1971 Johnson 4HP Outboard Motors Service Manual, Page 47Get this manual
DISASSEMBLV OF GEARCASE Remove propellerRemove the water screws and lift and driveshaft from gearcaseRemove water tube grommet from See Figure 6-4
Remove the two screws holding the gearcase head or bearing retainer to the gearcaseRemove gearcase head or bearing retainer withdrawing the propeller shaftSee Figures 6-6 and 6-7
fSlide gearcase head or bearing retainer from propeller shaft and remove sealsSpacer high thrust gearcase propeller shaft removedSee Figure 6-6
gThe high thrust gearcase gear slides outremove the weedless gearcase pinion gear, it is first necessary to remove thrust bearingSee Figure 6-7the gearcase bench or insert the driveshaft and tap the end of it to dislodge the bearingPinion gear then removed