A low emission submersible engine is part of a multipurpose aquatic device, such as an aquatic craft or an electrical generator. A propulsion system having a propeller is coupled to the submersible engine to produce a swimmer propulsion machine and a generator is attached to the engine to produce an electrical generator. The submersible engine receives air from a snorkel that extends up above a water line. The aquatic device has a fuel reservoir which may receive liquid fuel or may receive a fuel cylinder. Floatation chambers keep the aquatic device afloat with the engine submerge. The exhaust assembly and exhaust ports from the engine may also be submerged and the exhaust ports may provide additional thrust. A propulsion system housing integrates the drive shaft and propeller, clutch coupler, exhaust conduits and water flow conduits and is detachably attachable to the engine.

The purpose of the present invention is to provide an engine in which operation of a control system and communication of information can be performed easily form above the engine. A blank part is formed in a top cover provided on an upper surface of an engine arranged in an engine room of a ship so as to penetrate vertically the top cover, an engine side operation part is arranged so as to face the blank part, and an upper end of the engine side operation part is positioned lower than an upper surface of the top cover.

The purpose of the present invention is to provide an engine in which operation of a control system and communication of information can be performed easily form above the engine. A blank part is formed in a top cover provided on an upper surface of an engine arranged in an engine room of a ship so as to penetrate vertically the top cover, an engine side operation part is arranged so as to face the blank part, and an upper end of the engine side operation part is positioned lower than an upper surface of the top cover.

An electrically powered watercraft, comprising a hull (1), a propulsion device (2) provided at a stern of the hull and including a motor (10) and a propulsion unit (11) driven by the motor, an electrical box (6) that is placed on one side of a rear part of the hull and houses an electric component therein, a battery box (5) for housing a battery for supplying electric power for driving the motor, the battery box being positioned at a predetermined distance in front of the electrical box, a first cable (6) extending from the battery box to the electrical box, and a second cable (7) extending from the electrical box to the motor.

An electrically powered watercraft, comprising a hull (1), a propulsion device (2) provided at a stern of the hull and including a motor (10) and a propulsion unit (11) driven by the motor, an electrical box (6) that is placed on one side of a rear part of the hull and houses an electric component therein, a battery box (5) for housing a battery for supplying electric power for driving the motor, the battery box being positioned at a predetermined distance in front of the electrical box, a first cable (6) extending from the battery box to the electrical box, and a second cable (7) extending from the electrical box to the motor.

An electric unit for electrically powered watercraft, comprising an electrical box (5) including a side wall and a detachable top cover (21), and a battery box (4) provided separately from the electrical box, wherein an electric component (22-25) is attached to an inner surface of the side wall.

An electric unit for electrically powered watercraft, comprising an electrical box (5) including a side wall and a detachable top cover (21), and a battery box (4) provided separately from the electrical box, wherein an electric component (22-25) is attached to an inner surface of the side wall.

An outer drive protection arrangement is attachable to a marine vessel while not immersed in water. The arrangement comprises a rim portion arranged in contact with at least a transom surface and surrounding at least one outer drive and a protective cover attached to the rim portion and enclosing a volume encompassing the at least one outer drive, in order to provide a protective gaseous environment inside the cover. The environment contained within the cover is circulated and maintained at a predetermined atmospheric condition by means of a source of conditioned gas.

An outer drive protection arrangement is attachable to a marine vessel while not immersed in water. The arrangement comprises a rim portion arranged in contact with at least a transom surface and surrounding at least one outer drive and a protective cover attached to the rim portion and enclosing a volume encompassing the at least one outer drive, in order to provide a protective gaseous environment inside the cover. The environment contained within the cover is circulated and maintained at a predetermined atmospheric condition by means of a source of conditioned gas.

An assembly is for aligning and stabilizing first and second cowl portions on a marine engine. The assembly comprises an engagement member configured to be fixed to the first cowl portion and a retainer apparatus configured to be fixed to the second cowl portion. The retainer apparatus is configured to receive the engagement member when one of the first cowl portion and second cowl portion is moved towards the other of the first cowl portion and the second cowl portion. The retainer apparatus comprises a retainer body and opposing guide members that are pivotable with respect to the retainer body. As the retainer apparatus receives the engagement member, the engagement member engages and causes the guide members to pivot with respect to the retainer body such that the engagement member becomes sandwiched between the guide members, thus aligning and stabilizing the first and second cowl portions.