Seacock - Mercury Inboard 5.7L Manual

3. Coat the terminal connections with a battery terminal anti‑corrosion agent.
4. Perform all the checks in the before starting column of the Operation Chart.
Overheating from insufficient cooling water will cause engine and drive system damage.
Ensure that there is sufficient water always available at water inlet holes during operation.
5. Start the engine and closely observe instrumentation to ensure that all systems are
functioning correctly.
6. Carefully inspect the engine for fuel, oil, fluid, water and exhaust leaks.
7. Inspect the steering system, shift and throttle control for proper operation.

Seacock

The ABYC and other industry standards/regulations require the use of a seacock on certain
types of applications to stop the entry of water in the event of a leak in the cooling system.
Refer to applicable standards/regulations for specific requirements. The seacock also
allows the water to be shut off when servicing the engine.
Seacock must provide minimum restriction to wter flow (refer to Specifications). A ball or
gate valve is recommended. The ball valve is most common and is typically equipped with
a lever type handle that operates in a 90 degree arc. This design gives a clear indication
of whether the valve is open or shut. Industry standards/requirements typically require that
the seacock be rigidly attached to the hull at the water pickup. Seacock location should be
readily accessible for quick, easy operation.
90-860174050 JUNE 2005
CAUTION
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