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.

A control system for a trolling motor operated based upon commands generated by a wireless remote control device and a wired foot pedal is provided. The controller is interposed between the trolling motor and the wired foot pedal to add wireless controllability to the trolling motor via the wireless remote control. The controller communicates with the remote control through a bidirectional wireless communication link to receive commands and to provide status information on the operation of the motor. The remote control includes user inputs for generating commands that are sent wirelessly to the controller to control operation of the marine device. The remote control also includes a display for displaying real time status information that is received wirelessly from the controller. The controller generates control signals upon receipt of wireless communication from the remote control that simulate signals that are normally generated by the wired foot pedal.

A personal watercraft comprises a deck having coupled thereto a hull defining a bottom wall, a rear wall and a water intake extending from the bottom wall to the rear wall, and a jet propulsion system. The jet propulsion system comprises a housing coupled to the rear wall and defining an inlet to receive water from the water intake, a venturi, and an outlet to expel the water, and comprises a rim-driven motor disposed within the housing between the inlet and the venturi. The rim-driven motor defines a center axis and comprises a stator coupled to the housing, a rotor disposed radially inwardly of the stator relative to the center axis, and impeller blades coupled to the rotor and projecting towards the center axis, the rotor and the impeller blades rotatable about the center axis to draw the water via the inlet and expel the water via the outlet.