Why must you operate the exhaust blower before starting a boats onboard gasoline engine?

Operating the exhaust blower before starting a boat's onboard gasoline engine is crucial for safety. It helps to disperse any accumulated fuel vapors in the engine compartment, reducing the risk of ignition and potential explosions. This precaution ensures that the area is ventilated and minimizes the chances of fire hazards when the engine is started. Always adhering to this practice promotes a safer boating experience.