1994 Johnson/Evinrude "ER" 9.9 thru 30 outboards Service Manual, Page 232Get this manual
Water Pump Servicing9.915 Disassembly 1Remove gearcase from exhaust housing as described in Gearcase Servicing, this Section
[TI 2Remove the four impeller housing screws3Remove the impeller housing and impeller by sliding them up and off the driveshaftThen remove the impeller drive pin and impeller plate 4Remove and discard the water tube grommet, O-ring, and seal in the impeller housing5Inspect the impeller, housing, and plate for excessive wear6Clean the impeller plate and gearcaseAssembly
r:;l 1Apply OMC Gasket Sealing Compound to the metal casing of new driveshaft seal Install the seal in the impeller housing with lip of seal facing into the housing