An electrically-propelled marine vehicle and method of making same, including providing a hull of the marine vehicle and mounting a submersible electric thruster to the hull. The thruster includes a stator assembly and a rotor assembly. The rotor assembly forms an internal cavity with a plurality of magnets arranged radially outwardly of the internal cavity. The stator assembly includes electrical windings that are disposed within the internal cavity of the rotor assembly. The thruster is configured to allow the internal cavity to be flooded with water when the thruster is submerged, and the electrical windings are covered by a protective barrier that prevents the flooded water from contacting the windings. The thruster of the marine vehicle is thus water cooled, and the electromotive forces provided by the windings generate sufficient thrust to propel the marine vehicle through the water.

An outboard motor includes a drive source including an electric motor, a coolant tube through which a coolant to cool the drive source flows, a water tube through which water from outside the outboard motor flows, and a heat exchanger including a coolant flow path through which the coolant from the coolant tube flows and a water flow path through which the water from the water tube flows. At least one of the coolant flow path and the water flow path includes a first flow path, a second flow path lower than the first flow path, and a first bent connector connecting one end of the first flow path and one end of the second flow path. The first flow path includes a first connecting hole connected to an outside of the heat exchanger, and an upper surface inclined upward at an angle toward the first connecting hole.

A ship propulsion machine includes: a first motor; a second motor, a first inverter configured; a second inverter; and a cooling mechanism. The cooling mechanism includes: a first motor water jacket; a second motor water jacket; a first inverter water jacket; and a second inverter water jacket. The first motor water jacket and the first inverter water jacket are connected in parallel with each other. The second motor water jacket is connected to a downstream side of the first motor water jacket, and the second inverter water jacket is connected to a downstream side of the first inverter water jacket.

A ship propulsion machine includes a motor, an inverter, a propeller, a power transmission mechanism, and a cooling mechanism. The cooling mechanism includes: a motor water jacket configured to cool the motor by allowing cooling water to flow therein; an inverter water jacket configured to cool the inverter by allowing the cooling water to flow therein; a first cooling water passage configured to allow the cooling water to flow toward the motor water jacket and the inverter water jacket; and a branch passage connecting the motor water jacket and the inverter water jacket to the first cooling water passage such that the motor water jacket and the inverter water jacket are connected in parallel with each other. The branch passage is configured to distribute and supply the cooling water flowing in the first cooling water passage to the motor water jacket and the inverter water jacket.

The present invention increases the design quality and a field of rear vision of a vessel. An electric outboard motor 70 comprises an outboard motor main body 60 and a mounting portion 50. The outboard motor main body 60 comprises a propeller 66, an electric motor 62 that drives the propeller 66, and a control unit 61 that controls the motor 62. The mounting portion 50 mounts the outboard motor main body 60 to the rear of a hull 10. The upper end of the motor 62 and the upper end of the control unit 61 are positioned below the upper end Z of the rear surface of a portion of the hull 10 to which the mounting portion 50 is mounted.

An outboard motor includes an upper case, a lower case, a transmission, a clutch, a cooling water passage, a first pump, and a second pump. The transmission is operable to transmit the driving force of the engine. The clutch is connected to the transmission. The cooling water passage is connected to the engine. The cooling water passage is located in the upper case and the lower case. The first pump is connected to the transmission via the clutch. The first pump is driven by the driving force of the engine to send cooling water to the engine through the cooling water passage. The second pump is connected to the transmission. The second pump is driven by the driving force of the engine to send the cooling water to the engine through the cooling water passage.

The present disclosure relates to an impeller driving device for a cooling pump of an electric outboard device, configured so that a gearbox housing is installed on an outboard-device body and an impeller housing is installed against an outer surface of a right side of the gearbox housing on the outboard-device body to drive the impeller for the cooling pump of the electric outboard device.

A cooling device for a ship propulsion machine includes a drain passage and a collector. The collector includes a collector main body, a case, an upper connection pipe, and a lower connection pipe having flexibility. A first bent portion is provided between an upper end portion and a lower end portion of the lower connection pipe. A second bent portion is provided between the first bent portion and the lower end portion of the lower connection pipe. The lower connection pipe extends downward from the upper end portion thereof along an axis of the case, bends at the first bent portion, extends downward while being inclined with respect to the axis so as to be separated from the axis, bends at the second bent portion, and extends downward while being inclined with respect to the axis so as to be close to the axis.

According to embodiments of the present disclosure, various methods, apparatuses, and computer program products for controlling a cooling system water intake pump of an electric marine vessel are described herein. In some aspects, a pump controller receives information describing an operating state of an electric propulsion device of a marine vessel, where the information indicates at least one of a motor speed of an electric motor and temperature readings within the electric propulsion system. The pump controller controls a water intake pump of a cooling system for the electric propulsion device based on the received information.

A marine drive includes a cooling system configured to circulate a cooling fluid to cool a component of the marine drive or a marine vessel, the cooling system includes a first flow path along which the cooling fluid is supplied to the component and a second flow path along which the cooling fluid is returned from the component. A valve is operable to block the first flow path and the second flow path to thereby prevent the circulation of the cooling fluid along the first flow path and the second flow path.