Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 17Get this manual

Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 17

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Flushing The Cooling System Flush the internal water passages of the outboard with fresh water after each use in saltpolluted or muddy waterThis will help prevent buildup of deposits from clogging the

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