1987 Johnson/Evinrude CU Outboards 35A thru 55 Service Manual, Page 315Get this manual
Removing the Power Trim and Tilt Unit INotel 12the power position before removingand tilt unit to full trim-in
Back the manual release valve out two full turnsDisconnect the four wire connector
3Remove the shoulder screw, two washers and two bushings from the ends of the trim and tilt cylinders4Remove the four screwslockwashers and flat washersLift the power trim and tilt unit away from the motor
Disassembly and Reassembly of the Power Trim and Tilt
It is necessary that the outside surfaces of the unit be completely free of all dirt, barnacles, flaking paint or anti-fouling paint prior to disassemblyOne method for cleaning the unit is to scrub all outside surfaces with stiff bristle brush and hot soapy waterThis will prevent dirt particles or other foreign matter from entering the unit while you are working on itNeutralize the internal pressures of the power trim and tilt unit before disassemblingUsing battery, operate the unit until the trim and tilt cylinders are completely downReverse the connections on the battery and momentarily operate the unit