🔍 Key Concepts

• Relationship between raw water pressure and flow restrictions in an open cooling system • What a sea strainer does in a diesel cooling system • Which listed problems are internal engine faults vs. external supply-side issues

💭 Think About

• Ask yourself: low raw water supply pressure usually means what is happening to the flow between the sea and the pump? • Which component in the list is the first one the water encounters coming from outside the vessel? • Which options (head, head gasket, thermostat) affect engine temperature but not necessarily the incoming raw water pressure at the pump inlet?

✅ Before You Answer

• Verify which device is specifically designed to filter debris from seawater before it reaches the pump and heat exchanger. • Check which choice would most likely cause a restriction on the suction side of the raw water pump. • Eliminate the options that are primarily combustion side / internal engine damage rather than cooling-water supply components.