1972 Johnson 4HP Outboard Motor Service Manual, Page 47Get this manual
DISASSEMBLYOF GEARCASE screws and lift and driveshaft from gearcaseRemove water tube grommet from See Figure 6-4Remove propellerRemove the water
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
GROMMET-_
fSlide gearcase head or bearing retainer from propel1er shaft and remove sealsSpacer high thrust gearcase propel1er 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