O-ringBearing, Numbered Side Toward ToolSeal LipsBearing Installation Tool (91-13945)