Coolant Hoses
Before each trip, the coolant system should be checked for leaks. After
locating the pump housing, check the hose feeds for leaks, particularly
around the hose clamps. Inspect the hoses for signs of melting or
cracks, and replace as necessary.
!
WARNING
AVOID OPENING THE FILLER CAP FOR THE COOLANT SYSTEM
OR DISCONNECTING THE COOLANT SYSTEM HOSES WHILE THE
ENGINE IS STILL ON / HOT. UPON LOSS OF SYSTEM PRESSURE,
STEAM OR HOT COOLANT CAN SPRAY OUT OF THE SYSTEM
CAUSING BURNS.
Thermostat
If the temperature gauge starts yielding abnormal readings, it may
become necessary to look at or replace the engine thermostat after
determining whether it is functioning properly. The thermostat reads
the temperature of coolant and determines whether to open or close
a valve to allow warm sea water to pass into the exhaust manifold.
The thermostat may recirculate hot coolant for the purposes of
reaching standard operating temperatures. If standard operating
temperatures have been reached, the thermostat will open a valve
and allow hot raw water to exit through the exhaust manifold. To
inspect the thermostat, locate the thermostat housing, remove the
housing, thermostat, o-ring, and gasket. Inspect these components
for damage, and replace as necessary. Clean the intake manifold and
thermostat housing at the location of the gasket to ensure a tight fi t
before replacing components.
3-5
Engine & Controls
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