Seacock - Mercury MerCruiser Product Applications Manual

Tube Ref No.
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Seacock

The ABYC and other industry standards and regulations require the use of a seacock on
certain types of applications to stop the entry of seawater in the event of a leak in the cooling
system. Refer to applicable standards and regulations for specific requirements. The
seacock also allows the seawater to be shut off when servicing the engine.
The seacock must provide minimum restriction to seawater flow (see Specifications). A
ball valve 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 and requirements
typically require that the seacock be rigidly attached to the hull at the seawater pickup.
Seacock location should be readily accessible for quick, easy operation.
90-863758060 AUGUST 2006
Description
Loctite 567 PST Pipe Sealant
9
Description
RTV 587 Ultra Blue Silicone
116
Sealer
Typical seacock
Where Used
Hose fitting threads and plastic
plug threads
Where Used
Sealing surfaces and screw
shaft
7532
Cooling System
Part No.
92-809822
Part No.
92-809825
Page 7A-7