Removing Fumes and Gas Vapors: Before starting the engine, the exhaust blower helps clear accumulated fumes, fuel vapors, and any unburned hydrocarbons that may have gathered in the bilge or engine compartment. These vapors can be flammable and, if ignited, could cause an explosion or fire.
Preventing Carbon Monoxide Buildup: Carbon monoxide is a colorless, odorless, and highly toxic gas produced by the incomplete combustion of gasoline. Inhaling CO can lead to serious health effects, including headaches, dizziness, nausea, loss of consciousness, and even death in severe cases. Running the exhaust blower helps ventilate the engine compartment and removes CO before it can accumulate to dangerous levels.
Ensuring Adequate Airflow: An inboard gasoline engine requires a sufficient air supply for proper combustion. Operating the exhaust blower creates airflow through the engine compartment, bringing in fresh air and aiding in the proper burning of fuel. Good airflow also helps cool the engine and its components.
Safety Regulations: In many jurisdictions, running the exhaust blower before starting a boat's engine is a legal requirement. It is considered a critical safety practice and contributes to the overall safety of passengers and crew members onboard.
To effectively remove fumes and prevent CO buildup, the exhaust blower should be turned on at least 3-5 minutes prior to starting the engine and allowed to run during engine operation and for a few minutes after it is turned off. This proactive measure will ensure proper ventilation and a safe environment on your boat.
