A marine propulsion device includes a drive shaft, a propeller shaft, and a lower case that houses the propeller shaft. In the marine propulsion device, a power generator generates power using a torque of the drive shaft or the propeller shaft, and the generated power is supplied to an electric actuator to drive a driven unit through a first power line, wherein the electric actuator is controlled by a controller. At least a portion of the driven unit, at least a portion of the electric actuator, at least a portion of the power generator, and the first power line are located in the lower case.

An engine includes an engine stop switch for stopping the engine, and a cooling part included in a holding portion or passage of a cooling liquid. The engine stop switch is placed at the cooling part or at a peripheral part of the cooling part.

An engine includes an engine stop switch for stopping the engine, and a cooling part included in a holding portion or passage of a cooling liquid. The engine stop switch is placed at the cooling part or at a peripheral part of the cooling part.

Disclosed is a passively cooled waterproof propulsion unit for a watercraft is provided comprising a substantially cylindrical housing including an outer wall having an external surface and an internal surface. The cylindrical housing includes a first end cap attached at a first end of the housing. The first end cap includes an attachment interface configured to be mounted to a strut of a watercraft such that at least a portion of the external surface of the outer wall of the housing is configured to contact a fluid surrounding the housing when the watercraft operates within the fluid. The propulsion unit further includes an electric motor disposed with in the housing and an electronic speed controller. The electronic speed controller is electrically coupled to the electric motor and configured to provide electrical power to the electric motor to operate the electric motor.

Disclosed is a passively cooled waterproof propulsion unit for a watercraft is provided comprising a substantially cylindrical housing including an outer wall having an external surface and an internal surface. The cylindrical housing includes a first end cap attached at a first end of the housing. The first end cap includes an attachment interface configured to be mounted to a strut of a watercraft such that at least a portion of the external surface of the outer wall of the housing is configured to contact a fluid surrounding the housing when the watercraft operates within the fluid. The propulsion unit further includes an electric motor disposed with in the housing and an electronic speed controller. The electronic speed controller is electrically coupled to the electric motor and configured to provide electrical power to the electric motor to operate the electric motor.

A watercraft and a waterproof electronics container are provided. The watercraft includes a flotation portion. A strut is removably affixed to a portion of the watercraft. A first connector portion is mounted to the upper end of the strut. A waterproof electronics container includes a second connector portion is disposed such that the second connector forms at least one electrically conductive pathway with the first connector portion when both are affixed to the watercraft. The waterproof electronics container is removably affixed to the said watercraft. In one aspect, the waterproof electronics container houses a power source capable of powering an electric motor that propels the watercraft.

A watercraft and a waterproof electronics container are provided. The watercraft includes a flotation portion. A strut is removably affixed to a portion of the watercraft. A first connector portion is mounted to the upper end of the strut. A waterproof electronics container includes a second connector portion is disposed such that the second connector forms at least one electrically conductive pathway with the first connector portion when both are affixed to the watercraft. The waterproof electronics container is removably affixed to the said watercraft. In one aspect, the waterproof electronics container houses a power source capable of powering an electric motor that propels the watercraft.

A protective motor cover assembly includes a cylinder that is positionable over an outboard boat motor. The cylinder is comprised of a resiliently stretchable material to conform to contours of the outboard boat motor. The cylinder is comprised of an opaque material to protect the outboard boat motor from sunlight. Indicia are printed thereon on the cylinder to enhance the ornamental appearance of the outboard boat motor. A drawstring is slidably integrated into the cylinder. The drawstring closes the cylinder around the outboard boat motor when the drawstring is tightened for retaining the cylinder around the outboard boat motor.

A watercraft and a waterproof electronics container are provided. The watercraft includes a flotation portion. A strut is removably affixed to a portion of the watercraft. A first connector portion is mounted to the upper end of the strut. A waterproof electronics container includes a second connector portion is disposed such that the second connector forms at least one electrically conductive pathway with the first connector portion when both are affixed to the watercraft. The waterproof electronics container is removably affixed to the said watercraft. In one aspect, the waterproof electronics container houses a power source capable of powering an electric motor that propels the watercraft.

A boat includes a hull, a deck, and a bow hatch. An engine compartment is provided in the hull. The deck is mounted on an upper portion of the hull. The deck includes an air inlet port that opens rearward to supply air to the engine compartment. The bow hatch is attached to the deck. The bow hatch includes a wall that faces the air inlet port.