Mercury Mariner 4, 5, and 6HP 4-Stroke Factory Service Manual, Page 21Get this manual

Mercury Mariner 4, 5, and 6HP 4-Stroke Factory Service Manual, Page 21

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MAINTENANCE

When adding or changing gear case lubricant, visually check for the presence of water in the lubricantIf water is present, it may have settled to the bottom and will drain out

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