What is the best to take when fueling an outboard boat with a portable tank?

When fueling an outboard boat with a portable tank, it's essential to use fuel specifically designed for marine engines, typically unleaded gasoline with a suitable octane rating. Always ensure the area is well-ventilated, and avoid overfilling the tank to prevent spills. It's also advisable to use a fuel stabilizer if the fuel will be stored for an extended period. Lastly, check all connections for leaks and ensure the vent on the tank is open to allow for proper airflow.