Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 232Get this manual

Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 232

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4 Note the color of gear lubricantWhite or cream color indicates presence of water in lubricantCheck drain pan for water separation from lubricantPresence of water in gear lubricant indicates the need