Abstract: A personal watercraft configured to plane on a water surface is disclosed. The personal watercraft typically includes an attitude sensor configured to detect an attitude of a body of the watercraft, a propulsion force changing system configured to change a propulsion force of the watercraft to control the attitude of the body, and a controller configured to control the propulsion force changing system according to the attitude of the body which is detected by the attitude sensor.

Abstract: A personal watercraft including a body including a hull and a deck covering the hull from above, an engine accommodated in an interior of the body, and an exhaust system that is accommodated in the interior of the body. The exhaust system includes an upstream muffler and a downstream muffler located on an upstream side and on a downstream side in a flow of the exhaust gas, the exhaust gas emitted from the engine flowing through the upstream and downstream mufflers, a first exhaust pipe through which the upstream and downstream mufflers communicate with each other, and a second exhaust pipe configured to extend from the downstream muffler outside the body. The upstream muffler and the downstream muffler are arranged in parallel, and the second exhaust pipe extends from the downstream muffler through a region that is located closer to the engine than the first exhaust pipe.

Abstract: A stand-up type personal watercraft is disclosed. The stand-up type personal watercraft typically includes a body including a hull and a deck covering the hull from above and being provided with a foot deck on an upper surface of a rear portion thereof to allow a rider to ride thereon, a handle pole configured to extend rearward in a longitudinal direction of the body, the handle pole having a steering handle attached to a rear end portion thereof, the handle pole being configured to be mounted to the deck such that a front end portion of the handle pole is attached to a front portion of the deck and the handle pole is vertically pivotable around the front end portion thereof, and a display device mounted to the handle pole and configured to display information regarding the watercraft.

Abstract: A steering device of a small watercraft is disclosed. The device includes a steering column oriented substantially in the vertical direction, wherein the steering column includes an upper component and a lower component, the components being coupled together so as to be movable relative to each other in the longitudinal direction thereof, and a fastening device configured to lock the relative movement of the components. One of the components includes an elongated hole which penetrates in the left-and-right direction and is elongated in the vertical direction. The other component includes a protrusion extended in the left-and-right direction so as to be accommodated in the elongated hole and to be guided by the hole in the vertical direction. The components each include a contact surface having a plurality of teeth arranged in the vertical direction, and engage with each other in the front-and-rear direction by engaging the teeth.

Abstract: A body structure of a water-jet propulsion personal watercraft, comprises a body having an inner space defined by a hull and a deck, an engine mounted within the inner space of the body, a water jet pump placed behind the engine and configured to be driven by the engine, and a bulkhead placed behind the engine and configured to separate the inner space into an engine room on a front side within which the engine is contained, and a closed rear space on a rear side, wherein a first drain hole is provided in the closed rear space of the body so as to communicate with an outside of the watercraft.

Abstract: A main switch apparatus of a small watercraft is provided. The main switch apparatus of a small watercraft having a main switch. The main switch apparatus includes a plurality of keys, each for operating the main switch, each assigned a different user ID information. The main switch apparatus may further include an ID information detector for detecting the user ID information assigned to one of the plurality of keys applied to the main switch, a controller for controlling the small watercraft, configured to be activated by each one of the plurality of keys, and a control pattern memory for storing a plurality of control patterns of the controller corresponding to the respective user ID information. The controller is typically configured to read out the control pattern stored in the control pattern memory corresponding to the user ID information detected by the user ID information detector and to execute a control of the watercraft based on the read out control pattern.

Abstract: A mounting portion of a water jet pump of a personal watercraft is disclosed. The mounting portion typically includes a tubular pump casing configured to accommodate the impeller, and a pump bracket configured to fasten the pump casing to the body of the watercraft. The pump casing is configured to be mountable to the pump bracket in such a manner that an internal fitting portion of the pump casing is internally fitted to a casing receiving portion of the pump bracket from rearward with a ring-shaped seal element fitted into a groove provided on the pump casing, and an outer peripheral surface of the internal fitting portion and an inner peripheral surface of the casing receiving portion are sealed by the seal element.

Abstract: A steering device of a personal watercraft is disclosed. The steering device typically includes a lower steering column that is mounted to a body of the watercraft and is configured to be rotatable around a rotational axis extending rearward and upward, and an upper steering column that is configured to support a steering handle and is movably coupled to the lower steering column. The upper steering column is movable close to and away from the lower steering column along a straight line extending to be inclined rearward with respect to the rotational axis of the lower steering column.

Abstract: A personal watercraft configured to plane on a water surface is disclosed. The personal watercraft typically includes an attitude sensor configured to detect an attitude of a body of the watercraft, a propulsion force changing system configured to change a propulsion force of the watercraft to control the attitude of the body, and a controller configured to control the propulsion force changing system according to the attitude of the body which is detected by the attitude sensor.

