1970 Johnson 1.5 HP Outboard Motor Service Manual, Page 11Get this manual
LUBRICATION POINT 1Gearcas See Figure 2-2 FREQUENCY (PERIOD OF OPERA TION) FRESH WATER #-SALT WATER Check level after first 10 hours of operation and every 50 hours of operation thereafterAdd lubricant if necessaryDrain and refill every 100 hours of operation once each season, whichever occurs first2Steering Handle Pivot See Figure Throttle Carburetor and Choke Linkage See Figure 2-4 4Clamp Screw See Figure 2-5 #- Some areas 60 days 60 days Same as Fresh Water
LUBRICANT
Same as Fresh Water days days
60 days require more frequent lubrication