1990 Johnson Evinrude "ES" Cross V 88 thru 115, 150 thru 175, P/N 507874, Page 342Get this manual
Power TrimTilt Servicing Removal
1Mark angle adjusting rod location and remove rod 2Lift engine manually and engage tilttrail lock3Remove blue and green wires from pump motor connector housing
[!] Remove spring clip from tilt cylinder pin 5Remove tilt cylinder pin with punch and mallet
6Manually retract tilt cylinderRemove three screws, port and starboard, holding the unit to the stern brackets7Remove trimtilt unit, as shown, and pull control cable through stern bracket
Disassembly
Thoroughly clean unit before disassembling 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 itMount the unit on OMC Power Trim and Tilt Test Stand, PI N
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 disassembling Using battery, operate the unit until the trim and tilt cylinders are completely downReverse the connections on the battery and momentarily operate the unit