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JP4060161B2 |
A method and apparatus of controlling an engine at the time of first combustion during start-up in which an increase in an engine speed can be regulated, and thus noises and vibrations of the engine are reduced, and a personal watercraft...
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JP4057263B2 |
To provide a jet propulsion boat in which cooling water is prevented from flowing into the footrest deck or from splashing toward the footrest deck and wherein the occupant can easily recognize the cooling water. A jet propulsion boat in...
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JP4057412B2 |
A water-jet personal watercraft comprises a body including a hull and a deck covering the hull from above, the body being configured to form an engine room inside thereof in which an engine is mounted, and the deck being provided with a ...
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JP4054946B2 |
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JP4057262B2 |
A rear grip structure for a small boat capable of discharging water which has entered the boat from between the hull side and the seat. The rear grip structure for a small boat has a structure in which an outer frame is formed into a hol...
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JP2008044598A |
To provide an energy-saving marine vessel by reducing the center of gravity, providing a restoring force and stability, and enhancing buoyancy.In the structure of a marine vessel, a sloped water column tube 11 is passed through a hull, a...
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JP4046182B2 |
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 conf...
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JP4044840B2 |
In an apparatus and method for ejecting an additive for significantly reducing the drag of a first fluid moving relative to a wall, a drag-reducing substance is conditioned by causing a second fluid, which includes the drag-reducing subs...
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JP2008018927A |
To provide a watercraft propulsion system of high efficiency in a turbine-type power-driven vessel, in which rotation of an active runner is improved to achieve high efficiency by forming a recess for housing the active runner in a shell...
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JP4039825B2 |
A heat exchanger is interposed between a supercharger of an internal combustion engine and an intake port of the internal combustion engine. The plate partially closes a space between an outer periphery of heat exchanger fins housed in a...
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JP4038259B2 |
To easily and appropriately regulate the throttle opening even by a beginner. A throttle lever 4 is provided close to the grip part 2 of the steering wheel of a propulsion craft, regulating means 5, 6 to regulate the operation range of t...
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JP4021636B2 |
To reduce a lateral slippage amount of a jet propelled boat by delaying the start timing of an engine speed control and performing the engine speed control after the boat is sunk in the water. Provided is a delay time Td delaying the sta...
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JP4017890B2 |
Disclosed is a small watercraft having an engine cooling system which can lessen a temperature distribution of an engine. The small watercraft comprises an engine for driving a propulsion unit of the watercraft, and the engine includes a...
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JP2007308126A |
To solve the problem of causing movement of marine organism or environmental destruction in a related art, in which since performance of a propulsion power screw of a ship is affected by float and sink of a hull, a ballast tank is instal...
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JP4014978B2 |
A lever-support bracket apparatus for a small waterboat allows a lever-support bracket and a socket section to be increased in strength and rigidity, by combining these functions in a single unitary apparatus. Using the described apparat...
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JP4010781B2 |
An oil tank system for an engine capable of reducing the overall height of an engine is disclosed. Breather chambers of a dry sump type engine in which an oil tank for storing engine oil is provided independently from the engine are defi...
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JP4008681B2 |
To provide an article storage structure for a small boat having a reduced number of components and being able to be assembled without much time and effort. The article storage structure for a small boat is constructed in such a manner th...
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JP4005493B2 |
To improve an operating property of a trim operation device of a small surface boat to swing a direction of a nozzle to jet jet water upward or downward. A trim operation lever 12 of the trim operation device of the small surface boat is...
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JP4005324B2 |
In a small boat equipped with a display panel (liquid crystal device) displaying operation information and a change-over switch (set switch) capable of switching from a normal operation in which output of an engine is not limited to a li...
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JP4003900B2 |
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JP4004249B2 |
To provide an output shaft structure of a personal watercraft, which is capable of enhancing the durability of the engine. An engine is mounted on a watercraft body with a crankshaft extending in the longitudinal direction of the watercr...
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JP3995572B2 |
A conduit-supporting structure for a small watercraft allows the number of conduit guide components to be reduced, and the required number of processes in piping and wiring to be reduced during assembly. A vessel body includes a hull 14,...
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JP3992458B2 |
An engine mount structure for a personal watercraft allows the engine to be incorporated in an inclined well-balanced state in the watercraft body having a hull and a deck, while making efficient use of the space within the body. The eng...
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JP3992429B2 |
The present invention permits the positioning and support of a fuel tank in a stable state while preventing unnecessary stresses from being generated in the fuel tank. A tapered, single projecting portion for positioning is formed on eit...
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JP3990558B2 |
A piping joint includes a male member or joint fastened to a female member or socket by locking pawls of a retainer sleeve onto pawl engaging portions. By pressing a flange by the tip ends of the pawls, the male member (joint) can be dis...
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JP3992196B2 |
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 ...
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JP3992948B2 |
To provide an exhaust structure for a jet propulsion watercraft which can simply achieve a reduction of the exhaust noise. In the exhaust structure for a jet propulsion watercraft, a water jet propeller is provided in a pump room of a wa...
