Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 129Get this manual
General Information Powerhead "Disassembly" and "Reassembly" instructions
are pri nted in sequence that should be followed to assure
best results when removing or replacing powerhead componentsIf complete disassembly is not necessary, start reassembly at point disassembly was stopped (Refer to "Table of Contents," preceding
Powerhead Removal from Driveshaft Housing
1Disconnect battery cables from battery terminals
Disconnect fuel tank hose from outboard Remove top cowlingRemove two screws which secure remote control harness retainer and remove retainer