1990 Johnson Evinrude 120 thru 140, 185 thru 225, 300 HP, P/N 507875, Page 201Get this manual
35Lower the crankcase into place23 36Install the main bearing screws finger tight241 37When the crankcase taper pinis seated, install and firmly seat the
1251 38Torque main bearing screws in stages to 26-30 ftIbs(35-41 Nm)Begin with the center screws and work outward in spiral pattern39Install crankcase flange screws and torque to 60-84 inIbs(7-9 Nm)40Apply OMC Locquic Primer and OMC Nut Lock to the upper and lower crankcase head screws and install themTorque them to 72-96 inIbs(8-11 Nm)41Connect all crankcase recirculating hoses and Power Boost cooling hosesSecure cooling hoses with tie straps261 42Install new intake manifold gasket(s) dryInstall intake manifold(s)On V6, V8 models install upper manifold first, then the lowerTorque all screws 60-84 inIbs(7-9 Nm)43Install throttle cam on intake manifoldLubricate cam and stud with OMC Tripe-GuardgreaseTorque nutto 144-168 in.lbs(16-19 Nm)271 44Install new air silencer base gaskets dryInstall the fuel systemTorque all air silencer base retaining screws to 96-120 inIbs(11-14 Nm)281 45Install new carburetor gaskets dryInstall the screws and nuts securing the carburetorsTorque all fasteners to 120-144 inIbs(14-16 Nm)46Install carburetor throttle shaft connector link, washer, and retaining clip