In gasoline power boats when should the blower be operated?

In gasoline-powered boats, the blower should be operated before starting the engine and for a few minutes afterward to remove any potentially explosive vapors from the engine compartment. It's especially important to use the blower after fueling the boat and if the boat has been sitting for an extended period. Additionally, the blower should be used whenever the boat is in operation to ensure proper ventilation and safety. Regularly checking the blower's functionality is also crucial for safe boating practices.