1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Manual, Page 156Get this manual
37Install the lower crankcase headApply OMC Gasket Sealing Compound to threads of the retaining screwsInstall screws finger tight38Starting atthe center, torque all main bearing screws in stages to 18-20 ftIbs(25-27 Nm)1361 39Temporarily install the flywheel and key to rotate crankshaft and check for binding 1371
Install the eight flange screws and torque screws to 60-84 Ibs(7-9 Nm)