An intake manifold is connected to a cylinder of an engine, and extends backward from the cylinder. A throttle body is attached to the intake manifold. As seen in a plan view of an outboard motor, the throttle body is disposed backward of a head cover, while being disposed inward of a lateral end of the intake manifold in a right-and-left direction of the outboard motor.

An intake manifold is connected to a cylinder head, and extends backward therefrom. An injector is attached to either the cylinder head or the intake manifold. At least one of the cylinder head and the intake manifold includes a curve pipe portion shaped to curve backward from a lateral surface of the cylinder head. An injector is attached to the cylinder head at either an outer lateral surface of the curve pipe portion in a right-and-left direction of an outboard motor or a position located forward of the curve pipe potion.

An outboard motor 10 includes an engine 16, a fuel tank 25, a propeller 17 which is configured to be driven by the engine 16, a case member 18 which rotatably supports the propeller 17, a recoil starter 29 which is configured to cause the engine 16 to start by manually rotating a crankshaft of the engine 16, and a cover member 16 which is mounted on the case member 18 so as to cover the engine 16, the fuel tank 25, and the recoil starter 29. The recoil starter 29 includes a recoil cover 34, which is formed with an air passage hole 34c.

An outboard motor 10 includes an engine 16, a fuel tank 25, a propeller 17 which is configured to be driven by the engine 16, a case member 18 which rotatably supports the propeller 17, a recoil starter 29 which is configured to cause the engine 16 to start by manually rotating a crankshaft of the engine 16, and a cover member 16 which is mounted on the case member 18 so as to cover the engine 16, the fuel tank 25, and the recoil starter 29. The recoil starter 29 includes a recoil cover 34, which is formed with an air passage hole 34c.

A vessel propulsion apparatus includes an engine and a propulsion unit to be driven by the engine. The engine includes a cylinder head including a combustion chamber and a pair of intake openings to communicate with the combustion chamber. The engine further includes a pair of intake ports respectively including a pair of downstream portions respectively connected to the pair of intake openings. A distance between the pair of downstream portions decreases toward the pair of intake openings.

A watercraft includes a deck and a hull having a transom, right and left side portions a tunnel, and a bottom portion. An air intake system disposed in the engine compartment and fluidly communicating with an engine includes an air compressor and an intercooler. The intercooler includes a housing having a lower surface extending generally along the bottom hull portion, an upper surface extending thereabove, an intercooler air inlet, an intercooler air outlet spaced from the intercooler air inlet at least in a direction parallel to the lower surface, a water inlet, and a water outlet. An intercooler core enclosed within the housing defines at least one air channel fluidly communicating with the intercooler air inlet and the intercooler air outlet. At least one water channel fluidly communicating with the water inlet and outlet is diathermally connected with the at least one air channel for cooling air flowing therein.

A marine drive has a propulsion unit, a supporting cradle, a resilient mount that couples the propulsion unit to the supporting cradle, a sound blocking member that extends across an internal gap between the propulsion unit and the supporting cradle, and a cowling system having upper and lower cowlings that cover at least a portion of the propulsion unit and lower cradle covers that cover at least a portion of the supporting cradle. The upper and lower cowlings are separated from the lower cradle covers by an external gap so that the upper and lower cowlings can move along with the propulsion unit and with respect to the supporting cradle and the cradle covers. The sound blocking member blocks the sound which otherwise would emanate from propulsion unit via the internal gap and then from the marine drive via the external gap.

To provide an intake manifold which can reliably prevent the step from being formed in the inner wall surface of the intake passage (15) while having provided therein the fitting holding portion (32) for fitting and holding the flame arrester (25) in the axial direction, the intake manifold (10) includes a base member (21), a cover member (22) and a flame arrester (25) having a flame suppression structure. Between the flame arrester (25) and the radical stepped surface (31b) of the recessed body portion (31) is provided a retaining rectifying member (23) that prevents the flame arrester (25) from coming off with respect to the fitting holding portion (32) and forms a third inner peripheral surface (23a) continuous without a step from an opening portion on the other end side (25b) of the flame arrester (25) to the base side second inner wall surface (31c).

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.

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.