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7827687 |
Method of modifying an upper gearset of a marine stern drive
A support for the upper drive shaft of a marine stern drive unit. The support has an axial body installable in the axial bore of the upper case. Retainers on the body are engageable with the upper...
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7665334 |
Outboard motor lower-unit lock
An outboard motor lower-unit lock has a key, a locking pin assembly and a shaft. To install the lock, a user drills a shaft hole the same diameter as the shaft through both sides of a housing unit...
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7435147 |
Breakaway skeg for a marine propulsion device
A marine propulsion device is provided with a breakaway skeg having first and second attachment points. The first and second attachment points are configured to result in the second attachment...
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7431621 |
Drive shaft supporting structure for a small boat, and personal watercraft incorporating same
A drive shaft supporting structure for a small boat is provided which permits simplification of a hull and for which manufacturing productivity is increased. The drive shaft supporting structure...
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7422500 |
Upper gearset support for marine stern drive unit and method of modification
A support for the upper drive shaft of a marine stern drive unit. The support has an axial body installable in the axial bore of the upper case. Retainers on the body are engageable with the upper...
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7413491 |
Marine vessel propulsion structure and marine vessel driving apparatus
In an outboard drive or an inboard-outboard drive, power generated by a single engine is transmitted in left and right directions from a main drive shaft, thereby finally causing left and right...
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7387553 |
Marine drive unit overmolded with a polymer material
A marine propulsion system drive unit is provided with a polymer layer to protect its outer surface from abrasion and corrosion. The polymer layer is injection molded around the outer surface of a...
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7322866 |
Outboard engine
An outboard engine comprises a power source inside a power source compartment. The power source room is formed by an upper cover and an undercover. A buoyant body is disposed outside the power...
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7220157 |
Arrangement and method for parallel alignment of propeller shafts and means for parallel alignment
An arrangement and method for parallel alignment of propeller shafts in a first and a second underwater housing arranged on the hull of a vessel, which underwater housings are arranged to rotate...
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6966806 |
Replaceable leading edge for a marine drive unit
A marine propulsion device is made of first and second portions which are removably attachable to each other. The second portion is the leading edge portion of the nose cone and the drive shaft...
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6840828 |
Expandable retaining ring assembly
A retaining ring assembly and method of assembly is disclosed. A gearcase includes a propeller shaft housing that is retained in the gearcase. The propeller shaft housing is secured against...
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6672917 |
Process for improving an anodizing film, an anodizing film structure and an aluminum-alloy-made outboard engine
A process for forming an improved anodizing film on the surface of an aluminum alloy material. The film is impregnated with an amorphous substance which fills pores formed in the film during its...
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6585546 |
Methods and apparatus for retaining a propshaft support bearing housing in a gear case
The present invention, in one aspect, relates to a propeller shaft housing for being secured in the gear case bore and configured for being securely engaged to the gear case bore by threaded screws...
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6491588 |
Upper case housing support tower for marine stern drive unit
A support for the vertical drive shaft of a marine stem drive unit. The support is a generally tubular member of high quality steel or steel alloy which is threaded at its lower end. The upper end...
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6413129 |
Outboard drive housing cooling system
An outboard motor includes a power head, driveshaft housing and lower unit, and employs a cooling system to cool the driveshaft housing. Portions of the driveshaft housing experience substantial...
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6350166 |
Outboard engine with resonance-avoiding exhaust housing
A propulsion system for a boat has a powerhead or a motor with an exhaust port for exhaust gases. The exhaust gases are exhausted through the propeller hub via an exhaust housing. The exhaust...
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6254443 |
Replaceable tower support for a bearing race and drive shaft in a marine engine
A housing for an outdrive is installed with a replaceable tower support for a ball bearing race through which the drive shaft rotates. When the bearing race becomes worn, rather than replacing the...
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6234855 |
Driveshaft housing for outboard motor
A driveshaft housing for an outboard motor includes an improved construction. The outboard motor comprises a power head containing an engine, the driveshaft housing depending from the power head...
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6234854 |
Marine drive assembly
A boat drive mechanism is constructed of an engine mounted in the boat; a propeller; a drive shaft having a front end connected to the engine and a rear end extending through the exterior of the...
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6190220 |
Protective cover and method for protecting a boat propeller shaft
A protective cover and method for protecting a boat propeller shaft and gears within a lower gear housing of a boat includes a cone-shaped casing having an inner surface, an outer surface, a top,...
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6146223 |
Marine propulsion unit with water inlets in all quadrants of the front portion of its torpedo-shape gearcase
A marine propulsion device is provided with a water inlet system that comprises at least a plurality of frontal inlet openings at the tapered forward end of a gearcase portion of a housing...
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6116973 |
Apparatus and methods for preventing relative side to side motion between a propshaft housing and a gear case
A wedge for preventing relative side to side motion between the propshaft housing and the gear case of an outboard engine is described. The wedge is configured to be located between the propshaft...
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6053783 |
Hub assembly for water jet propulsion unit
Hub assembly for the journalling of an impeller (4) or drive shaft end (3) in the pump housing (2) of a water jet propulsion unit for propulsion of a vessel. The hub assembly forms a separate,...
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6029540 |
Power output system for an outboard engine
A flange portion formed on an inner periphery of a flywheel is facet-fitted to an end of a crankshaft. A spline piece is facet-fitted to an inner peripheral surface of the flywheel. The flange...
