Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 232Get this manual
IMPORTANT: Warming the piston dome using torch lamp will ease removal and installation of piston pin18Support piston and tap out piston pin using service tool (91-92973A 1) as shown 20Remove and discard O-ring seal from end cap21Remove oil seals from end cap by driving seals out with punch and hammer
51849O-ringSeals (2)
22Inspect roller bearing in upper bearing carrier as outlined in "Cleaning and Inspection"55957Piston PinPiston Pin Tool (91-76159A 1)
NOTE: If roller bearing is damaged, replace bearing carrier assembly