1975 Johnson 4HP 4R75, 4W75 Outboards Service Manual, Page 50Get this manual
REASSEMBLY OF GEARCASE NOTE When the use of "oil" is specified, we recommend OMC Sea-Lube Premium Blend Gearcase LubeaInstall new seal in the top of the gearcaseApply light coat of OMC Gasket Sealing Compound Part Number 317201 on the outside diameter of new seal and press seal into the gear case head or bearing retainerLubricate and place new "0" ring in position on gear case headbOil the propeller shaft and slide the gear case head or bearing retainer onto the shaftcPlace the pinion gear in position in the gear case and the thrust bearing used with the weedless gearcaseThe thrust bearing has small boss on the bottom side which must fit in between two bosses in the gearcaseInstall driveshaft in gear housingdInstall the propeller shaft with gearcase head or bearing retainerThe gearcase head used on the