1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 254Get this manual
NON BIGFOOT GEAR HOUSING
Disassembly
IMPORTANT: It is recommended that, during complete disassembly of gear housing, all O-rings and oil seals be replaced, regardless of their appearance
Bearing Carrier
1Remove bearing carrier (LEFT HAND thread) using Bearing Carrier Tool (91-13664)91-13664