How many minutes should a blower be operated before starting an engine?

Operating a blower before starting an engine is essential for safety, especially in confined spaces like a boat's engine compartment. The purpose of using a blower is to ventilate the area by removing any potentially harmful gases, vapors, or excess fuel that may have accumulated. This helps to avoid the risk of an explosion or fire caused by igniting flammable substances.

The most widely recommended time for operating the blower is four minutes. This duration allows sufficient time for proper ventilation, ensuring that any dangerous vapors are significantly reduced before the engine is started. It’s crucial for boaters to adhere to this guideline to maintain safety standards while operating their vessels.

By following the four-minute rule, boaters can ensure that the environment is clear of hazards, thereby reducing the likelihood of incidents associated with flammable vapors when starting the engine.