In one embodiment, an electric outboard motor includes a motor casing in which an electric motor and a propeller shaft are accommodated; a shaft configured to connect the motor casing to an operation handle; a fixing member configured to fix the shaft to a hull; and a shaft adjuster provided on the shaft and configured to adjust distance between the motor casing and the fixing member.

The invention relates to a watercraft having a hull (10) which has a hydrofoil assembly (20) in the region of the stern (12) and another hydrofoil assembly (30) in the region of the bow (11), the hydrofoil assemblies (20, 30) each having hydrofoils (21, 31) arranged on both sides of the hull (10). To achieve a stable position in the water while ensuring good driving dynamics under a wide range of conditions, according to the invention the hydrofoil assemblies (20, 30) are coupled to at least one adjustment unit (22, 32) such that the bow-side hydrofoil assembly (20) and the stern-side hydrofoil assembly can each be at least partially individually height adjustable (FIG. 1).

An entertainment barge includes at least two pontoons, a first deck having a front, rear, right side and left side, is attached to both pontoons. A second deck is disposed above and substantially parallel to the first deck. At least two retractable spuds are attached to the deck and are adapted to be lowered into the water to secure the barge in a fixed position.

An outboard-motor mounting device is provided with: a clamp bracket (20) to be attached to a stern portion (15) of a hull; a swivel bracket (60) disposed between the clamp bracket and an outboard motor body (1); a trim-tilt equipment (40) that swings the outboard motor body back and forth via the swivel bracket; and a lift equipment (30) that lifts or lowers the outboard motor body via the swivel bracket. The lift equipment having a lift cylinder (33) for lifting is liftably supported on the clamp bracket, and the trim-tilt equipment having a tilt cylinder (44) and a trim cylinder (47) is disposed behind the lift equipment so that the tilt cylinder is positioned behind the lift cylinder and the trim cylinder is positioned on the side of the tilt cylinder.

A jack plate includes a mounting assembly having first and second spacing brackets connected by a transom plate adapted for mounting to the transom of a boat, each of the spacing brackets having inwardly facing channels at rearward sides of the spacing brackets. The jack plate further includes a motor lift including a lift plate extending between a first bearing and a second bearing, the channels adapted to conformingly receive the first and second bearings. An actuator is provided to raise and lower the lift plate relative to the transom plate. At least one spring is operably coupled between the mounting assembly and the motor lift, the spring unloading the lift plate to re-duce load on the actuator. The spring is optionally a compression gas spring.

A universal wall and bridge mounted aeration apparatus has a track extending between two distinct elevations that is coupled to a wall and bridge mount. An aeration unit is pivotally coupled to the track and has an aerator adapted to operatively at least partially submerge within and aerate a liquid. A selective mover or drive is adapted to operatively move the aeration unit along the track and thereby vary an elevation of the aeration unit. The universal wall and bridge mount supports the track and aeration unit. The universal wall and bridge mount has a first configuration for mounting to a structure such as a stationary bridge, and a second configuration for mounting to a wall. The universal wall and bridge mounted aeration apparatus may be adjusted to position the propeller after installation under the surface of the liquid through three axes of motion freedom.

Combination of boat and outboard engine, in which at least one outboard engine is fastened to the transom of the boat in a prearranged position, the engine being mounted to translate along a path with at least one motion component having a vertical orientation in a direction away from or close to the waterline of the boat, that is, of smaller or greater propeller draft, and a motion component having a horizontal or longitudinal orientation in a direction away from or close to the transom of the boat.

System and methods are provided that relate to a drive arrangement for propelling a boat, in particular a kayak. In some embodiments, the drive arrangement can include an electric drive motor with a shaft and a receiving device for receiving the shaft. An arresting element can be provided for determining a first desired distance along the shaft between the receiving device and the drive motor.

A system for controlling a marine vessel comprises an input device for inputting an operator command, a sensor which senses and signals an engine function variable or a vessel dynamic variable, and a first structural element and a second structural element. The first structural element and the second structural element each control speed or direction of motion of the marine vessel, and the first structural element and the second structural element each affect the marine vessel dynamic variable. There is a controller which receives the operator command and the engine function variable or the vessel dynamic variable. The controller moves the first structural element and the second structural element based on the engine function variable or the vessel dynamic variable, after receiving the single operator command.

A marine device assembly, such including a trolling motor and/or at least one sonar transducer, is provided for attachment to a watercraft. The trolling motor and/or sonar transducer is attached at an end of a shaft. The marine device assembly includes a position adjustment assembly comprising a plurality of rotatable drums surrounding the shaft that are configured to adjust the rotational and/or vertical position of the trolling motor and/or sonar transducer(s) in accordance with a position adjustment command. In various aspects, the drums are configured to independently rotate about the shaft in a clockwise or counterclockwise direction so as to cause the trolling motor and/or sonar transducer(s) to rotate about the central axis of the shaft and/or translate along the central axis of the shaft.