1990 Johnson Evinrude "ES" 40 thru 55, P/N 507872, Page 209Get 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 crankshaft 2Slide 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
f1l f21 3Apply OMC Nut Lock to threads of the retaining screwsInstall and tighten all the screws to the following torques: Gearcase Retaining Screws in screw inscrew 18-20 ftIbs(24-27 Nm) 28-30 ftIbs(38-40 Nm)