MAINTENANCE SERVICE MANUAL NUMBER 22
Page 1B-30 90-860074--1 FEBRUARY 2002
Draining
NOTICE
For instructions on Draining Seawater Section refer to Cold Weather or Extended Storage
in this SECTION 1B.
IMPORTANT: Observe the following:
w Insert a wire into drain holes to ensure that foreign material is not obstructing
the drain holes.
w Ensure engine is as level as possible to promote complete draining of cooling
system.
w Closed cooled section must be kept filled year round with recommended
coolant. If engine will be exposed to freezing temperatures, make sure closed
cooled section is filled with an ethylene glycol anti-freeze and water solution
properly mixed to protect engine to lowest temperature to which it will be
exposed.
w Do NOT use Propylene Glycol anti-freeze in the closed cooled section of the
engine.
WARNING
Allow engine to cool before removing pressure cap. Sudden loss of pressure could
cause hot coolant to boil and discharge violently causing severe injury.
1. Allow engine to cool. After engine has cooled, turn cap 1/4 turn to allow any pressure
to escape slowly, then push down and turn cap all the way off of heat exchanger/coolant
tank.
NOTE: Drain coolant into a suitable container. Dispose of old coolant properly.
2. Drain coolant from intake/exhaust manifold by opening the drain valves.
71364
a
Typical
a-Intake/Exhaust Manifold Drain Valve
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