Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 133Get this manual
REMOVING ENGINE COMPONENTS
Powerhead Disassembly
1Place powerhead in repair stand or on bench2Remove thermostat covers, thermostats and gaskets
Remove the following engine components:
Section 2
Starter Motor Alternator Stator Ignition Modules Electronic Control Unit Solenoids Crank Position Sensor Throttle Position Sensor Temperature Sensor