Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 18Get this manual

Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 18

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Corrosion Control Anode The gear case has two corrosion control anodesAnother anode is installed on the bottom of the transom bracket assemblyAn anode helps protect the outboard against galvanic corro