Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 267Get this manual
19Apply Special Lubricant 101 (92-13872Ato threads of cover nut and face of tab washerInstall cover nut in gear housingVerify that the word and arrow are visibleNOTE: Before torquing bearing carrier cover nut, gear case should either be mounted in stand specifically designed for holding gear cases or bolted to drive shaft housing to avoid possible damage to the gear case20Start cover nut lew turns by handUsing Cover Nut Tool (91-61069) and torque wrenchtorque cover nut to 210 lbft(285 Nm)Wait approximately 30 seconds alter initial torque of 210 lbft(285 Nm)allow nut to stretchand then retorque nut again to 210 lbIt(285 Nm) Water Pump
REASSEMBLvnNSTALLATION 1Apply Loctite 271 to ODof carrier oil seal 23Using suitable mandrel, press oil seal flush into seal carrierInstall a-ring into a-ring groove of seal carrier