Why must you operate the exhaust blower before starting s boats inboard gasoline engine?

Operating the exhaust blower before starting a boat's inboard gasoline engine is crucial for safety. It helps to remove any potentially explosive gases, such as gasoline vapors, that may have accumulated in the engine compartment. This precaution minimizes the risk of fire or explosion when the engine is started. Ensuring proper ventilation is a key step in maintaining a safe boating environment.