1978 Evinrude Outboards 9.9/15HP Service Manual, Page 92Get this manual
Figure 6-59Gearcase Pressure Test Figure 6-56Measuring Shift Rod Height, Top of Connector to Gearcase psi (110124 kPa)If pressure does not hold, submerge gearcase in water and check for source of leakageMake necessary repairs and repeat testcScrew in vacuum testerPump out to 3-5" of mercury and see if vacuum holdsThen pump out to 15" of mercury and checkIf gearcase fails to hold on either test, put oil around suspected sealIf leak then stops or oil is drawn in, that seal is defectiveWhen gearcase checks out ok, refill with lubricantSee Section 2, Lubrication ChartdCoat propeller shaft splines with OMC Gasket Sealing CompoundPlace thrust bushing in propeller and then slide assembly onto propeller shaftSee Figure 6-60Install thrust washer on shaft splineInstall and tighten propeller nut finger tight and then tighten to align next cotter pin hole Install cotter pin (use new pin if necessary), bending ends over nutCOTTER PIN NUT
Figure 6-57Installing Impeller Over Key 13Install cup, new seals, and grommet in impeller housing and slide down driveshaftSee Figure 6-58Oil impeller bladesWhile turning driveshaft in clockwise rotation, slide impeller housing over impellerDip screws in OMC Gasket Sealing Compound and install, two short aft, two long forwardTorque to speCifications, Section 2