The cooling system is in two parts. The fresh water, closed loop system, and the raw water, open end system. The closed loop system uses a combination of fresh water and anti-freeze for the cooling medium. Beginning at the outlet of the Heat Exchanger (16/1), the coolant flows through the hose (16/17) into the rear, upper left corner of the Generator Housing (14/15).

After circulating through the Generator Housing, it flows from the lower front, right side of the Generator Housing,

through the Oil Cooler (2/8) in the base of the engine, to the input side of the Fresh Water Pump (front pump 15/9).

The pump pushes the coolant across the front of the engine to the Bypass Tee (15/17) connection on the cylinder. A portion of the mixture goes into the cylinder cooling passages, up through the cylinder ports (7/25) and into the cylinder head cooling chamber.