Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 184Get this manual
Power TrimGeneral Information Description
The Power Trim System consists of an electric motor, pressurized fluid reservoir, pump, tilt cylinderand two trim ramsThe remote control (or trim panel) has switches that trim
The trim cylinders position the outboard at the desired trim angle in the 20 degree maximum trim rangeThe system will not llow the outboard to be trimmed above the 20 degree trim range as long as the engine RPM is above approximately 2000 RPMThe outboard can be trimmed above the 20 degree maxi mum trim angle (for shallow water operation, etc, by keeping the engine RPM below 2000If the RPM increases over 2000, propeller thrust (if propeller is deep enough) will result in the trim system to return the outboard to the 20 degree maximum trim positionTRIMMING OUTBOARDDOWN(IN) :