1990 Johnson Evinrude "ES" 40 thru 55, P/N 507872, Page 151Get this manual
r:;;l 37Install the lower crankcase headApply OMC Gasket Sealing Compound to threads of the retaining screwsInstall screws finger tight
38Starting at the center, torque all main bearing screws in stages to 18-20 ftIbs(25-27 Nm)36 39Temporarily install the flywheel and key to rotate crankshaft and check for binding
Install the eight flange screws and torque screws to 60-84 Ibs(7-9 Nm)