Abstract: A fuel supply system for supplying a low boiling point fuel to an internal combustion engine of a vehicle includes a fuel tank that encloses a tank volume and includes a primary chamber within the tank volume, a head chamber within the tank volume, and a divider wall. The head chamber is configured to contain fuel up to a head height. The divider wall is attached to a wall of the fuel tank and separates the primary chamber and the head chamber. A fluid pathway guides fuel from along a floor of the tank in the primary chamber through the divider wall and into the head chamber at or above the head height, responsive to movement of the fuel in the primary chamber. An output port is located in a wall of the head chamber adjacent the floor.