A fluid moving apparatus includes an electric motor having a rotor and a stator and a propeller. The rotor rotates relative to the stator on an axis to generate a rotational output. The rotational output is provided to the propeller to power the marine propulsion apparatus. The stator includes one or more coils configured to power rotation of the rotor. The one or more coils extend circumferentially around and can be coaxial on the axis. A portion of a housing of the motor extends into the aquatic environment to facilitate heat dissipation.

A fluid moving apparatus includes an electric motor having a rotor and a stator and a propeller. The rotor rotates relative to the stator on an axis to generate a rotational output. The rotational output is provided to the propeller to power the marine propulsion apparatus. The stator includes one or more coils configured to power rotation of the rotor. The one or more coils extend circumferentially around and can be coaxial on the axis. A portion of a housing of the motor extends into the aquatic environment to facilitate heat dissipation.

An outboard motor includes a steering mechanism including a pinion located in a central portion of an outboard motor body in a right-left direction and operable to rotate together with the outboard motor body, a rack operable to linearly move to rotate the pinion, and a rack position detector on a first side of the rack opposite to the pinion to detect a position of the rack.

An outboard motor includes a steering mechanism including a pinion located in a central portion of an outboard motor body in a right-left direction and operable to rotate together with the outboard motor body, a rack operable to linearly move to rotate the pinion, and a rack position detector on a first side of the rack opposite to the pinion to detect a position of the rack.

A marine propulsion system includes marine propulsion devices each including a propeller shaft, an engine, an electric motor, a power transmission, an inverter, a voltage sensor, and a controller. The power transmission transmits mechanical power to the propeller shaft from at least one of the engine and the electric motor. The inverter outputs electric power inputted thereto to the electric motor after converting the electric power. The voltage sensor detects induced voltage generated by the electric motor. The controller executes a protection control to protect the inverter when the induced voltage is greater than a first threshold while the electric motor is not being driven.

A marine propulsion system includes marine propulsion devices each including a propeller shaft, an engine, an electric motor, a power transmission, an inverter, a voltage sensor, and a controller. The power transmission transmits mechanical power to the propeller shaft from at least one of the engine and the electric motor. The inverter outputs electric power inputted thereto to the electric motor after converting the electric power. The voltage sensor detects induced voltage generated by the electric motor. The controller executes a protection control to protect the inverter when the induced voltage is greater than a first threshold while the electric motor is not being driven.

The invention relates to a propeller arrangement (1) having a propeller part (2) and a shaft part (3), in particular for an underwater vacuum cleaner, wherein the propeller part (2) and the shaft part (3) are coaxially connected to one another via a latching connection (4), which latching connection (4) has at least two latching fingers (5) which can move elastically in a latching direction (R) radially with respect to an axis of rotation (1a) of the propeller arrangement (1), and a latching opening (6) for accommodating the latching fingers (5). The latching fingers (5) are formed integrally with the shaft part (3). The latching fingers (5) and the latching opening (6) form—in and/or against a direction of rotation (P) of the propeller arrangement (1) —a positive connection. This enables an easily detachable rotary connection between the propeller part (2) and the shaft part (3) in a simple manner.

The invention relates to a propeller arrangement (1) having a propeller part (2) and a shaft part (3), in particular for an underwater vacuum cleaner, wherein the propeller part (2) and the shaft part (3) are coaxially connected to one another via a latching connection (4), which latching connection (4) has at least two latching fingers (5) which can move elastically in a latching direction (R) radially with respect to an axis of rotation (1a) of the propeller arrangement (1), and a latching opening (6) for accommodating the latching fingers (5). The latching fingers (5) are formed integrally with the shaft part (3). The latching fingers (5) and the latching opening (6) form—in and/or against a direction of rotation (P) of the propeller arrangement (1) —a positive connection. This enables an easily detachable rotary connection between the propeller part (2) and the shaft part (3) in a simple manner.

A marine propulsion system, comprising a drive shaft secured to a propeller to rotationally drive the propeller; a motor selectively coupled to the drive shaft to rotate the drive shaft; an electrical energy storage unit coupled to the motor to supply an on-board electrical power supply to the motor, the electrical energy storage unit configured to be recharged by an on-shore electrical power supply; an engine selectively coupled to the drive shaft to rotate the drive shall, the engine not coupled to the electrical energy storage unit for use as a generator to recharge the electrical energy storage unit; and a control system coupled to the motor and to the engine for selecting one of the motor and the engine to rotate the drive shaft. A hybrid marine propulsion method, comprising rotationally driving a drive shaft and propeller using an engine; shifting the engine into neutral; turning on an electric motor by manually activating a motor toggle; disengaging the engine from rotational driving engagement with the drive shaft and engaging the electric motor in rotational driving engagement with the drive shaft; and turning on a fluid sub-system to supply fluid to the drive shaft by manually activating a fluid sub-system toggle.

A marine propulsion system, comprising a drive shaft secured to a propeller to rotationally drive the propeller; a motor selectively coupled to the drive shaft to rotate the drive shaft; an electrical energy storage unit coupled to the motor to supply an on-board electrical power supply to the motor, the electrical energy storage unit configured to be recharged by an on-shore electrical power supply; an engine selectively coupled to the drive shaft to rotate the drive shall, the engine not coupled to the electrical energy storage unit for use as a generator to recharge the electrical energy storage unit; and a control system coupled to the motor and to the engine for selecting one of the motor and the engine to rotate the drive shaft. A hybrid marine propulsion method, comprising rotationally driving a drive shaft and propeller using an engine; shifting the engine into neutral; turning on an electric motor by manually activating a motor toggle; disengaging the engine from rotational driving engagement with the drive shaft and engaging the electric motor in rotational driving engagement with the drive shaft; and turning on a fluid sub-system to supply fluid to the drive shaft by manually activating a fluid sub-system toggle.