MAINTENANCE
SERVICE MANUAL NUMBER 25
90-861328--1 NOVEMBER 1999
Page 1B-37
3. Remove seawater pump inlet hose.
75533
a
b
a -
Seawater Inlet Hose
b -
Hose To Cooler
4. Remove end caps, sealing washers and gaskets from the heat exchanger. Allow tubes
to drain.
71515
b
c
d
a
a -
Heat Exchanger
b -
Sealing Washer
c -
End Cap
d -
Gasket
IMPORTANT: Use compressed air to blow any remaining water from the tubes in the
heat exchanger.
5. Repeatedly clean out drain holes using a stiff piece of wire. Do this until entire system
is drained.
6. After seawater section of cooling system has been drained completely:
a. Install all drain plugs and tighten securely.
b. Reconnect hoses and tighten all hose clamps securely.
c. Apply Quicksilver Perfect Seal to both sides of new end plate gaskets.
d. Assemble new gaskets, new sealing washers and end plates onto heat exchanger.
Torque end plate screws to 36-72 lb-in. (4-8 Nm).
e. If NOT equipped with seacock: Seawater inlet hose must remain disconnected
and plugged until engine is to be restarted.
