Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 144Get this manual
5Place shift cam (Number Side Up) into gear housing and install shift shaft assemblyTorque bushing to 171bft(22 Nm) aTab (Position towards Front of Gearcase)
Forward Gear and Bearing Reassembly
aShift Shaft Bushing Tool (91-23033)Shift ShaftShift Cam (Numbered Side Up)
1Press needle bearing (numbered side toward mandrel) into gear until dimensions (c) is obtained
Lubrication Sleeve Installation