Operator`s manual
2 inches
of
mercury
27 inches
of
water in a water column
15.6 ounces
PSI
1.0
PSI
NOTE: Other pressure gauges may be available
to
test
for
exhaust back-pressure.
Oil Drain
An oil sump drain hose is installed on the engine with the discharge end secured
by
a bracket at the front of
the engine. Oil may be drained from this hose
by
removing the
cap
and the discharge end
of
the hose from
the support bracket and lowering the hose into a container. The hose cap fitting is 1/4 inch-NPT (National
Pipe Tap) and can be extended,
or
have a pump added,
for
easier removal
of
the old oil, if desired.
Cooling
System
The generator's engine is fresh water cooled
by
an engine-mounted heat exchanger. Sea water is used as
the heat exchange's cooling medium. Sea water is pumped into the exchanger
by
a sea water pump and is
then injected into the exhaust discharge, carrying with it the heat removed from the engine's fresh water cool-
ing system.
Sea water should be supplied
to
the sea water pump through a flush-type hull fitting using a wire-reinforced
hose between the thru-hull fitting and the sea water pump. This sea water should be directed through a
visual-type sea water strainer and then delivered
to
the pump. Hoses routed from the thru-hull fitting
to
the
strainer and
to
the sea water pump should be wire-reinforced
to
prevent the hose from collapsing during the
generator's operation (suction from the pump may collapse a non-reinforced hose).
Sea water strainers
should be mounted at
or
below the water line
to
make sure the sea water line remains primed.
CAUTION
Do
not
use a scoop-type thru-hull fitting as a means
of
supplying sea water
to
the generator.
Water pressure against this type fitting, while the vessel is under way, can push sea water past
the sea water pump's impeller into the generator's exhaust system, filling it and the engine as
well. Flush-type, clear, thru-hull fittings are recommended and should be located on the hull
so as
to
be below the waterline during all angles
of
boat operation.
The use
of
common-type street elbows is not recommended
for
plumbing the sea water cir-
cuit. These generally have very restrictive inside diameters. Machined fittings are preferred.
Automatic
Shutdown
High Exhaust Temperature Shutdown Switch (normally closed)
An exhaust temperature switch is located on the exhaust elbow. This switch will open and shut the fuel
solenoid OFF (which turns OFF the engine) should the switch's sensor indicate an excessive exhaust
temperature (an inadequate supply
of
sea water coolant causes high exhaust temperatures). This switch
opens at 260 - 270
0
F (127
-132
0
C). This switch resets at approximately 225
0
F (10]0 C).
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