An electrically driven propulsion system for a watercraft comprises an electric motor, a pulse inverter, a thrust bearing, and a transmission is presented. The pulse inverter can be electrically coupled to the electric motor and adapted to provide an electrical supply power of at least 50 kW to the electric motor. The electrically driven propulsion system further comprises a common waterproof housing. An external section of the transmission can be arranged outside of the common waterproof housing. The transmission can be adapted to rotationally couple the external section of the transmission to the electric motor. The thrust bearing can be mechanically coupled to the rotary shaft of said transmission and to the common waterproof housing. The thrust bearing can be adapted to transfer a force applied to the transmission along an axial direction of said rotary shaft of the transmission to the common waterproof housing.

An electrically driven propulsion system for a watercraft comprises an electric motor, a pulse inverter, a thrust bearing, and a transmission is presented. The pulse inverter can be electrically coupled to the electric motor and adapted to provide an electrical supply power of at least 50 kW to the electric motor. The electrically driven propulsion system further comprises a common waterproof housing. An external section of the transmission can be arranged outside of the common waterproof housing. The transmission can be adapted to rotationally couple the external section of the transmission to the electric motor. The thrust bearing can be mechanically coupled to the rotary shaft of said transmission and to the common waterproof housing. The thrust bearing can be adapted to transfer a force applied to the transmission along an axial direction of said rotary shaft of the transmission to the common waterproof housing.

A watercraft includes a deck, a hull, an engine assembly disposed in the engine compartment and including an engine, a drive system powered by the engine, and at least one acoustic panel. The hull partly defines an engine compartment having an engine compartment length. The engine has an engine length that is less than half of the engine compartment length. The at least one acoustic panel is disposed in the engine compartment to partially divide the engine compartment into a plurality of sub-compartments. In a vertical plane perpendicular to a longitudinal centerplane of the watercraft and extending through the at least one acoustic panel, the at least one acoustic panel occupies part of at least a majority of the cross-sectional area of the engine compartment that is not occupied by an engine assembly cross-sectional area, which is defined by a projection of the engine assembly on the vertical plane.

A stern drive for a marine vessel, the stern drive having a drive assembly configured to generate a thrust force in water, a powerhead configured to power the drive assembly, and a mounting assembly configured to couple the drive assembly to the transom outside of the marine vessel and to suspend the powerhead on the transom inside of the marine vessel. The mounting assembly has a vibration dampening member which isolates vibrations of the drive assembly and the powerhead relative to the transom. The powerhead, and the mounting assembly are installed on the marine vessel as a single component from outside the transom.

A stern drive for a marine vessel having a transom. The stern drive has a drive assembly comprising a drive unit configured to generate a thrust force in water and a powerhead configured to power the drive unit, and a transom bracket assembly configured to support the drive unit outside of the transom and further configured to support the powerhead inside of the transom, wherein the transom bracket assembly is configured to vibrationally isolate the drive unit and powerhead relative to the transom.

A mounting structure for mounting a propulsion unit to a hull of a floating structure includes a first mounting surface and a sealed portion provided on the first mounting surface for sealing the propulsion unit to the hull. The first mounting surface is further provided with a pivot point provided at an edge or in the vicinity of an edge of the first mounting surface and outside the sealed portion, and at least two first protrusions spaced from each other on the first mounting surface. Each of the first protrusions includes a surface at least on a side of the first protrusion facing away from the pivot point, which surface is formed at least in a direction perpendicular to the first mounting surface in a manner dependent of a distance between the pivot point and the surface in such a manner that the first protrusion provided in a cylindrical cavity formed in a counterpart is configured to guide a mutual tilting movement of the cylindrical cavity and the first protrusion, when the mounting structure and, thus, the first protrusions are tilted with respect to the cylindrical cavities about the pivot point.

A mounting structure for mounting a propulsion unit to a hull of a floating structure includes a first mounting surface and a sealed portion provided on the first mounting surface for sealing the propulsion unit to the hull. The first mounting surface is further provided with a pivot point provided at an edge or in the vicinity of an edge of the first mounting surface and outside the sealed portion, and at least two first protrusions spaced from each other on the first mounting surface. Each of the first protrusions includes a surface at least on a side of the first protrusion facing away from the pivot point, which surface is formed at least in a direction perpendicular to the first mounting surface in a manner dependent of a distance between the pivot point and the surface in such a manner that the first protrusion provided in a cylindrical cavity formed in a counterpart is configured to guide a mutual tilting movement of the cylindrical cavity and the first protrusion, when the mounting structure and, thus, the first protrusions are tilted with respect to the cylindrical cavities about the pivot point.

A bracket for mounting a thruster to a boat includes horizontal and vertical members disposed at right angles to each other. The horizontal member includes an enclosure which contains a lamp. A thruster is mounted to the horizontal member, and the vertical member is affixed to the transom of a boat. The thruster is therefore held in spaced-apart relation to the boat, optimizing the flow of water through the thruster, and minimizing the amount of space required, on the transom, for installation of components. The horizontal member, and one of the connectors holding the vertical member to the boat, are hollow, allowing wires to extend into the horizontal member, to provide power to the thruster and the lamp.

A bracket for mounting a thruster to a boat includes a horizontal neck portion, an upper mounting support portion, a support plate portion that extends downward from the upper mounting support portion, and an enclosure portion. The support plate portion and the rear of the upper mounting support portion form a transom-facing surface in a plane that is at a non-right angle relative to a horizontal plane. The transom-facing surface is angled such that the bottom of the support plate portion is further to the rear of the thruster bracket than the top of the upper mounting support portion in order to match the angle of the transom of a boat to which the thruster bracket is mounted. A thruster is mounted to the thruster bracket at a level where the thruster will be out of the water when the boat is moving fast and up on plane, and will be in the water when the boat is moving very slow.

A bracket for mounting a thruster to a boat includes a horizontal neck portion, an upper mounting support portion, a support plate portion that extends downward from the upper mounting support portion, and an enclosure portion. The support plate portion and the rear of the upper mounting support portion form a transom-facing surface in a plane that is at a non-right angle relative to a horizontal plane. The transom-facing surface is angled such that the bottom of the support plate portion is further to the rear of the thruster bracket than the top of the upper mounting support portion in order to match the angle of the transom of a boat to which the thruster bracket is mounted. A thruster is mounted to the thruster bracket at a level where the thruster will be out of the water when the boat is moving fast and up on plane, and will be in the water when the boat is moving very slow.