1993 Johnson Evinrude "ET" 90 degrees CV Service Manual, P/N 508285, Page 336Get this manual
Power TrimTilt Servicing Removal 1Mark angle adjusting rod location and remove rod2Lift engine manually and engage tilt support3Remove blue and green wires from pump motor connector housing4Remove spring clip from tilt cylinder pin5Remove tilt cylinder pin with punch and mallet
13l6Manually retract tilt cylinderRemove three screws, port and
starboard, holding the unit to the stern brackets7Remove trimtilt unitPull motor cable through the stern bracketDisassembly Thoroughly clean unit before disassemblingScrub 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 itMount the unit on OMC Power Trim and Tilt Test Stand, PIN 390008Place the unit and stand in shallow tray to catch the hydraulic oil as it drains from the unitNeutralize the internal pressures of the power trimtilt 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