1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 158Get this manual
S Install ring seals into slot between each center main bearing and position ring seal end gaps 180_ apart Grease crankshaft journal with Needle Bearing Assembly Lubricant, to hold bearings in placePosition bearings on journal, 32 each center main bearing
Attach bearing races with holes toward lower gear end of crankshaftSecure each main bearing race with retaining ring
20040Main Bearing RaceRetaining RingTop Main Bearing
RING SEAL Each Center Main