™
378
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
structures.
J.
The Effect of Boats Moored Along Side
A boat operator should be aware that carbon monoxide
is emitted from any boat’s exhaust. The operation,
mooring, 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 con-
centration on your boat. See Figure B8.
Figure B9: Backdrafting - Air flows over boat and
behind transom.
1.
Intentional or unintentional excessive trim angle
causing high bow angle. See Figure B10.
2.
Excessive or unequally distributed weight.
Figure B8: The effect of boats moored along side.
Figure B10: Inefficient trim angles.
K. Backdrafting (Station Wagon Effect)
3.
Canvas Configurations - Under various conditions,
adding or removing canvas may raise or lower CO
levels. See Figures B9, B10 & B12.
Backdrafting or the “station wagon effect” is caused by
air movement over or around a boat creating a low pres-
sure area or suction area around the stern that can in-
crease CO level on the boat. Backdrafting can be af-
fected by relative wind direction , boat speed, and boat
trim angle. See Figure B9 Backdrafting -Airflows Over
Boat and Behind Transom”.
Exhaust Fumes!
Hull exhaust from your boat can cause exces-
sive accumulation of poisonous carbon monox-
ide gas within cockpit areas when using protec-
tive weather coverings (while underway or while
stationary). Provide adequate ventilation when
the canvas top, side curtains and/or back (aft)
curtains are in their closed protective positions.
Under certain speed and operating conditions the low
pressure area may form in other regions and permit
carbon monoxide to enter the hull through openings that
are not on the back of the boat. Boat factors which
may affect CO concentration:
4.
Opening and closing ports, hatches, doors, and win-
dows may raise or lower CO levels on board a boat.
When airflow is moving forward inside the boat, CO
may be entering the boat. See Figures B11 and B12.
378
Vista™ Owner’s Manual
Section B
Page 7
| Categories | Four Winns Manuals, Four Winns Vista Manuals, Outboard Marine Corporation Manuals |
|---|---|
| Tags | Four Winns Vista 378 |
| Model Year | 2005 |
| Download File |
|
| Document Type | Owner's Manual |
| Language | English |
| Product Brand | Boats and Cruisers, Four Winns. For support contact your dealer at http://www.fourwinns.com/locate-dealer.aspx |
| Document File Type | |
| Publisher | fourwinns.com |
| Wikipedia's Page | Outboard Marine Corporation |
| Copyright | Attribution Non-commercial |
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