2004 SR Johnson 2-stroke 40, 50HP Service Manual, Page 201Get this manual
POWERHEAD ASSEMBLY Position the crankcase on the cylinder blockInstall all main bearing screws and nuts finger tightUsing soft face mallet, lightly tap bottom of the crankshaft to seat the lower main bearingWhen the crankcase is seated, install and firmly seat the crankcase taper pinLightly coat new crankcase head O-ring with Triple-Guard grease and install itInstall the crankcase headCoat the threaded portion of the crankcase head screws with Gasket Sealing CompoundInstall the screws finger tight