An outboard motor powerhead section includes an engine having vertically stacked cylinders. The engine includes intake passages extending through the cylinder head to the cylinders. A fuel rail extends along a vertical center axis alongside the cylinder head. Receiver cups are coupled to the fuel rail and vertically spaced from one another such that each receiver cup is associated with a respective cylinder. Each receiver cup has a respective connector passage providing fluid communication between the fuel rail and receiver cup. Fuel injectors are respectively coupled to the receiver cups. Each fuel injector has an inlet end located in a respective receiver cup and extends along a center axis toward a nozzle end that extends into a respective intake passage. A cowl covers the engine. The vertical center axis of the fuel rail is located relatively more inboard with respect to the engine than is at least one connector passage.

A trim-tilt device includes a first electric motor electrically connected to a power source and tilts an outboard motor body in an up-and-down direction. A steering device includes a second electric motor electrically connected to the power source. The steering device turns the outboard motor body in a right-and-left direction. A fuel pump is electrically connected to the power source, and supplies fuel to an engine. A controller limits an inrush current into the first electric motor using a PWM control for a predetermined period of time from a starting time point of an input current into the first electric motor.

A boat hull cooling and marine-drive system intended for use in a primary shallow water bottom environment includes a boat hull with an integrated internal engine heat exchanger, marine drive system and steering assembly. The steering assembly incorporates a ring-within-a-ring steering mechanism and an obstacle resistant shoe plate. Stabilizer fins positioned above the shoe plate at a position forward of the spinning propeller allow air and water to exit from the rear of the stabilizer fins away from the spinning propeller

The present invention relates to a kit for an LPG fuel for petrol run engines and in particular, a kit of electronic and hydraulic components for the realization of a dual fuelling LPG/petrol system (100) particularly suitable for outboard engines of boats navigating in waters with high salt content. Said kit includes a tube-bundle heat exchanger (10) and a pressure regulator (20) separated one from the other and made of antioxidant materials and devices. The heat exchanger (10) is provided at its end with two respective sacrificial anodes (12b, 11b) for the protection from corrosive galvanic currents and with one temperature sensor (11c) placed at one of said ends. The kit also includes a plurality of electrohydraulic LPG injectors (I) and an electronic control unit (CE) set to manage and adjust the operation of such injectors (I), of the pressure regulator (20) and of a plurality of other devices. Said kit also includes an electronic commutator (SW) set for a bilateral electrical connection with the electronic control unit (CE) and includes a switch for the commutation from one feeding mode (LPG) to another feeding mode (petrol) and vice versa.

A display device for an outboard motor includes a storage device storing unique information of the outboard motor. The display device for the outboard motor has a gauge mode and a service tool mode as display modes. By mounting the display device for the outboard motor to a specific boat, both an operating state of the outboard motor and the unique information of the outboard motor are displayable in the gauge mode. Only the unique information of the outboard motor is displayable in the service tool mode. The display modes are configured to be switched between the gauge mode and the service tool mode.

An outboard motor includes an internal combustion engine. The internal combustion engine includes a cylinder head including a fuel injector including an injection portion, and an ignition including an ignition portion that provides ignition within a combustion chamber. The ignition portion is deviated in an upward-downward direction, in which a valve actuating shaft extends, with respect to the injection portion in a central region of the combustion chamber. The ignition is mounted in the cylinder head.

An outboard motor unit includes a first outboard motor including a supercharger that is located inside a first cowling and supplies compressed air to a first engine, a second outboard motor including a second cowling and a second engine housed in the second cowling, and an air passage through which the air compressed by the supercharger of the first outboard motor is supplied to the second engine of the second outboard motor.

A transom bracket for mounting a marine drive unit to the hull of a marine vessel is provided The transom bracket extends in a plane spanned by a first axis and by a second axis, where a third axis is normal to the plane, and where a center line of the transom bracket extends in the plane and parallel to the first axis. The transom bracket includes at least one drive unit support for holding the drive unit in position. The transom bracket includes a first water conduit and a second water conduit integrated in the transom bracket, where the first water conduit and the second water conduit extend from respective upper apertures formed in an upper part of the bracket to respective lower apertures formed in a lower part of the bracket, where the lower apertures are separated from each other by the center line.

A vessel propulsion apparatus includes an engine that rotates a crankshaft in a forward rotation direction, a rotation speed detector that detects a rotation speed of the crankshaft, a propeller shaft coupled to a propeller, a shift switch that switches between a shift-in state and a neutral state, a shift state detector, an intake passage, a throttle valve, an intake pressure sensor, and a controller. The controller determines that the crankshaft is reversely rotating by an external force input from the propeller shaft when a predetermined reverse rotation recording condition is satisfied, and stores reverse rotation information. The reverse rotation recording condition includes a condition that an intake pressure after the shift switch switches from a neutral state to a shift-in state while the crankshaft rotates in the forward rotation direction is larger than a value equal to or higher than atmospheric pressure.

An outboard motor includes an engine, an engine cover with which the engine is covered, an intake pipe disposed between an outer surface of the engine and an inner surface of the engine cover, and a battery. The engine includes a piston that reciprocates rectilinearly and a crankshaft that rotates around a crankshaft axis extending in an up-down direction. The intake pipe is connected to a first outer surface of the engine along the crankshaft axis, and supplies air to the engine. The battery is disposed between a second outer surface of the engine, which is different than the first outer surface, and the inner surface of the engine cover.