1994 Johnson/Evinrude "ER" 60 thru 70 outboards Service Manual, Page 203Get this manual
Water Pump Servicing If the gearcase has been in service for any length of time, it is good policy to install water pump repair kitTo install the repair kit, proceed as follows:
Removal
LJ the gearcase
1Remove the four screws retaining the impeller housing to
2Slide the water pump assembly off the driveshaftRemove the impeller drive camimpeller plateand impeller plate gasket Discard the gasket