Disclosed are devices, methods and/or systems for use in protecting items and/or structures that are exposed to, submerged and/or partially submerged in aquatic environments from contamination and/or fouling due to the incursion and/or colonization by specific types and/or kinds of biologic organisms and/or plants, including the protection from micro- and/or macro-fouling for extended periods of time of exposure to aquatic environments.

A personal watercraft is disclosed including a flotation portion, a strut extending from the flotation portion, and a motor pod is disposed along the strut with an electric motor operably coupled to a driveshaft. A hydrojet unit is removably attached to the motor pod and includes an inlet portion removably attached to the motor pod and a substantially cylindrical housing. The inlet portion includes a substantially conical motor interface with a shaft through-hole for receiving the driveshaft therein, one or more fins extending outwardly from the conical motor interface, and at least one ring encircling the conical motor interface and connecting to each of the one or more fins for inhibiting objects from passing through the inlet region. The housing defines a fluid flow path to an outlet portion. The hydrojet unit includes an impeller coupled to the driveshaft and a stator disposed within the housing.

The present invention is a combination apparatus having a body with two separate mating arms made of sacrificial anode material and a pair of oppositely disposed removable cutting blades made of material such as stainless steel. A respective cutting blade extends through an interior of a respective mating arm and extends outwardly from an exterior surface of a respective mating arm with cutting teeth of each respective cutting blade aligned with a slope of the exterior surface of a respective mating arm.

A portable propulsion system for a watercraft may include a shaft, a propeller, an outer casing, and a flexible strap. The shaft may have a prop end section, a drive end section, and a rotational axis extending from the prop end section to the drive end section. The propeller may be connected to the prop end section of the shaft. The drive end section may be configured for removable connection to a driver for rotation of the propeller via rotation of the shaft about the rotational axis to propel the watercraft. The outer casing may be disposed around the shaft. The flexible strap may have first and second end sections connected to the outer casing in respective first and second regions.

An outboard drive assembly for a work boat is provided. In embodiments, an outboard drive assembly includes a lower outdrive assembly including: a housing extending between a first and end a second end and having a motor housed therein; a propeller mounted to the first end of the housing; first and second fins extending horizontally from opposing side portions of the motor housing; a third fin extending vertically from the housing; respective cutting blades attached to respective end portions of each of the first, second and third fins adjacent the propeller; an upper outdrive assembly including mounting brackets configure to connect the upper drive assembly to a deck of a work boat; and a drive arm assembly pivotally mounted to the lower outdrive assembly at a first end of the drive arm assembly and mounted to the upper outdrive assembly at a second end of the drive arm assembly.

A hydrofoil shield for protecting a boat motor includes a shield body, two fins, a nose section, and a tail section, wherein the shield body has a central shield portion with fins extending therefrom and the nose section disposed forward of the body, wherein the shield body and fins are symmetrical about a longitudinal axis extending from the nose section to the tail section, and wherein the fins curve toward the central shield portion at a dihedral/sweep angle forming a U-like shape.

The object of the invention is an inflatable watercraft (1) (SUPstand up paddling) with an embedded drive and having a specially shaped recess in the centre, preferably in the centre of gravity of the watercraft (1), into which a housing (2, 2) of a drive assembly is inserted before the watercraft is filled with air. While the watercraft (1) is filled with air, the air pressure firmly fixes the housing (2, 2) of the drive assembly to a proper position. The housing (2, 2) accommodates the drive assembly that comprises a storage battery (4), an electric motor (5), a compressor (3) and an electronic circuit (8), wherein the drive assembly is provided with a flow-through channel (6), in which a drive screw (7) is arranged, and both the input and the output sides of the flow-through channel (6) are protected by grates.

THIS invention relates to a propeller and more particularly but not exclusively, to a propeller for use with inboard and outboard boat engines. The propeller includes a hub and a plurality of blades extending radially outwardly from the hub, wherein each blade comprises a blade body having a blade face and a blade back, with the blade body terminating in a peripheral zone. The propeller also includes blade edge covering members which are releasably securable to at least part of the peripheral zone of the blade so as to cover a radially outer edge of the peripheral zone.

Disclosed are devices, methods and/or systems for use in protecting items and/or structures that are exposed to, submerged and/or partially submerged in aquatic environments from contamination and/or fouling due to the incursion and/or colonization by specific types and/or kinds of biologic organisms and/or plants, including the protection from micro- and/or macro-fouling for extended periods of time of exposure to aquatic environments.

An outboard drive assembly for a work boat is provided. In embodiments, an outboard drive assembly includes a lower outdrive assembly including: a housing extending between a first and end a second end and having a motor housed therein; a propeller mounted to the first end of the housing; first and second fins extending horizontally from opposing side portions of the motor housing; a third fin extending vertically from the housing; respective cutting blades attached to respective end portions of each of the first, second and third fins adjacent the propeller; an upper outdrive assembly including mounting brackets configure to connect the upper drive assembly to a deck of a work boat; and a drive arm assembly pivotally mounted to the lower outdrive assembly at a first end of the drive arm assembly and mounted to the upper outdrive assembly at a second end of the drive arm assembly.