Scout Boats 420 LXF, Owner'S Manual

Page: 112 / 202

112
Ventilation System
created by a boat nearby whose exhaust fumes
are entering your boat. Boats also have a problem
due to the “station wagon effect” where engine
exhaust fumes are captured in the vacuum or low
pressure area, usually the cockpit and cabin, that
can be created by the forward speed of the boat.
Boats underway should close all aft facing hatches,
windows and doors. The forward facing windshield
vent should be open whenever possible to help
pressurize the helm area of the boat. No sleeping
in the cabin should be permitted while underway.
The canvas drop or aft curtain must be removed
and the side curtains should be opened or removed
to increase air flow and maintain proper ventila -
tion whenever the engines are running. Under
no circumstances should the engines be operat-
ing with side curtains closed and the aft or drop
curtain installed.
Extreme caution must be taken while at anchor
or in a slip when an auxiliary power generator
is operating. Wind still nights can easily allow
exhaust fumes, containing high concentrations of
CO, from the generator on your boat or from an
adjacent boat’s generator to enter the boat.
A carbon monoxide detector has been installed
in your cabin as standard equipment. While a
CO detector enhances your protection from CO
poisoning, it does not guarantee it will not occur.
Do not use the carbon monoxide detector as a
replacement for ordinary precautions or periodic
inspections of equipment. Never rely on alarm
systems to save your life, common sense is still
prudent and necessary. Remember, the operator
of the boat carries the ultimate responsibility to
make sure the boat is properly ventilated and the
passengers are not exposed to dangerous levels
of carbon monoxide. You should always be alert
to the symptoms and early warning signs of car-
bon monoxide poisoning. You also should read
the “Carbon Monoxide Monitoring System” in the
Safety Equipment chapter of this manual and
the owner’s manual supplied by the CO detector
manufacturer for operation instructions and ad-
ditional information regarding the hazards and
symptoms of carbon monoxide poisoning.
Back Drafting / Station Wagon
Effect - at cruising speed with
no forward ventilation
Back Drafting / Station Wagon
Effect - at cruising speed with
canvas closed
Slow Speed or Boat Stopped
w/ engines running - CO can
accumulate in cabin, cockpit &
bridge
Desired Air Flow Through the
Boat
Onboard Generator Exhaust -
exhaust accumulates because
of bulkhead.
Nearby Generator Exhaust -
wind carries exhaust to the
other boat
Typical Carbon Monoxide Detector & Alarm
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