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5997373 |
Jet-propelled boat
The expected performance of a jet-propelled boat is maintained, exhaust control valves are controlled and driven in an improved accuracy on the basis of the traveling speed of the jet-propelled...
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5983631 |
Exhaust control for watercraft engine
An exhaust control for an internal combustion engine powering a watercraft is disclosed. The exhaust control includes an exhaust manifold connected to the engine and having a passage therethrough...
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5980343 |
Exhaust system for marine vessels
A two pathway exhaust and water discharge through-hull system is coupled to a muffler for separating exhaust gases and cooling water at operating speeds such that at low engine speeds exhaust gases...
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5980344 |
Marine engine exhaust processing system
An exhaust system for an internal combustion engine in a boat with exhaust manifold of the engine connected to an exhaust chamber. Within the exhaust chamber is a vacuum wedge having a top plate...
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5975033 |
Water-cooled engine
Each of combustion chambers 37 in a cylinder head 8 and an opening 45 in a cylinder block/cylinder head coupling surface 36 are connected to each other by a pair of exhaust passages 42. A cooling...
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5967862 |
Engine control for planing boat
An engine control for a planing-type boat having an engine powering a water propulsion unit is disclosed. The engine has an exhaust port leading from a combustion chamber for routing exhaust...
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5967866 |
Texture gearcase for a marine propulsion system
A lower unit for a marine propulsion system has a flow disrupter positioned along the side wall of the vertical strut above the torpedo gearcase. The strut has a high pressure side and low pressure...
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5954555 |
Oil supply system for personal watercraft
An oil supply system for a watercraft is disclosed. The watercraft has a water propulsion device and a hull defining an engine compartment, an internal combustion engine positioned in the engine...
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5954554 |
Outboard drive exhaust system
An outboard drive involves an improved exhaust system that increases the reverse thrust produced by the outboard drive. The exhaust system includes a first exhaust passage and a second exhaust...
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5954553 |
Watercraft with catalytic exhaust system
A personal watercraft includes a catalytic exhaust system in order to reduce discharge of pollutants. A catalyzer of the exhaust system is located within an expansion chamber. The expansion...
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5954022 |
Oil pan mounting arrangement for four cycle outboard motor
A four cycle outboard motors that have water cooled engines and an oil pan that is formed in the upper portion of the drive shaft housing. An exhaust pipe collects exhaust gases from an exhaust...
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5941743 |
Engine control
An engine control for an internal combustion engine powering a water propulsion device of an outboard motor propelling a watercraft is disclosed. The engine control changes one or more combustion...
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5937801 |
Oil temperature moderator for an internal combustion engine
A cooling system is provided for an outboard motor or other marine propulsion system which causes cooling water to flow in intimate thermal communication with the oil pan of the engine by providing...
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5934960 |
Outboard motor exhaust system
A number of embodiments of four cycle outboard motors that have water cooled engines and an oil pan that is formed in the upper portion of the drive shaft housing. An exhaust pipe collects exhaust...
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5934959 |
Marine muffler
A muffler comprises a housing having an exhaust inlet and an exhaust outlet. A first exhaust chamber is disposed concentrically within the housing and is connected with the exhaust inlet. The first...
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5931712 |
Exhaust probe arrangement for small watercraft engine
An improved exhaust probe arrangement within an exhaust system of a small watercraft increases the accuracy of the probe's readings. The aperture is located upstream of a point where cooling water...
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5928044 |
Exhaust system for an engine
An exhaust system is provided for an engine of the type used to power a watercraft. The engine has at least one combustion chamber with an exhaust passage leading therefrom. A crankshaft of the...
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5921829 |
Outboard motor cooling system
A cooling system for an outboard motor propelling a watercraft and powered by an engine, is disclosed. The cooling system includes a first cooling system comprising a coolant flow path through the...
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5916135 |
Engine exhaust emission control system in outboard engine system
An exhaust gas emission control system for a 4-cycle outboard engine is disclosed. The engine comprises a mounting member; an engine block mounted on the mounting member; an extension housing...
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5916003 |
Propeller vent plug with fluid passage
A propeller device is provided with vent apertures and plugs which fit into the vent apertures to be retained in position during use of the propeller device. The vent plugs are provided with...
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5911610 |
Outboard motor exhaust system
A catalytic exhaust system for an outboard motor having an engine positioned in a cowling thereof is disclosed. The exhaust system leads from an exhaust port of the engine to a discharge from the...
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5911609 |
Watercraft exhaust system
An arrangement of an exhaust gas collection port within an exhaust system of a small watercraft increases the accuracy of an associated probe's readings. The port is located upstream of a point...
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5911608 |
Exhaust system for outboard motors
A number of embodiments of an exhaust system for outboard motors that includes a trap portion in a conduit which conveys the exhaust gases from an expansion chamber formed in the drive shaft...
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5908338 |
Exhaust system for outboard motor
This invention is an outboard motor exhaust device compatible with a small, lightweight cylinder block, which simplifies the exhaust manifold assembly and allows greater precision of assembly. The...
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5904605 |
Cooling apparatus for outboard motor
A cooling apparatus for an outboard motor which is provided with a water-cooled engine in a vertical alignment in which a crank shaft is vertically disposed, the engine being composed of a cylinder...
