Sources on your boat include gasoline engines and generators, cooking ranges, space heaters and water heaters. Cold and poorly turned engines produce more carbon monoxide than warm, properly tuned engines. Carbon monoxide is colorless, odorless and tasteless , and mixes evenly with the air. It enters your blood stream through the lungs and displaces the oxygen your body needs. Prolonged exposure can lead to death.
Carbon monoxide can collect within a boat in a variety of ways.
Exhaust leaks, the leading cause of death by carbon monoxide, can allow carbon monoxide to migrate throughout the boat and into enclosed areas. Even properly vented exhaust can re-enter a boat if it's moored too close to a dock or another boat, or if the exhaust is pushed back by prevailing winds. Regular maintenance and proper operation of the boat are the best defenses against injury from carbon monoxide. Schedule regular engine and exhaust system maintenance inspections by experienced and trained mechanics. Be aware that dangerous concentrations of carbon monoxide can accumulate when a boat, generator or other fueled device is operated while the boat is at a dock, seawall or alongside another boat.