Mercury 60 Operation, Maintenance & Installation Manual page 22

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
2. Examples of poor ventilation while the boat is moving:
a
a - Operating the boat with the trim angle of the bow too high
b - Operating the boat with no forward hatches open (station wagon effect)
GENERAL INFORMATION
b
12
21622
21626
b
21628
eng