1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Manual, Page 214Get this manual
Installation 1Coat the driveshaft splines with OMC Moly LubeDo not coat the top surface of the driveshaft as lubricant here may prevent seating of the driveshaft in the crankshaft2Slide the gearcase into place making sure that the driveshaft engages the crankshaft and the water tube of the inner exhaust housing enters the water pump rv
3Apply OMC Nut Lock to threads of the retaining screwsInstall and tighten all the screws to the following torquesGearcase Retaining Screws inscrew inscrew 18-20 ftIbs(24-27 Nm) 28-30 ftIbs(38-40 Nm)