Abstract: A stand-up type personal watercraft is disclosed. The stand-up type personal watercraft typically includes a body including a hull and a deck covering the hull from above and being provided with a foot deck on an upper surface of a rear portion thereof to allow a rider to ride thereon, a handle pole configured to extend rearward in a longitudinal direction of the body, the handle pole having a steering handle attached to a rear end portion thereof, the handle pole being configured to be mounted to the deck such that a front end portion of the handle pole is attached to a front portion of the deck and the handle pole is vertically pivotable around the front end portion thereof, and a display device mounted to the handle pole and configured to display information regarding the watercraft.

Abstract: A main switch apparatus of a small watercraft is provided. The main switch apparatus of a small watercraft having a main switch. The main switch apparatus includes a plurality of keys, each for operating the main switch, each assigned a different user ID information. The main switch apparatus may further include an ID information detector for detecting the user ID information assigned to one of the plurality of keys applied to the main switch, a controller for controlling the small watercraft, configured to be activated by each one of the plurality of keys, and a control pattern memory for storing a plurality of control patterns of the controller corresponding to the respective user ID information. The controller is typically configured to read out the control pattern stored in the control pattern memory corresponding to the user ID information detected by the user ID information detector and to execute a control of the watercraft based on the read out control pattern.

Abstract: A steering device of a small watercraft is disclosed. The device includes a steering column oriented substantially in the vertical direction, wherein the steering column includes an upper component and a lower component, the components being coupled together so as to be movable relative to each other in the longitudinal direction thereof, and a fastening device configured to lock the relative movement of the components. One of the components includes an elongated hole which penetrates in the left-and-right direction and is elongated in the vertical direction. The other component includes a protrusion extended in the left-and-right direction so as to be accommodated in the elongated hole and to be guided by the hole in the vertical direction. The components each include a contact surface having a plurality of teeth arranged in the vertical direction, and engage with each other in the front-and-rear direction by engaging the teeth.

Abstract: A body structure of a water-jet propulsion personal watercraft, comprises a body having an inner space defined by a hull and a deck, an engine mounted within the inner space of the body, a water jet pump placed behind the engine and configured to be driven by the engine, and a bulkhead placed behind the engine and configured to separate the inner space into an engine room on a front side within which the engine is contained, and a closed rear space on a rear side, wherein a first drain hole is provided in the closed rear space of the body so as to communicate with an outside of the watercraft.

Abstract: The present invention provides a watercraft having steering components (steering tabs or stabilizers) for maintaining steering capability even while amount of water ejected from a propulsion pump is decreased. The steering components are movably disposed on a hull of the watercraft at or below the water level on both right and left sides to be in an “Operating State” in which resistance of water is larger or to be in a “Non-operating State” in which the resistance of water is smaller in accordance with steering operation. Furthermore, a mechanism for absorbing an external force acting on the steering components in the “Operating State” is located in a system for operating the steering components. The mechanism reacts to the external force to allow the steering components to be transformed into the “Non-operating State.

Abstract: The present invention provides a watercraft having steering components (steering tabs or stabilizers) for maintaining steering capability even while amount of water ejected from a propulsion pump is decreased. The steering components are movably disposed on a hull of the watercraft at or below the water level on both right and left sides to be in an “Operating State” in which resistance of water is larger or to be in a “Non-operating State” in which the resistance of water is smaller in accordance with steering operation. Furthermore, a mechanism for absorbing an external force acting on the steering components in the “Operating State” is located in a system for operating the steering components. The mechanism reacts to the external force to allow the steering components to be transformed into the “Non-operating State.

Abstract: It is an object of the invention to provide a personal watercraft having a rear deck floor which can house goods necessary for water-skiing or the like and is provided with a space where a water-skier or the like sits when getting into the water or a space for embarkation when coming out of the water into a watercraft. In a personal watercraft having a whole plane view almost shell-shaped comprising a riding seat S provided from an almost central portion of a body A of a watercraft to a rear portion thereof, a steering handlebar 21 provided in front of the riding seat S, an engine E for propulsion provided below the riding seat S, and a jet pump P provided behind the engine, the jet pump being provided with an outlet port rearward for being driven by the engine, a rear deck floor 1 having a space for at least one adult to sit is provided behind the riding seat S and has an openable hatch cover 1A formed on the space, and a rear storage box 1B is formed under the hatch cover 1A.

Abstract: In the storage structure for a personal watercraft, a first hatch cover is installed in front of a handlebar in an openable and closable fashion with respect to a deck and a second hatch cover is installed on the first hatch cover in an openable and closable fashion with respect to the first hatch cover. A first storage area is formed inside the first hatch cover and a second storage area is formed inside the second hatch cover.