1992 Johnson Evinrude "EN" 40 thru 55 Service Manual, P/N 508143, Page 222Get this manual
1271 27Carefully apply OMC Gasket Sealing Compound to the O-ring flange and aft support flange of the propeller shaft bearing housing28 28Apply OMC Needle Bearing Assembly Grease to the reverse gear thrust washerPlace the thrust washer in the propeller shaft bearing housing29Install the propeller shaft bearing housing in the gearcase with screw holes in vertical position and drain slot facing down 1291 30Apply OMC Nut Lock to threads of the propeller housing retainer screwsInstall the retainers and tighten the screws to torque of 120-144 inIbs(14-16 Nm)1301 31Before installing lubricant, pressure test and vacuum test the gearcase as follows: Remove the oil level plug, and screw in pressure test gauge Pump up pressure to 3-6 PSI (21 -42 kPa)If pressure gauge indicates leakage, submerge the gearcase in water to determine source of leakage as evidenced by bubblesIf the gearcase pressure gauge does not indicate leakage, increase pressure to 16-18 PSI (110-124 kPa)If pressure does not hold, submerge the gearcase in water and check for source of leakageMake necessary repairs and repeat test Screw in vacuum testerPump out to 3-5 in(76-127 mm) of mercury and see if vacuum holdsThen, pump out to 15 in(381 mm) of mercury and checkIf the gearcase fails to hold on either test, put oil around suspected sealIf leak then stops or oil is drawn in, that seal is defectiveWhen the gearcase checks OK, refill with the proper lubricantU