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 portable, modular, water turbine solution consisting of a mount base, water turbine, and watercraft appropriate controller. The mount base is attachable to a variety of personal watercraft using a mounting mechanism, such as, but not limited to, a nylon strap or adhesive. The motors can be easily detached from one mount on a watercraft to another mount on a different watercraft. Different control schemes may also be swapped out depending on the watercraft in question.

A portable, modular, water turbine solution consisting of a mount base, water turbine, and watercraft appropriate controller. The mount base is attachable to a variety of personal watercraft using a mounting mechanism, such as, but not limited to, a nylon strap or adhesive. The motors can be easily detached from one mount on a watercraft to another mount on a different watercraft. Different control schemes may also be swapped out depending on the watercraft in question.

A marine propulsion system for a marine vessel has a drive unit comprising an upper part and a lower part, the upper part being pivotable in relation to the marine vessel and the lower part is rotatably connected with the upper part, the lower part comprises one or more propellers. An input unit receives an activation message indicative of an operation mode for the drive unit. A control unit is connected with the drive unit and the input unit. The control unit controls the drive unit on basis of the activation message received from the input unit. The control unit, in response to receiving a beach mode activation message from the input unit, rotates the lower part to a position with the one or more propellers facing aft in relation to the marine vessel, and/or wherein the control unit, in response to receiving a swim mode activation message from the input unit, rotates the lower part to a position with the one or more propellers at least facing forward in a position of minimum 90 degrees compared to an aft facing position of the one or more propellers.

A marine propulsion system for a marine vessel has a drive unit comprising an upper part and a lower part, the upper part being pivotable in relation to the marine vessel and the lower part is rotatably connected with the upper part, the lower part comprises one or more propellers. An input unit receives an activation message indicative of an operation mode for the drive unit. A control unit is connected with the drive unit and the input unit. The control unit controls the drive unit on basis of the activation message received from the input unit. The control unit, in response to receiving a beach mode activation message from the input unit, rotates the lower part to a position with the one or more propellers facing aft in relation to the marine vessel, and/or wherein the control unit, in response to receiving a swim mode activation message from the input unit, rotates the lower part to a position with the one or more propellers at least facing forward in a position of minimum 90 degrees compared to an aft facing position of the one or more propellers.

A modular watercraft is disclosed which includes plural connectable modules and which can be broken down for ease of handling, transport and storage. The watercraft includes novel means for connecting separate modules. The connectable modules may be storable within a single one of the modules.

A modular watercraft is disclosed which includes plural connectable modules and which can be broken down for ease of handling, transport and storage. The watercraft includes novel means for connecting separate modules. The connectable modules may be storable within a single one of the modules.

A boat hull (1) for a boat, with a boat drive (2) which extends through a hull opening (3) in the bottom of the boat hull (1). The boat drive (2) is connected to the boat hull (1) by at least one fastening member (4). To do this, at least one positioning element (5) is provided, on the outside (6) of the boat hull (1), for positioning the fastening member (4) relative to the boat hull (1).

A jet propelled watercraft includes a watercraft body, an engine in the watercraft body, a jet pump configured to generate a jet thrust by a driving force of the engine, an intake pipe configured to supply air to the engine, an air intake box, and a filter. The air intake box includes a connecting port connected to the intake pipe and an inlet configured to take in ambient air. The filter is disposed in a space in an internal space of the air intake box. The filter divides the space into a lower region and an upper region. The lower region is connected to the inlet and the upper region is located higher than the lower region and connected to the connecting port. The filter is configured to clean air taken into the internal space from the inlet and directed to the connecting port.

An improved human powered watercraft propulsion device and mounting frame for attachment to existing pontoon watercraft. The propulsion device is light weight, self-contained, portable, has few moving parts made from corrosive resistant materials, and is propeller driven for quiet, efficient, and environmentally friendly underwater propulsion. Having a simple twisted belt configuration with an open structural design, all of the components are easily viewed and maintained by the user, as well as continuously cleaned, cooled, and lubricated by the water during operation, without the need for a sealed waterproof housing and internal oil bath. Hand knobs provide belt tensioning during operation and the device is adapted for operation by pedal, friction wheel, or direct chain drive. The device is adjustable on the attachment frame to fit the operator, pivots when beaching or striking an underwater object, and components such as pulleys and the propeller are changeable to achieve different power ratios.