1970 Johnson 1.5 HP Outboard Motor Service Manual, Page 41Get this manual
WATER PUMP SCREWS
GROMMET
GEARCASE
OIL SEAL
PROPELLER SHAFT AND DRIVE GEAR ASSEMBLY
GEARCASE HEAD
Figure 6-5Water Screws
Figure 6-6Removing Water
Figure 6-7Gearcase Components
Slide gearcase head off of shaft and remove sealRemove pinion gearSee Figure 6-7NOTE Driveshaft bushing in gearcase is not servicedIf worn, place gearcaseCLEANING, INSPECTION AND REPAIR