1971 Johnson 40HP outboards Service Manual, Page 59Get this manual
hRemove oil retainer from top of gear case using seal puller (Special Tool #377565) and extractor (Special Tool #301927)Remove upper gearcase bearing, using bearing remover (Special Tool #309916) iDrive propeller shaft oil seal out of housing, and remove "0" ring CLEANING, INSPECTION, AND REPAIR
aClean all parts with cleaning solvent such as Solvasol and dry with compressed airbDiscard all oil seals, "0" rings, and gasketsDiscard driveshaft bearing, as the thin steel case housing the needles will be damaged in removal
Figure 6-9Removing Water Pump and Driveshaft
PIVOT PIN
Figure 6-10Pivot Pin and Gearcase Attaching Screws
dSwing shifter lever aside and remove clutch dog cradleSee Figure 6-11eThe propeller shaft with all components can be lifted out as unitAvoid losing detent balls and spring when removing clutch dog and other components from the propeller shaftSee Figure 6-11Remove carbon from shift rod and remove shift rod from gearcasefRemove pinion gearused in the pinion bearing