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JP3989258B2 |
To provide a cooling system for a jet propulsion boat in which the number of components are reduced and the construction is simplified. A cooling system for a jet propulsion boat is a system in which a jet propulsion unit is provided at ...
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JP3986276B2 |
To provide a cooling system for a jet propulsion boat in which the quantity of washing water consumed can be reduced and the appearance is improved. The cooling system for a jet propulsion boat forces the engine to be cooled and forces t...
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JP3984467B2 |
To improve turning performance of a boat when the boat is planing while an engine is in a stopped state or an idling state. When the boat 4 is planing while the engine 6 is in a stopped state or an idling state and a driver turns his/her...
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JP3980445B2 |
A small watercraft including an engine mounted in a body such that an axial direction of a crankshaft corresponds with a longitudinal direction of the body, an oil tank provided such that a longitudinal direction thereof corresponds with...
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JP3983153B2 |
An air intake structure for a small watercraft is provided, in which the air intake efficiency is improved. A watercraft body 11 includes a hull and a deck for covering on top of the hull. An engine 20 is disposed in the watercraft body ...
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JP3980362B2 |
To provide a small gliding ship having an excellent appearance design, providing an excellent riding comfortableness to passengers, and approachable to parts requiring maintenance. In this riding type small gliding ship, water pressurize...
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JP3976530B2 |
To enable a thrust force acting on an impeller shaft to be received by a sufficiently large bearing member. A water jet propulsion apparatus is provided with a stator forming a channel. An impeller is rotatably disposed in the stator. An...
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JP3976582B2 |
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JP3979242B2 |
To provide a water planing boat of which exhaust system is light weight and compact even if a four-cycle engine is used. In the water planing boat, a multicylinder four-cycle engine 6 and a jet pump 8 are mounted to a hull 14, the exhaus...
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JP2007230379A |
To prevent leakage of working oil even when a flexible hose to supply and discharge the working oil to and from a hydraulic cylinder to control a water jet propulsion device is ruptured. This water jet propulsion device to supply and dis...
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JP2007230381A |
To prevent breakage of an impeller shaft by wetting all peripheries and all surfaces of a normal seal ring by supplying cooling water even when an impeller shaft of a water jet propulsion device has a non-submerged part in detaining a ve...
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JP3974413B2 |
To provide a small planing boat capable of easily keeping a throttle valve at the intermediate opening without deteriorating an operator's sense of driving, and prohibiting the throttle valve from opening to the maximum opening. The smal...
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JP3974361B2 |
To provide a jet propulsion boat which can be efficiently propelled by disposing a steering nozzle closer to the bottom of the boat. A jet propulsion boat includes a jet propulsion apparatus driven by an engine at the stern. A jet nozzle...
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JP3973987B2 |
An exhaust pipe collecting structure for a multi-cylinder engine unit having multiple cylinders including a first exhaust pipe group and a second exhaust pipe group, each of which has two exhaust pipes selected from four exhaust pipes re...
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JP3974362B2 |
A jet-propelled watercraft capable of eliminating the need for having an operating cable connected to a reverse bucket positioned in a space over a jet propulsion unit. The jet-propelled watercraft configured such that an intermediate le...
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JP3974360B2 |
To provide a steering nozzle angle adjusting mechanism for a jet propulsion watercraft in which an adjustment of the angle of a steering nozzle can be easily carried out without much labor. A steering nozzle angle adjusting mechanism inc...
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JP3974367B2 |
To maintain turning performance by moving a throttle lever in an idle-up direction only when the throttle lever is released during cruising and operation of a steering handle exceeds a normal operation steering angle. The normal steering...
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JP3971161B2 |
To easily land at the shore by reversely injecting a jet. When reverse buckets 22 (L, R) are oscillated to a blocking position Q by the operation of an operating lever 28, a lid member 24 is closed by link mechanisms 33-37, and the oscil...
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JP3971155B2 |
To enhance a coast-landing property by reverse-injecting an injection flow. When reverse injection nozzles 53 (L, R) are closed by a lid member (outer wall 53C) always urged by a spring 66 and a reverse bucket 46 is moved to a shielding ...
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JP3967100B2 |
To ensure an amount of jet water stream and improve the steering property of a jet propulsion boat by introducing a controller capable of increasing the revolution of an engine up to the revolution determined in advance irrespective of t...
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JP3963680B2 |
To sufficiently reduce a rotating component of a stream right near an outer circumferential face of a bearing cap 34, miniaturize the cap 34, and eliminate the need for positioning the cap 34 and a stator blade 31c1. The water jet propel...
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JP3961917B2 |
To provide a cover structure for a shaft coupling in a small surface craft which can be easily dismounted and remounted even in a narrow work space. An engine 17 is disposed at a center of a hull, a water jet propeller 18 is disposed at ...
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JP3961080B2 |
To arrange a balancer shaft in relation to a crankshaft so as to meet the requirement in an engine to be used. In an engine 4, a cylinder 43 is provided in an inclined condition in the stern direction, an exhaust pipe 44 is led upward of...
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