Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 207Get this manual
2Align tilt ram and housing using alignment tool MOTOR AND PUMP REPLACEMENT IMPORTANT: The pump is not rebuildableIf pump is defective, replace as an assemblyNOTE: Power Trim System does not have to be removed from outboard to replace pump or motor
1Tilt outboard to full "UP" positionDepressurize power trim systemand loosen starboard transom bracket as outlined inRemoval and Installationon pages 59-13251348
Remove screws to remove motor from system
NOTE: Drive shaft is loose part and may fall out of motor when motor is removed