Marine Closed “Freshwater” Cooling Systems Unlike in a car where the antifreeze/water circulates through an air-cooled radiator, a closed cooling system uses lake or ocean water flowing through a heat exchanger to remove heat from the engines cooling water/antifreeze mixture.Click to see full answer. Keeping this in consideration, how does a Mercruiser cooling system work?Fresh seawater is normally drawn by a belt driven pump from a thru hull fitting in hull of boat on inboards, or by water pump in stern drive through the lower unit water passages on an inboard/outboard, and then exits the boat through the exhaust. Figure 2 shows the typical “enclosed” cooling system.Secondly, how does a outboard motor cooling system work? An Outboard Cooling System. As gasoline is burned in an outboard motor, the temperature quickly rises in and around the piston and cylinder. The water comes into the outboard’s engine through the lower unit, which is below water level as the boat is moving. Thereof, what is closed cooling system? In a closed system, water circulates in a closed cycle and is subjected to alternate cooling and heating without air contact. Closed systems are also widely used in air conditioning chilled water systems to transfer the refrigerant cooling to air washers, in which the air is chilled.How do you winterize a closed cooling system?Shut down and replace the oil, filter and fuel filter. Fully drain the raw-water side of a closed-cooled engine, including the manifolds, seawater pump and heat exchanger. Drain-plug locations vary by engine, so check your manual. Disconnect the raw-water inlet hose, then remove the drain plugs.
How does a closed cooling system work on a boat?
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