Westerbeke W-46 - Page 57

COOLING SYSTEM
(FRESH AND RAW WATER)
TO HOT WAT~R TANK
1. Fresh Water Circuit
INCOMING RAW WATER
Refer to the illustration above. Fr~~l'! water coolant is cir-
culated through the circuit by the belt-¢lriven fresh water pump
mounted on the front of the engine block.
The circulating pump draws coolant from the discharge side of the
heat exchanger and moves it through the engine block/head. The
thermostat, located in a housing at the top forward part of the
cylinder head, controls the operating temperature of the engine by
opening and closing to regula.te coolant flow through the engine
block/head.
The coolant passes through the opened thermostat and the exhaust
manifold to the lower discharge of the manifold through the lube
oil cooler. The coolant then passes through the domestic water
heater flow controller and into the engine's heat exchanger, where
it is finally cooled by the raw water circuit.
Engines & Generators
55