1974 Johnson 135 HP Outboard Motors Service manual, Page 76Get this manual
REMOVAL OF GEARCASE
The gearcase assembly may be removed from the exhaust hou Sing and power head as foll ows: Disconnect batterybDrain lubricant from gearcase and remove propellercDis connect shift rod cOim ecto om belle rank by loosening belle rank screwSpread belle rank halves apart and disconnect hift od connector from be llcrankSee Figure 6-7dMark gearcase and adjustable trim tab it can be reinstalled in the same position Re move scr ew and trim tabSee Figure 6-8