Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 66Get this manual
Ignition Components Removal and Installation Flywheel Cover removal and installation
1997 MODELS: Removal
ELECTRONIC CONTROL MODULE (ECM) Removal
1Remove top cowling2Disconnect ECM harness connectors3Remove bolts securing ECM
Remove flywheel cover by lifting offDisconnect vent hose (a)Installation
Reconnect vent hose (a) to fitting in flywheel coverInstall the flywheel cover by inserting the two front pins into the front mounting holes, and then pushing the cover down onto the rear pin and air intake tube (b) for the air compressor