Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 194Get this manual
Power Trim Assembly Removal and Installation Removal
1Remove clamps on transom bracket to free power trim wiring
Failure to support outboard as shown could result in personal injury andor damage to outboard or boat
a Clamps
Raise outboard to full lever
position and engage lill iock
aTilt Lock Lever
bSupport ToolRetaining Clips
IMPORTANT: Support outboard as shown above to prevent engine from tipping when power trim retaining pin is removed SUPPORT TOOL 38 indiameter metal rod (a used shift shaft works well)