Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 230Get this manual
7Remove bolts which secure crankcase cover to cylinder block 10Using an awl or electric pencil, scribe the cylinder identification number on each connecting rod as shownReassemble connecting rods in same cylindero
55977Crankcase Cover
8Remove crankcase end cap
CRANKCASE COVER REMOVED
11Use 38 in12 point socket to remove connecting rod bolts, then remove rod cap, roller bearings and bearing cage from connecting rod