1990 Johnson Evinrude "ES" 9.9 thru 30 Service Manual, P/N 507871, Page 262Get this manual
Servicing the 7.5 in(19 cm) Gearcase Extension10,14,25 Comm rv
1Using flat blade screwdriver, pry up on the upper driveshaft sealRemove and discard the seal
2Using OMC Driveshaft Bushing RemoverInstaller PIN 330334, remove the bushing and lower driveshaft seal from the extensionWith mallet, drive the bushing and the seal out of the extension Discard both parts
3 Insert the pin of the tool through the drive portion of the toolApply OMC Triple-Guard grease to new bushing and place the bushing on the toolFrom the gearcase end of the extension, drive the bushing into position until the pin contacts the extension 4Attach OMC Driveshaft Seal Installer PIN 330335 to the OMC Drive Handle PIN 378737Apply OMC Gasket Sealing Compound to outside case of two new drives haft sealsPosition one seal onto the installer with lip facing the toolInstall the seal into top of the extension until seal is seatedPosition the remaining seal into the installer with lip facing the toolInstall the seal into bottom of the extension until seal is seatedU