Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 18Get this manual

Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 18

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Corrosion Control Anode Your outboard has four corrosion control anodesAn anode helps protect the outboard against galvanic corrosion by sacrificing its metal to be slowly eroded instead of the outboa