1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 144Get this manual
21Remove piston pin needle bearings (29 per piston pin) and locating washersper piston) as shownIMPORTANT: We recommend that you use new needle bearings at reassembly for lasting repairHowever, if needle bearings must be re-used, keep each set of bearings identified for reassembly on same connecting rod 23Press crankshaft out of bearing, as shown
51088Locating Washers
22Inspect crankshaft bearingOnly if removal is necessary, remove retaining ringusing pair of snap-ring pliers