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7607958 Marine engine  
A boat has a hull, a deck having a deck floor, and an engine disposed in the hull. A top of the engine is disposed vertically below the deck floor. The engine includes a crankcase, a crankshaft, a...
7556548 Exhaust device for outboard motor  
An exhaust device for an outboard motor includes an engine having a plurality of cylinders, a first expansion chamber case for collecting exhaust from a first part of the plurality of cylinders and...
7552586 Marine exhaust system with a downstream oxygen sensor located away from a water reversion liquid trajectory path  
A marine engine exhaust system has an oxygen sensor located within a catalyst housing structure and downstream from a catalyst device. The oxygen sensor is located away from a reversion liquid...
7476136 Exhaust valve for two-stroke engine  
A two-stroke internal combustion engine has two cylinders each having an exhaust port. Two exhaust conduits are connected to the two exhaust ports. A passage is provided between the two conduits to...
7453691 Mounting apparatus for data storage devices  
A mounting apparatus for mounting a data storage device that has a protrusion protruding from a sidewall thereof includes a mounting board, and a bracket. The mounting board includes a depressed...
7438615 Outboard drive for boats  
Outboard drive for boats, including a gear housing, an underwater housing connected rotatably to the gear housing, and a mounting element arranged between the gear housing and the underwater...
7404748 Exhaust system  
An exhaust system is disclosed that has pipes and a housing, through which exhaust fumes of an internal combustion engine flow. The exhaust fumes generate a condensate, at least in part and/or in...
7390232 Exhaust system for a marine engine  
An exhaust system for a marine propulsion system includes first through fifth exhaust conduit members, including a pair of serially connected marine exhaust elbows laterally spanning the engine.
7387555 Apparatus and method for boat engine exhaust injection system  
An apparatus and method for injecting a boat engine's exhaust gasses into the boat propeller's propwash, aft of the propeller. The apparatus comprises piping which injects the boat engine's exhaust...
7361282 Separator of floating components  
A buoyant component separator is disclosed for removing at least some floating contaminants from fluids. The component separator may be used with a marine engine exhaust system to reduce...
7343906 Water jet propulsion boat  
A watercraft can include an engine having a crankshaft with its output end extending rearward of a crankcase and a supercharger for compressing air feeding it to the engine. The supercharger can be...
7314397 Standby generator  
An exhaust system for an engine that produces an exhaust gas during operation. The exhaust system includes a manifold in fluid communication with the engine to receive the exhaust gas and a conduit...
7306500 Device for redirecting boat motor exhaust  
The present invention is a device which redirects motor exhaust fumes a distance away from a boat. This device can be applied to a boat's propulsion motor or to its generator for purposes of...
7294030 Outboard motor having seal structure for exhaust release pipe  
An outboard motor includes an elastic seal lid attached to an under cover to form a hermetic seal between the under cover and an exhaust release pipe while closing an opening of the under cover...
7258710 Maritime emissions control system  
An Advanced Maritime Emissions Control System (AMECS) includes several Exhaust Intake Bonnets (EIBs) of different size and/or shape, an Emissions Capture System (ECS), and an Advanced Maritime...
7255617 Personal watercraft incorporating capsize-recovery facilitating structure, and method of using same  
A personal watercraft can be rotated in a correct direction of rotation when the personal watercraft has been overturned, and can thereby be restored to a normal, upright position. The personal...
7247067 Intake manifold for small watercraft  
A watercraft has an engine that has an intake system, an exhaust system, and a cooling system. An intake manifold is positioned above a cooled exhaust pipe. This position of the intake manifold...
7223139 Outboard motor with plastic oil pan  
An outboard motor incorporates an engine. An exhaust conduit is disposed below the engine. The exhaust conduit forms a first exhaust passage to discharge exhaust gases from the engine. A plastic...
7222595 Internal combustion engine for vehicle  
A valve system of an internal combustion engine mounted on a vehicle comprises a valve characteristic varying mechanism for controlling valve operation characteristics of an engine valve, and an...
7186157 Turning propeller drive for a boat  
A rotatable propeller drive ( 1 ) for a boat, where the propeller drive ( 1 ) includes an upper fixing plate ( 4 ) adapted for rotationally fixed attachment to the hull bottom ( 2 ) of the boat. A...
7168999 Exhaust gate valve apparatus for a personal watercraft  
An exhaust gate valve apparatus of a water jet propulsion-driven watercraft is provided that is capable of positively closing an exhaust port with a valve body when an engine is stationary and...
7121906 Method and apparatus for decreasing marine vessel power plant exhaust temperature  
According to the present invention, a method and apparatus for generating power aboard a marine vessel is provided. The method comprises the steps of: (a) providing a Rankine Cycle device that...
7074097 Marine exhaust system with an exhaust flow directing device  
An exhaust system for a marine engine provides a flow directing component that reacts to changes in engine speed to select an appropriate and advantageous direction of fluid flow through the flow...
7056174 Drainage structure of exhaust resonator  
The invention is directed at increasing the degree of freedom in layout of the resonator, and the exhaust system including the resonator will be improved. Also, the invention is directed at a...
7056091 Propeller hub assembly having overlap zone with optional removable exhaust ring and sized ventilation plugs  
A propeller hub assembly having a through-hub exhaust propeller hub characterized by an interior overlap zone defined by the composite interior dimensions of a selected number of conventional...
