A cowling for an outboard motor has port and starboard intake ports that direct flow of intake air into the cowling and extend downwardly along the aftward side of the cowling and face laterally outwardly. A duct system receives and conveys intake air intake ports to an intake conduit for the outboard motor. The duct system includes port and starboard intake troughs that extend alongside the intake ports and redirect the intake air from a generally lateral flow into the intake ports to a generally vertically downward flow and then to a generally forward flow towards the intake conduit. Port and starboard baffles that extend alongside the intake ports and direct flow of water into port and starboard channels located alongside the baffles, respectively. The channels drain the water by gravity depending on tilt and trim orientation of the outboard motor.

A motor vehicle has an air intake system with an air duct. The air duct has an air inlet for taking in ambient air and an air outlet. The air duct has a curved bent section which, upstream, is closer to a vehicle running surface than downstream. In the event of a water level of water entering the air duct that is rising parallel to the vehicle running surface, the internal cross section of the bent section is closed by the water before the water can pass the bent section. A plurality of air openings downstream of the bent section is introduced through a wall of the duct in an outer surface of the duct that points away from the vehicle running surface.

An outboard motor includes a mount on which an engine is mounted, an engine cover, and a sealing structure. The engine cover is divisible into a top portion, a front bottom portion, and a side bottom portion. A first seal in the sealing structure integrally includes a first portion, a second portion, and a third portion. The first portion seals the boundary between the top portion, the front bottom portion, and the side bottom portion. The second portion seals the boundary between the front bottom portion, the mount, and the side bottom portion. The third portion seals the boundary between the front bottom portion and the side bottom portion.

Combustion air intake ports are provided on left and right side faces of an upper part of an engine cover. An outer louver is disposed to confront the combustion air intake port, and an inner louver is disposed inward of the outer louver at a predetermined interval to face the outer louver. The combustion air received from the combustion air intake port passes through the outer louver and the inner louver and is guided to the engine unit from the guide hole. In this case, a splash of water is dispersed in the outer louver, and a large-sized water droplet falls down due to its self-weight before the combustion air reaches the inner louver, so that a small-sized water droplet can be collected and removed using inertial impaction at the inner louver. Therefore, it is possible to effectively separate water.

An outboard motor includes a mount on which an engine is mounted, an engine cover, and a sealing structure. The engine cover is divisible into a top portion, a front bottom portion, and a side bottom portion. A first seal in the sealing structure integrally includes a first portion, a second portion, and a third portion. The first portion seals the boundary between the top portion, the front bottom portion, and the side bottom portion. The second portion seals the boundary between the front bottom portion, the mount, and the side bottom portion. The third portion seals the boundary between the front bottom portion and the side bottom portion.

A method and system to restrict the flow of accumulated liquid water from the intake manifold into the cylinders of an internal combustion engine by reducing the velocity of contained liquid water as it moves through the containment feature during vehicle maneuvering are disclosed. The body of the intake manifold includes a water containment feature having a water containment reservoir having an open upper portion and water-restricting interior walls. A water passageway is provided in each interior wall. The water passageway may be of any of several shapes, including a V-shape notch extending from the top of the wall. The interior wall is a central interior wall and the containment reservoir further includes an intermediate interior wall between the side walls that intersects the central interior wall. The water passageway is formed in at least one of the interior walls and may be formed in all of the walls.

A motor vehicle has an air intake system with an air duct. The air duct has an air inlet for taking in ambient air and an air outlet. The air duct has a curved bent section which, upstream, is closer to a vehicle running surface than downstream. In the event of a water level of water entering the air duct that is rising parallel to the vehicle running surface, the internal cross section of the bent section is closed by the water before the water can pass the bent section. A plurality of air openings downstream of the bent section is introduced through a wall of the duct in an outer surface of the duct that points away from the vehicle running surface.

The present invention is a system for air supply to the engine of a motor float comprising a bottom part and an upper part of the body defining the inner space of the float, in which a combustion engine is arranged, wherein the upper part of the body is in its front part provided with an air supply, characterized in that the combustion engine is arranged in the engine compartment and separated from the rest of the inner space of the float by means of a partition provided with a suction opening in its front part, wherein to provide the circulation of air in the inner space of the float a sealing rib extends from the front part of the partition towards the tip of the float, separating the air supply and suction opening from one another, wherein at least one rear pump for sucking the leaking water is arranged in the rear part of the inner space of the float. The main object of the invention is thus to use the interspace of the float to provide separation of water and air, when eventual separated water may be sucked away by a pump operating on any principle (electric, vacuum, etc.).

A method and a system to restrict the flow of accumulated liquid water from the intake manifold into the cylinders of an internal combustion engine by reducing the velocity of contained liquid water as it moves through the containment feature during vehicle maneuvering are disclosed. The body of the intake manifold includes a water containment feature having a water containment reservoir having an open upper portion and water-restricting interior walls. A water passageway is provided in each interior wall. The water passageway may be of any of several shapes, including a V-shape notch extending from the top of the wall. The interior wall is a central interior wall and the containment reservoir further includes an intermediate interior wall between the side walls that intersects the central interior wall. The water passageway is formed in at least one of the interior walls and may be formed in all of the walls.

A valve (1,1) for a marine propulsion unit comprises a body (2) having an internal passage (3) through the valve body (2). An aperture (5) in the valve body communicates with the internal passage (3). A piston (4,4) is moveably mounted within the internal passage. The valve is configured such that, upon immersion or expected immersion of part (such as an air intake) of an associated propulsion unit in water or tilting of the associated propulsion unit beyond a predefined angle, the piston moves to a first position within the internal passage in which it seals the aperture. If for example the air intake of a marine propulsion unit of a vessel is connected to the aperture (3), the effect of the piston sealing the aperture (5) is to isolate the air intake from the atmosphere. Thus if the vessel sinks or capsizes, the valve closes the air intake of the propulsion unit and so prevents entry of water into the propulsion unit.