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5893783 |
Outboard motor exhaust system
An exhaust system for an outboard motor powered by an internal combustion engine is disclosed. Preferably, the engine is of the "V"-type, having first and second banks defined by first and second...
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5885122 |
Watercraft exhaust control system
An engine having an engine control for reducing the passage of unburned fuel and other components into the exhaust system for preventing the fouling of an exhaust catalyst, is provided. As the...
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5885121 |
Cooling system for watercraft engine
In accordance with the present invention there is provided a cooling system for a four-cycle engine utilized to power a water propulsion device of a watercraft of the type including a propulsion...
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5882236 |
Exhaust system for small watercraft
A small watercraft includes an improved exhaust system that reduces the width of the engine and associated exhaust pipes. The watercraft includes a hull having a length in a longitudinal direction,...
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5881555 |
Exhaust pressure pulsation control apparatus for marine propulsion system
An improved exhaust pressure pulsation control apparatus for a marine propulsion system has a front ring, a reflector disk located downstream of the front ring, and a plurality of connecting...
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5879211 |
Watercraft component layout
A personal watercraft includes a component arrangement which reduces heat exposure to many critical, heat-sensitive components of the watercraft. The personal watercraft includes a calalyzer within...
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5868093 |
Amphibious vehicle
An improved amphibious vehicle comprising a confined housing of a vehicle is provided. The confined housing is provided with a central connecting chamber under a cabinet adjacent to the central...
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5863231 |
Underwater exhaust system for marine engine
An underwater exhaust system for a water-cooled marine engine installed in a boat whose hull is molded of fiber-reinforced resin. The system is adapted to exhaust underwater the gases and cooling...
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5857880 |
Through-the-hub-propulsion unit exhaust
An exhaust system for an outboard motor discharges exhaust gases in front of the propeller for improved acceleration. The discharge of exhaust gases upstream of the propeller produces a cavitation...
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5855495 |
Exhaust gas cleaning device of outboard motor unit
An exhaust gas cleaning device is provided for an outboard motor unit having an engine provided with a pair of cylinder rows arranged so as to provide a V-shape and a crank shaft arranged...
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5853308 |
Engine and exhaust system for watercraft
Two embodiments of two-cycle V-type crankcase compression internal combustion engines for powering a jet propelled watercraft. In each embodiment, the pistons of the cylinder banks each drive their...
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5846107 |
Marine engine noise suppressor
An exhaust system in a boat for an internal combustion engine in the boat with the conventional round exhaust manifold of the engine connected by a rectangular cross sectional exhaust pipe to an...
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5827096 |
Watercraft exhaust control
An exhaust control for an internal combustion engine powering a watercraft is disclosed. The exhaust control includes a valve which is movably mounted with respect to the engine and having a...
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5822985 |
Exhaust passage structure of outboard motor unit
An exhaust passage structure is provided for an outboard motor unit having an engine holder mounted to a hull through a bracket, an engine disposed to an upper portion of the engine holder, a drive...
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5823835 |
Outboard motor throttle control
In accordance with the present invention there is provided an outboard motor for use in powering a watercraft of the type having an operator station positioned along a starboard side of the...
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5820426 |
Exhaust system for personal watercraft
An exhaust system for a personal watercraft provides an exhaust adapter plate and an exhaust header pipe that allows exhaust to exit from the rear of a horizontally mounted internal combustion...
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5816869 |
Propeller for varying the exhaust length
A propeller for a marine propulsion system that provides variable length exhaust paths depending upon the speed of the boat and motor. The propeller includes a propeller hub and an exhaust tube...
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5803036 |
Engine for outboard motor
An outboard motor having an upper unit containing an internal combustion engine and a lower unit containing an exhaust guide is disclosed. The engine has a vertically oriented crankshaft having an...
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5795200 |
Contra-rotating rotor unit
A marine propulsion unit has two contra-rotating propellers (15, 16) driven by a single shaft (25) through gearing which includes a set of static planetary gears (40), an external gear (30), and an...
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5791952 |
Apparatus for directing boat exhaust fumes
A method and apparatus for preventing exhaust fumes from entering the deck area of a motor boat having an engine of the type which has an exhaust port that expels fumes at the rear end of the boat...
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5791953 |
Shutter valve for a marine engine
A shutter valve construction for the exhaust system of a marine engine that discharges exhaust underwater. The valve construction includes an adaptor having an annular body that is adapted to be...
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5766048 |
Exhaust system for outboard drive
An exhaust system for an marine drive discharges exhaust gases between front and rear propellers of a counter-rotating propeller system. The discharge of exhaust gases between the propellers...
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5752867 |
Small watercraft seat
A small watercraft includes a hull with a deck portion. A longitudinally extending raised pedestal of the deck portion has an upper surface with a front portion and a rear portion. An engine...
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5746054 |
Method and apparatus for tuned pipe water injection
In an exhaust expansion chamber or tuned pipe of a two-cycle engine in a watercraft, variable amounts of water are injected, thus cooling the temperature within the expansion chamber and matching...
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5746630 |
Combination wet marine exhaust muffler and water separator
A combined wet marine exhaust muffler and water separator comprises a housing having a tangential inlet for inducing the exhaust flow to rotate about a lengthwise axis of the housing, a first...
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