Boathouses, Sea Walls and Confined Spaces
Prompt action can make the difference between
life and death.
A boat operator should be aware that dangerous con-
centrations of CO can accumulate when a boat, genera-
tor or other engine operated device is operated while the
boat is moored in a confined area such as:
Investigate source of CO and take corrective ac-
Proximity to sea walls, or
Proximity to other boats.
Look and listen for leaks in the exhaust systems of both
the generator and propulsion engine(s). Look for discol-
oration around joints in the system (water leaks, carbon,
Keep engine room hatches and doors closed when op-
erating engines, including the generator.
Make sure all exhaust clamps are in place and se-
Pay attention to prevailing conditions and provide for
ventilation to induce fresh air and minimize exhaust re-
entry. Orient the boat for maximum dissipation of the
exhaust. DO NOT run the boat or boat equipment for
extended periods under these conditions. See Figure
Make sure ventilation systems work and are not ob-
structed or restricted.
Make sure gaps around the engine room plumbing
and cableways and exhaust system doors, hatches,
and access panels are minimized to reduce the op-
portunity for CO to enter the accommodation
ColdStart vs. Warm Start: CO productionisgreaterwhile
the combustion chamber surfaces and gas passages
are cold versus when they are warm. A boat operator
Figure B6: The effect of sea walls and other confined spaces.
Pay attention to ventilating the boat.
Be aware that cockpit and deck drains can be a source
of CO ingress into boats, especially boats with cockpit
or decks enclosed with canvas or permanent boat struc-
Orient the boat so it will allow the maximum dissipa-
tion of CO.
Minimize the time spent on getting underway.
J. The Effect of Boats Moored Along Side
In order to minimize CO buildup, do not warm up
or run propulsion engine(s) for extended periods
while the vessel is stationary.
A boat operator should be aware that carbon monoxide
is emitted from any boat’s exhaust. The operation, moor-
ing, and anchoring in an area containing other boats may
be in an atmosphere containing CO not of the operator’s
making. An operator likewise needs to be aware of the
effect of their boat on other boats in the area. Of prime
concern is the operation of an auxiliary generator where
boats are moored along side each other. Be aware of
the effect your exhaust may have on other boats and be
aware that the operation of other boats’ equipment may
affect the carbon monoxide concentration on your boat.
See Figure B7.
The following are examples of possible situa-
tions where carbon monoxide can accumulate
within your boat while docked, anchored, or un-
derway. Become familiar with these examples
and their precautions to prevent dangerous
accidents or death.
Sundowner™ Owner’s Manual
|Categories||Four Winns Manuals, Four Winns Sundowner Manuals, Outboard Marine Corporation Manuals|
|Tags||Four Winns Sundowner 205, Four Winns Sundowner 225, Four Winns Sundowner 245, Four Winns Sundowner 285|
|Model Year||2003, 2004, 2005, 2006, 2007, 2008|
|Document Type||Owner's Manual|
|Product Brand||Boats and Cruisers, Four Winns. For support contact your dealer at http://www.fourwinns.com/locate-dealer.aspx|
|Document File Type|
|Wikipedia's Page||Outboard Marine Corporation|
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