D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS
Page 83 of 90
3. Repeatedly clean out drain holes using a stiff piece of wire. Do this until entire system
is drained.
4. Remove seawater pump outlet hose from top of seawater pump and drain.
76107
b
a
a-Seawater Pump
b-Outlet Hose
CAUTION
Avoid water entering boat. Do not unplug or disconnect seawater inlet hose unless
a seacock is present and it is closed.
5. Remove hose(s) at seawater strainer and drain hose(s) completely. Remove drain plug
and empty seawater strainer. Reconnect hoses. Tighten hose clamps securely. Install
drain plug. Tighten securely.
71362
a
b
c
c
a-Seawater Strainer
b-Drain Plug
c-Hose
6. After seawater section of cooling system has been drained completely, coat threads of
drain plugs with Perfect Seal and reinstall. Tighten securely. Connect hose to seawater
pump outlet (top). Tighten hose clamps securely. Replace end cover gaskets and seals,
if worn or deteriorated. Install end cover assemblies on the heat exchanger. Torque the
end covers to 120-132 lb-in. (14-15 Nm).
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