1986+ Mercury 6/8/9.9/10/15HP 2-stroke Factory Service Manual, Page 223Get this manual
GEAR HOUSING
7Mandrel 91-13658T
8Bushing Removal Tool 91-824787
9Seal Installation Tool 91-824785T1
aSealBushing Installation Tool 23-824786 10Expanding Rod (SNAP ON PN CG40-4)