When should a blower be operated in a boat?

A blower should be operated in a boat before starting the engine and periodically while the engine is running, especially if the boat has an enclosed engine compartment. This helps to ventilate any potentially hazardous fumes or gases, such as gasoline vapors, which can accumulate and pose a risk of explosion. Additionally, it's good practice to run the blower for a few minutes after refueling to ensure that any residual vapors are cleared. Always check the manufacturer's guidelines for specific recommendations related to your boat.