Mercury MerCruiser D2.8L D-Tronic Service Manual page 753

SERVICE MANUAL NUMBER 22
Installation
NOTE: Always install the thermostats before the gasket. Regardless of position, ensure that
1 thermostat is a 70 degrees C (160 degrees F) thermostat and 1 is an 82 degrees C (180
degrees F) thermostat.
1. Install thermostats.
NOTE: Always use a new thermostat housing gasket.
2. Apply Perfect Seal to both sides of the new thermostat housing gasket.
3. Install the new gasket.
4. Install thermostat housing cover.
5. Torque the housing cover screws and nut evenly to 16 Nm (132 lb-in.), in a diagonal
pattern.
6. Connect hoses.
7. Fill the closed cooling system.
8. Open seacock if equipped, or unplug and reconnect seawater inlet hose.
9. Start and operate the engine.
10. Check for leaks.
11. Check for normal engine operating temperatures.
90-860074-1 FEBRUARY 2002
e
a
A
c
a - Housing Cover
b - Thermostat (2 Different Temperatures)
c - Gasket
d - Screw With Washer (5)
e - Engine Cover Mount Threaded Spacer/ Nut (1)
d
b
b
CLOSED COOLING SYSTEM
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