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5931711 |
Outboard engine component mounting
An outboard motor incorporating a mounting assembly for resiliently connecting the steering shaft to the driveshaft housing. The mounting assembly also includes locating an attachment bracket on...
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5820425 |
Outboard drive lower unit
A lower unit for an outboard drive has an elongated length in order to present a streamline shape while providing sufficient width to house a transmission for a counter-rotational propeller system...
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5800224 |
Splash and anti-cavitation plate for marine drive
An integrated splash and anti-cavitation plate is provided for an outboard motor. The integrated plate decreases the overall weight of the outboard motor in order to improve the motor's...
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5766046 |
Cooling water pickup for marine propulsion unit
An improved water pickup arrangement for a marine propulsion device for picking up cooling water for the propelling, water-cooled internal combustion engine. The lower unit has a bullet-shaped...
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5713772 |
Cooling arrangement for outboard motor
A number of embodiments of four-cycle internal combustion engines having belt-driven overhead cam shafts. The power head of the outboard motor includes a protective cowling that has an atmospheric...
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5558548 |
Propeller drive for boats
Propulsion unit for marine vessels with a gear or bearing housing (6) in which a propeller shaft (7) with a surface-breaking propeller (8) is carried. In a horizontal plane the propeller shaft...
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5536188 |
Nose cone method and apparatus
A nose cone attachment for an outboard motor propeller gearcase has a molded polymer housing shaped to fit over the front and sides of an outboard propeller gearcase and has an aerodynamic...
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5505642 |
Nautical propulsion performance enhancer
A nautical propulsion performance enhancer for a propeller of a marine propeller type propulsion system, comprising a facility for twisting and directing a flow of water into the propeller, in such...
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5376031 |
Marine drive with surfacing torpedo
A marine drive (10) has two counter-rotating surface operating propellers (12 and 14). The lower horizontal torpedo portion (188) of the housing (20) has an upper zone (276) with outer surface...
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5344350 |
Compact outboard marine drive
An outboard marine drive (10) has a powerhead (20) including an internal combustion engine (22), an adaptor plate (24) mounted to the engine, and a lower gearcase (26) including a torpedo housing...
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5340345 |
Water pickup and cooling apparatus for boat drive systems
An apparatus for cooling a stern mounted drive on a boat, comprising a water pickup for gathering water from the body of water in which the boat is operating, and a spray nozzle that directs a...
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5336119 |
Drive unit for relatively small watercraft
A drive unit for a relatively small watercraft has a cylindrical underwater partial housing which carries, at one end, an electric motor to be operated photovoltaically, with which a propeller is...
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5277634 |
Lower unit torpedo configuration
Disclosed herein is a lower unit for a marine propulsion device, such as an outboard motor or a stern drive unit, which lower unit comprising a gear case including a torpedo having a fore and aft...
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5277632 |
Boat motor replacement skeg
An outboard motor replacement skeg which is thin and flat and has a cavity formed in one of its edges is disclosed. The replacement skeg is slid over the stub which remains after the original skeg...
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5261842 |
Outboard motor retrofit generator apparatus
A retrofit generator housing is arranged for mounting to an outboard drive housing to regenerate electrical energy into a battery of the associated outboard motor, with the generator housing...
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5234362 |
Outboard motor with improved housing interface
A marine propulsion device comprising an upper housing which has a lower surface and which is adapted to be mounted on the transom of a boat for pivotal movement relative thereto, a lower housing...
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5171177 |
Integrally formed driveshaft housing structure for interposition between the powerhead and lower unit of a marine propulsion system
A driveshaft housing structure adapted for interposition between the powerhead and the gearcase of an outboard marine propulsion system. The driveshaft housing structure is integrally formed, and...
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5094639 |
Propeller driving device of marine propulsion unit
An outboard motor lower unit construction including a bearing carrier that supports the propeller shaft and which extends into a cavity formed in the lower unit. The bearing carrier is held by a...
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5078630 |
Engine cooling system induction arrangement for marine inboard-outboard and outboard engines
A marine outboard engine has a section of its cooling water suction passage defined by an annular groove formed in the periphery of a bearing housing which accommodates the bearing of the propeller...
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5011583 |
Corrosion prevention for a marine propulsion system
A marine propulsion system of the type having a sacrificial anode for corrosion protection of the casing includes structure whereby the propeller is electrically insulated from the casing and the...
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5000709 |
Universal nose cone and method for profiling same
A universal nose cone which has a cavity with height, width and depth dimensions to accommodate a plurality of different water craft drive lower housings so that once the nose cone has been...
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4986775 |
Propeller shaft bidirectional thrust bearing system
A bidirectional thrust bearing system for the propeller shaft of a marine propulsion system includes a substantially circumferential groove milled into the propeller shaft. A pair of substantially...
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4954109 |
Water pickup insert
A cooling water pickup system is provided for a marine stern drive. The stern drive includes an outdrive housing having a cooling water passage defined therein with first and second cooling water...
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4948384 |
Marine propulsion device anode arrangement
A marine propulsion device comprising a gear housing adapted to be mounted on the transom of a boat, a bearing housing supported by the gear housing, a bearing mechanism supported by the bearing...
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4944702 |
Housing rudder for electric trolling motor
A device is provided for attachment to the submerged portion of an electric trolling motor to serve as a rudder and to further provide quieter operation and resistance to fouling by aquatic...
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4917639 |
Device for supporting drive shaft of marine propulsion unit
A device for supporting the drive shaft of a marine propulsion unit wherein a single thrust bearing that supports the drive shaft against its thrust loads is biased by means of an elastic...
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