1986+ Mercury 6/8/9.9/10/15HP 2-stroke Factory Service Manual, Page 244Get this manual
GEAR HOUSING
Forward Gear Bearing Race Installation
Install race into housing using Mandrel and Bearing Carrier Tool
91-13664 53017
91-13658 53016 52992
aRaceMandrel (91-13658)Bearing Carrier Tool (91-13664)