MAINTENANCE SERVICE MANUAL NUMBER 22
Page 1B-68 90-860074--1 FEBRUARY 2002
4. Remove the end covers from BOTH port and starboard ends on upper and lower
sections of heat exchanger tank.
5. Drain tank completely.
6. Sponge out or soak up any water that remains in the bottom part of upper and lower heat
exchanger sections, until all water passage tubes are completely free of standing water.
CAUTION
Avoid damage to heat exchanger and subsequent possible engine damage.
Remove all water from heat exchanger sections. Failure to do so could cause
corrosion or freeze damage to heat exchanger water passage tubes.
73322
73326
a
b
a
b
a-Upper Section End Cover
b-Lower Section End Cover
NOTE: In the following it may be necessary to lower or bend the hoses to allow water to drain
completely.
7. On Sterndrive (MCM) Engines: Disconnect seawater outlet hose at aft end of power
steering fluid cooler. Lower hose and drain completely.
75297
a
b
Typical
a-Power Steering Fluid Cooler
b-Seawater Hose
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