The present disclosure relates to an outboard for a watercraft. The outboard has a body comprising a motor housing portion for housing an electric motor and a controller, and a closed cooling loop for cooling fluid to cool the electric motor and the controller when 5 housed in the motor housing portion. The outboard is configured such that a portion of the cooling loop is submerged when the outboard is in use.

An outboard-motor vibration-isolating cooler system apparatus providing a retrofit substitute for the midsection and the lower unit of a standard outboard motor, having a substitute closed-loop cooling system with an exterior heat exchanger, a substitute oil reservoir, a substitute exhaust system, and a substitute propulsion system with an isolating power-take-off shaft, allowing an existing standard outboard-motor powerhead to be used in conditions not conducive to standard open-loop water cooling, such as shallow-water, muddy-water, obstructed-water, seawater, or corrosive-water conditions.

An outboard motor for a marine vessel application, and related methods of making and operating same, are disclosed herein. In at least one embodiment, the outboard motor includes a horizontal-crankshaft engine in an upper portion of the outboard motor, positioned substantially positioned above a trimming axis of the outboard motor. In at least another embodiment, first, second and third transmission devices are employed to transmit rotational power from the engine to one or more propellers at a lower portion of the outboard motor. In at least a further embodiment, the outboard motor is made to include a rigid interior assembly formed by the engine, multiple transmission devices, and a further structural component. In further embodiments, the outboard motor includes numerous cooling, exhaust, and/or oil system components, as well as other transmission features.

An outboard motor for a marine vessel application, and related methods of making and operating same, are disclosed herein. In at least one embodiment, the outboard motor includes a horizontal-crankshaft engine in an upper portion of the outboard motor, positioned substantially positioned above a trimming axis of the outboard motor. In at least another embodiment, first, second and third transmission devices are employed to transmit rotational power from the engine to one or more propellers at a lower portion of the outboard motor. In at least a further embodiment, the outboard motor is made to include a rigid interior assembly formed by the engine, multiple transmission devices, and a further structural component. In further embodiments, the outboard motor includes numerous cooling, exhaust, and/or oil system components, as well as other transmission features.

An outboard motor for a marine vessel application, and related methods of making and operating same, are disclosed herein. In at least one embodiment, the outboard motor includes a horizontal-crankshaft engine in an upper portion of the outboard motor, positioned substantially positioned above a trimming axis of the outboard motor. In at least another embodiment, first, second and third transmission devices are employed to transmit rotational power from the engine to one or more propellers at a lower portion of the outboard motor. In at least a further embodiment, the outboard motor is made to include a rigid interior assembly formed by the engine, multiple transmission devices, and a further structural component. In further embodiments, the outboard motor includes numerous cooling, exhaust, and/or oil system components, as well as other transmission features.

A marine propulsion device includes an engine, an exhaust pipe to allow exhaust gas of the engine to pass through the exhaust pipe, and a cooling water supply passage to supply cooling water for the engine into the exhaust pipe toward a downstream side in a flow direction of the exhaust gas and cause the cooling water to flow circumferentially along an inner peripheral surface of the exhaust pipe.

An outboard motor for propelling a ship, includes: a propeller unit including a propeller shaft, a propeller fixed to the propeller shaft, and a case for rotatably supporting the propeller shaft; a support portion formed in a columnar shape extending in an upper-lower direction and having a lower end portion to which the propeller unit is supported; a bracket provided at an upper portion of the support portion and configured to attach the support portion to the ship; and a fine dust capturing device having a passage through which water around the outboard motor flows and configured to capture fine dust contained in the water flowing through the passage. The fine dust capturing device is provided between the lower end portion of the support portion and the case such that an extension direction of the passage is a front-rear direction of the outboard motor.

A fine dust capturing device provided in a ship propulsion device, is disposed in water, and configured to capture fine dust contained in the water. The fine dust capturing device includes: a body portion extending in one direction; a water intake; a wall portion; a first passage and a second passage; a water discharge chamber; an outlet; and a filter. One end side of each of the first passage and the second passage is connected to the water intake. Another end side of each of the first passage and the second passage opens in the water discharge chamber. The outlet is disposed in the wall portion at a position that does not face an opening of the first passage opening in the water discharge chamber, but faces an opening of the second passage opening in the water discharge chamber.

An outboard-motor closed-loop cooler system apparatus providing a retrofit substitute for the midsection and the lower unit of a standard outboard motor, having a substitute closed-loop cooling system with an exterior heat exchanger, a substitute oil reservoir, a substitute exhaust system, and a substitute propulsion system, allowing an existing standard outboard-motor powerhead to be used in conditions not conducive to standard open-loop water cooling, such as shallow-water, muddy-water, obstructed-water, seawater, or corrosive-water conditions.

An axial flux propulsion system for an electric boat that includes interconnecting subsystems including a mounting system, a traction system, a transmission system, an electrical power distribution system, a control system, and a fluid management system, among other boat systems. The traction system typically is an axial flux motor/generator. Various embodiment of the axial flux propulsion system may include a stern drive embodiment and a jet drive embodiment. Portions of the axial flux propulsion system may be both inboard and outboard. A control system may control the operation of the various boat systems including the axial flux motor/generator, and as a result, control the overall operation of the boat.