1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 265Get this manual
NON BIGFOOT GEAR HOUSING
IMPORTANT: If FORWARD gear tapered bearing or race requires replacement, replace bearing and race as set
NOTE: DO NOT remove tapered bearing from FORWARD gear unless replacement is necessary as removal process will damage bearing5Inspect FORWARD gear tapered bearing and race for rust, roughness or excessive wear (looseness)6If bearing is in serviceable condition, DO NOT remove bearing from gear as removal process will damage bearing7If bearing must be replaced, remove bearing from gear using Universal Puller Plate (91-37241) and suitable mandrel (58 insocket)53008