
Exhaust
System
~WARNINGi
Carbon
monoxide
gas
is deadly! Carbon monoxide
is
a dangerous gas that can cause un-
consciousness and
is
potentially lethal. Some of the symptoms or signs of carbon monoxide
inhalation or poisoning are listed below.
o Dizziness
o Vomiting
o
Intense Headache
o Muscular Twitching
o Weakness and Sleepiness
o Throbbing in Temples
The generator should have
ITS
own separate exhaust installed so that the entry of
sea
water into the engine's
exhaust manifold and cylinders
is
prevented while the engine
is
not running,
or
while the vessel
is
under
sail
or
power in which case the vessel may experience heeling, backing down from following seas,
or
any other
conditions.
Special attention
111J,!,Sl
be taken
to
make certain the exhaust system
is
secure, tight and free of
leaks.
The sea water supply through-hull sea cock fittings
111J,!,Sl
be
of
the flush-hull type. High-speed scoop types
or
weedless scoop types must
not
be used, as they tend
to
encourage siphoning.
When a water lift type exhaust system
is
used, the exhaust muffler should be mounted
as close
to
the engine as practical. The ex-
haust
discharge
should
always
drop
downward into the exhaust muffler. Loops
in
the exhaust hose between the water-injected
exhaust elbow and the water lift muffler
should be avoided, as these will trap and hold
water.
For
installations
where
the
exhaust
manifold/water-injected exhaust elbow
is
at
or
below the vessel's water line, provisions
~
be made
to
install a siphon-break
or
a
vent in the sea water supply hose to the
water-injected exhaust elbow. This stops the
flow
of
sea water that runs through the sea
water cooling system from filling the exhaust
and engine cylinders when the engine
is
shut
down. This sea water supply hose
~
be
looped above the water line and the
siphon-
break
or
vent
installed
in
the
high
point
of
the
loop above the water line. This siphon-break
or
vent111J,!,Sl
always be above the water line
during
all angles
of
vessel operation
to
prevent siphoning. The vent, when used,
~
have its vent hose or tube routed so it
can remain above the water line and empty
of water when the engine is shut down. This
allows air
to
enter through this vent
to
prevent siphoning.
15
um!
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