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Mercruiser 3.7l 4cyl 470/170hp engine - YouTube
Mercruiser 3.7l 4cyl 470/170hp engine Mercruiser 165 running idle
Mercruiser 165 running idle - YouTube
Mercruiser 3.7l 4cyl 470/170hp engine - YouTube
Closed Cooling System - Mercury OEM Parts - iboats.com