7052343 Personal watercraft  
A personal watercraft is disclosed. The personal watercraft typically includes a body formed by a hull and a deck covering the hull from above and having an inner space defined by the hull and the...
7029347 Water preclusion device for marine engine  
A water preclusion device for a watercraft with an internal combustion engine for inhibiting the intrusion of water upstream into an exhaust system. The water preclusion device includes a valve...
7018255 Exhaust system for a marine propulsion device having two stationary tubes to define an annular exhaust passage  
A marine propulsion system is provided with inner and outer bellows, or tubes, which are rigidly attached to both the transom bracket and the driveshaft housing of the sterndrive system. Neither...
7004805 Directable exhaust for water sport tow boat  
The directable exhaust for a wake surfing power boat permits directing exhaust out of either the port or starboard side of a boat opposite the wake wave on which a wake surfer is surfing to avoid...
6994604 Method for inhibiting water ingestion in a four cycle marine engine  
A method is provided for avoiding water ingestion through an exhaust system into the cylinders of an engine during an engine shutdown procedure. Air is allowed to flow into the air intake conduit,...
6983713 Powered watercraft  
A watercraft with a propulsion engine includes at least one hull having an underside. A dual exhaust system includes a first exhaust conduit defining a first exhaust flow path leading to the...
6966284 Outboard motor  
There is provided an outboard motor ( 1 ), comprising: an intake valve ( 17 ) and an exhaust valve ( 18 ) provided to a cylinder head ( 14 ); a camshaft ( 20 ) arranged substantially vertically in...
6913499 Exhaust passage of small watercraft, method of connecting exhaust pipe, and water muffler  
An exhaust passage configured to discharge an exhaust gas from an engine of a small watercraft, comprises at least a first exhaust pipe, a second exhaust pipe connected to the first exhaust pipe,...
6910930 Exhaust diverter nozzle  
An exhaust diverter nozzle used in seawater cooling of the exhaust of marine engines, particularly diesel, without added back pressure the nozzle diverts the seawater in the exhaust at low engine...
6884133 Catalyzer arrangement for outboard motor  
An outboard motor includes an engine that defines a first exhaust passage section. A housing unit is mounted on an associated watercraft and defines a second exhaust passage section. A support...
6881110 High-speed vessel powered by at least one water jet propulsion system without exhaust gas trail  
A propulsion system for a large watercraft, e.g., for a high-speed, military surface craft, includes at least one water jet propulsion device (water jet) beneath the vessel. An operating method of...
6855021 Multiple valve engine for watercraft  
A multiple valve engine for a watercraft includes an improved construction that contributes in balancing the weight of the engine between the port and starboard sides of the watercraft hull. The...
6851257 Exhaust gas passage structure of outboard engine  
A split face of an exhaust passage-defining member is coupled to a split face provided at a rear portion of an oil case interposed between an engine block and an extension case. A main exhaust gas...
6840038 Exhaust system for outboard motor  
An exhaust system for an internal combustion engine of an outboard motor is provided. The exhaust system provides dual exhaust passages, simplifying the engine's construction and reducing...
6808433 Exhaust system located on one side of the hull of a personal watercraft  
An exhaust system for a personal watercraft that places components of the exhaust vehicle on one side of the watercraft, so that the exhaust system takes less space in the watercraft.
6800005 Exhaust system for a small watercraft  
An exhaust system for a small watercraft wherein exhaust gas can flow smoothly includes a water muffler in the exhaust system for an engine incorporated in a small watercraft. An exhaust pipe is...
6783413 Exhaust system for outboard motor  
An exhaust system for an outboard motor includes an internal combustion engine. An intermediate member supports the engine. A housing unit depends from the intermediate member. An exhaust system...
6755705 Water drain conduit between exhaust pipe and expansion chamber for a watercraft  
An exhaust system for a personal watercraft that includes a water drain conduit coupling the exhaust pipe to the expansion chamber. The water drain conduit is located at the lowest point of the...
6746290 Idle exhaust system for outboard motor  
An outboard motor includes a housing unit and an engine disposed above the housing unit. The engine defines a first exhaust passage to discharge exhaust gases from the engine and a lubricant...
6726513 Jet-propulsion personal watercraft  
Disclosed is a jet-propulsion personal watercraft capable of easily removing and mounting an engine and easily performing maintenance of the engine mounted in a body of the watercraft. In an engine...
6722934 Marine jet drive with through-the-nozzle exhausting  
A marine jet drive having through-the-nozzle engine exhaust, thereby to avoid or minimize noxious odors, noise and heat problems. A method for improving marine jet drive engine performance,...
6688929 Personal watercraft having an improved exhaust system  
A personal watercraft with an exhaust system including a first and second mufflers each disposed in opposite sides of the hull. A manifold pipe communicates the engine with the first muffler. A...
6672919 Temperature control system for marine exhaust  
Temperature control system for marine engine exhaust system. The control system lowers flow of cooling water to water jacket and exhaust gas conduit of the exhaust system at low engine speeds. The...
6672240 Deck boat  
Combined herein are the benefits of a flat deck pontoon boat and the speed and versatility of a jet propelled watercraft. The watercraft is equipped with a propulsion source sufficient to move the...
6663451 Siphon pump for a marine propulsion device  
A fluid draining device for an outboard motor is provided with a conduit through which exhaust gases are directed. The flow of exhaust gas through the conduit induces a lowered pressure in a...