Mercury 25 Jet FourStroke Operation, Maintenance And Installation Manual page 19

Engine exhaust gases contain harmful carbon monoxide. Avoid areas of
concentrated engine exhaust gases. When engines are running, keep
swimmers away from the boat, and do not sit, lie, or stand on swim platforms or
boarding ladders. While underway, do not allow passengers to be positioned
immediately behind the boat (platform dragging, teak/body surfing). This
dangerous practice not only places a person in an area of high engine exhaust
concentration, but also subjects them to the possibility of injury from the boat
propeller.
GOOD VENTILATION
Ventilate the passenger area, open side curtains or forward hatches to remove
fumes.
Example of desired air flow through the boat:
POOR VENTILATION
Under certain running and/or wind conditions, permanently enclosed or canvas
enclosed cabins or cockpits with insufficient ventilation may draw in carbon
monoxide. Install one or more carbon monoxide detectors in your boat.
Although the occurrence is rare, on a very calm day, swimmers and
passengers in an open area of a stationary boat that contains, or is near, a
running engine may be exposed to a hazardous level of carbon monoxide.
1. Examples of poor ventilation while the boat is stationary:
a
a - Operating the engine when the boat is moored in a confined space
b - Mooring close to another boat that has its engine operating
eng
GENERAL INFORMATION
b
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