Service manual

CLOSED COOLED MODELS
SERVICE MANUAL NUMBER 26
90-861329--1 MARCH 1999 Page 6B-19
Draining Seawater Section of Closed Cooling System
NOTICE
For “Cold Weather Or Extended Storage” information and procedures, refer to
SECTION 1B.
NOTE: It may be necessary to lift, bend, or lower hoses to allow water to drain completely
when hoses are disconnected.
CAUTION
If boat is in the water or is to remain in the water, seacock (if so equipped) must
remain closed until engine is to be restarted, to prevent contaminated water from
flowing back into cooling system. If boat is not fitted with a seacock, water inlet
hose must be left disconnected and plugged, to prevent contaminated water from
flowing into cooling system and/or boat. As a precautionary measure, attach a tag
to the ignition switch or steering wheel with the warning that the seacock must be
opened or the water inlet hose reconnected prior to starting the engine.
1. Close seacock (if so equipped) or disconnect and plug seawater inlet hose.
2. Check that engine is as level as possible to ensure complete draining of cooling system.
3. Remove drain plugs from exhaust manifold.
71424
a
a-Drain Plug (Port and Starboard)
4. Remove aft (rear) drain plug from heat exchanger.
71423
a
a-Drain Plug
5. Repeatedly clean out drain holes using a stiff piece of wire. Do this until entire system
is drained.
NOTE: It may be necessary to lift, bend, or lower hoses to allow water to drain completely
when hoses are disconnected.
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