What actions is the best to take when fueling an outboad boat with aportable tank?

When fueling an outboard boat with a portable tank, first ensure the boat is on land or securely docked to prevent any movement. Turn off the engine and any electrical devices, and remove any sources of ignition. Use a funnel to prevent spills and avoid overfilling the tank, ensuring to leave some space for expansion. Lastly, check for leaks after fueling and securely fasten the cap before starting the engine.