Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 434Get this manual
LEFT HAND NON-RATCHETING
REVERSE GEAR AND BEARING CUP ADAPTOR REASSEMBLY
1With reverse gear teeth facing down, use mandrel (91-86943) to press propeller shaft needle bearing (NUMBERSLETTERS UP) into reverse gear until short shoulder on mandrel bottoms on reverse gear
NOTE: If gear housing has been replaced or inspection determines that reverse gear bearing adapter must be replaced, assemble and install as follows:
2Place reverse gear roller bearing (NUMBERLETTERS UP) in pressUsing suitable mandrel, press bearing cup adapter onto reverse gear bearing