1986+ Mercury 6/8/9.9/10/15HP 2-stroke Factory Service Manual, Page 239Get this manual
GEAR HOUSING
4If necessary, press bushing from gear using Bushing Removal Tool
91-824787 53020
aBushingBushing Removal Tool (91-824787) IMPORTANT: If FORWARD gear tapered bearing or race requires replacement, replace bearing and race as set