Inboard Motors Mercury Mercruiser 1964-1991 service manual, Page 346Get this manual

Inboard Motors Mercury Mercruiser 1964-1991 service manual, Page 346

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COOLING

Engine overheats with fresh-water-cooling in addition to above 1- Closed cooling system reservoir level low 2- Plugged exchanger Too much anti- freeze in 4- Fresh water improperly