1995 Mariner Mercury Outboards Service Manual 50HP 4-Stroke, Page 131Get this manual
Camshaft Oil Seal Installation 1If removed, install Oil SealPosition seal so part number side in facing outward Press seal in until it makes contact with inside flat surfaceLubricate seal lips with oil
NOTE: Rotate camshaft after assembly to ensure it rotates smoothly
Camshaft Installation
123Apply engine oil to the main journals (5 places) on the camshaftSlide camshaft into cylinder head (threaded end towards driven gear)Install camshaft retaining boltTighten bolt to the specified torque Place driven gear on camshaft so alignment pin is in holeHold gear with tool (91 -83163M) andfasten with washer and boltTighten bolt to the specified torqueRemove any oil from the camshaft lobes and apply Moly Grease to the lift portion of the lobesObtain Moly Grease from local source5