Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 308Get 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 boataClamps
2Raise outboard to full "Up" position and engage tilt lock lever53791Tilt Lock LeverSupport ToolRetaining Clips
IMPORTANT: Support outboard as shown above to prevent engine from tipping when power trim retaining pin is removed