Abstract: A watercraft includes a hull; a deck supported by the hull; a propulsion system supported by the hull and configured to propel the watercraft; an electric motor operatively connected to the propulsion system to drive the propulsion system; a battery electrically connected to the electric motor for powering the electric motor; and a heat exchanger supported by the hull, the heat exchanger having defined therein at least: a first cooling channel, and a second cooling channel, a first cooling circuit being defined in part through the first cooling channel, the first cooling circuit being in thermal communication with at least one of the battery and the electric motor, a second cooling circuit being defined in part through the second cooling channel, the second cooling circuit being in thermal communication with at least an other one of the battery and the electric motor.

Abstract: A watercraft including a hull; a deck; a propulsion system to propel the watercraft; an electric motor to drive the propulsion system; a battery; and at least one heat exchanger at least partially extending out of the hull such that at least a portion of the heat exchanger is in contact with the body of water, a first cooling circuit in thermal communication with the heat exchanger and at least one of the battery and the electric motor, the first cooling circuit being configured to circulate a heat exchange fluid therein, a second cooling circuit being in thermal communication with an other one of the at least one of the electric motor and the battery, the second cooling circuit being in fluid communication with the body of water during operation of the watercraft for circulating water from the body of water in the second cooling circuit during use.

Abstract: A watercraft includes a jet propulsion system having a venturi unit and an impeller. The impeller is rotatable in a forward direction for propelling water rearward out of the venturi unit, and a reverse direction for propelling water forward through the venturi unit. A bailer-siphon system of the watercraft includes a fluid conduit defined in part by a valve, the fluid conduit having a fluid inlet in the motor compartment and a fluid outlet at the venturi unit. The valve is operable between an open position in which the valve fluidly connects the fluid inlet to the fluid outlet, and a closed position in which the valve fluidly disconnects the fluid inlet from the fluid outlet. The valve is in the open position when the impeller rotates in the forward direction. The valve is in the closed position when the impeller rotates in the reverse direction.

Abstract: A jet propulsion system for a watercraft includes a duct defining an inlet, a venturi unit, an impeller housing disposed between the inlet and the venturi unit, and an impeller disposed within the impeller housing. The impeller is rotatable in a forward direction and a reverse direction. The venturi unit includes a venturi conduit and at least one door connected thereto. The venturi conduit has a peripheral wall defining at least one aperture. The at least one door is movable between a closed position when the impeller rotates in the forward direction, and an open position when the impeller rotates in the reverse direction. In the closed position, the at least one door closes the at least one aperture. In the open position, the at least one door opens the at least one aperture such that water flows into the venturi conduit via the at least one aperture.