1998 Johnson Evinrude EC 5 thru 15 HP Four Stroke Service Manual, Page 274Get this manual
Assembly
1Using socket, install new gearcase head sealApply DPL Penetrating Lubricant to the casing of the sealThe seal should be installed with the letters facing outwardTap seal in until seatedApply OMC Triple-Guard grease to the seal lips
2Apply OMC Gasket Sealing Compound to the outside diameter of two new gearcase cover sealsInstall the seals back-to-back on OMC Seal Installer, PI 326547Then press them into the gearcase cover until they are flushApply OMC TripleGuard grease to the seal lips