Page 122 - REPOWER REFERENCE GUIDE (2020)

Cooling System

Transom mount pickup
b d a - Hose fitting
e b - Nut (4)
a c f c - Gasket
d - O‑ring (4)
e - Washer (4)
g f - Screw (4)
g - Plastic plug
h - Pickup
h i - Screen
j - Screw (2)

i

j 7558

Tube Ref No. Description Where Used Part No.
Loctite 567 PST Pipe
9 Hose fitting threads and plastic plug threads 92-809822
Sealant
RTV 587 Ultra Blue
116 Silicone Sealer Sealing surfaces and screw shaft 92-809825

Seacock
Industry standards and regulations require a seacock with certain applications to prevent water entry from a leak in the cooling
system. Refer to applicable standards and regulations for specific requirements. The seacock also allows the water to be shut
off when servicing the engine. A seacock is necessary to allow proper flushing of Bravo models with closed cooling and
simplifies flushing on all models equipped with remote or alternative water pickups.
The seacock must provide minimum restriction to water 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° 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 water pickup. The seacock location should be readily accessible for quick, easy operation.

7532
Typical seacock

Page 4E-10 © 2019 Mercury Marine 90-8M0149179 eng NOVEMBER 2018