Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 222Get this manual
15Torque gear housing retaining bolt and nuts to 40 lbft(54.0 Nm) 16Apply Loctite Grade "A" on anode plate retain ing boltand install anode plateTorque plate retaining bolt to 180 lbin(20.0 Nm) Propeller Installation
AWARNING
When installing or removing propeller, because ot the motor's ease in starting, be sure that the remote control is in neutral postilon and that the key switch isOFF "Place block otwood between the anti-cavitation plate and propeller to prevent accidental motor starting and to protect hands from propeller blades while removing or installing nut1Apply liberal coat of one of the following Quicksilver products on propeller shaft splines- Special Lubricant 101 (92-13872A1)2-4-C Marine Lubricant (92-90018A 12)PerfecI Seal (92-34227- 1) 2Place forward thrust hub over propeller shaft with shoulder side into propeller3Place propeller on propeller shaft and slide it up against th rust hub