Abstract: Disclosed herein is a cylinder head comprising a one-piece casting including a cylinder block mounting surface adapted to mate with a mounting surface on a cylinder block and including vertically spaced first and second recesses adapted to respectively form portions of first and second combustion chambers and respectively including first and second exhaust ports, a bottom surface extending transversely to the cylinder block mounting surface and including an exhaust gas outlet, and an internal exhaust gas passage extending between the exhaust ports and the exhaust gas outlet.

Abstract: Disclosed herein is an outboard motor comprising a cylinder block including a lower horizontal drive shaft housing mounting surface, and a cylinder head mounting surface extending upwardly from the drive shaft housing mounting surface, a drive shaft housing including a peripheral outer surface including an upper end, a cylinder block mounting surface at the upper end, and a portion extending rearwardly from the cylinder block mounting surface and having therein a vertically open bore located forwardly of the outer surface, and a cylinder head comprising a cylinder block mounting surface fixed to the cylinder head mounting surface and including vertically spaced first and second recesses adapted to respectively form portions of first and second combustion chambers and respectively including first and second exhaust ports, a bottom surface extending transversely rearwardly from the cylinder block mounting surface of the cylinder head, a projection extending downwardly from the bottom surface and into the bore,

Abstract: A marine propulsion device including a lower unit, a propeller shaft rotatably supported by the lower unit and to support a propeller, the shaft including a longitudinal axis and a surface defining a plane which is substantially normal to the axis, and a thrust washer for transmitting thrusting force from the propeller to the surface.

Abstract: A marine propulsion device comprising a lower gearcase, a bearing housing which is supported by the lower gearcase and which includes an exterior surface having therein an annular groove, a propeller shaft rotatably supported by the bearing housing and adapted to have mounted thereon a propeller, and a retaining member which is supported by the lower gearcase and which extends into the groove.

Abstract: A marine propulsion device comprising a housing adapted to be mounted on the transom of a boat, a first gear rotatably supported by the housing and adapted to be drivingly connected to a propeller, a pump, and a second gear which is driven by the first gear and which is drivingly connected solely to the pump.

Abstract: A marine propulsion device comprising a gear housing adapted to be mounted on the transom of a boat, a clutch assembly including a clutch housing, a shaft rotatably supported within the clutch housing and adapted to be drivingly connected to a propeller, opposed bevel gears coaxially supported within the clutch housing for rotation relative to the shaft, and a clutch mechanism located between the bevel gears for causing selective and alternative driving engagement of the bevel gears and the shaft, and a mechanism for affording insertion of the clutch assembly as a unit into the gear housing and for affording removal of the clutch assembly as a unit from the gear housing.

Abstract: A marine propulsion device comprising a gear housing adapted to be mounted on a transom of a boat, a first gear rotatably supported by the gear housing and adapted to be driven by an engine, a second gear which is rotatably supported by the gear housing, which is driven by the first gear and which is adapted to be drivingly connected to a propeller, a third gear driven by the second gear, and an arrangement for lubricating the third gear.

Abstract: A marine propulsion device comprising a member adapted to be mounted on the transom of a boat, a housing which is mounted on the member for pivotal movement relative thereto and which has therein a first bore, an extendable and contractable hydraulic assembly having a first end connected to the member and having a second end having therein a second bore, a shaft extending through the first and second bores, a bushing surrounding the shaft in the first and second bores, and an elastomeric member surrounding the bushing in the first and second bores.

Abstract: 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 housing, a propeller shaft supported by the bearing mechanism and adapted to have mounted thereon a propeller, a sacrificial anode, and a mechanism for securing the anode to the bearing housing.

Abstract: A marine propulsion device comprises a steering member and a steerable member including a propeller. A steering mechanism operatively connects the steering member with the steerable member and includes an actuating and locking device. The actuating and locking device comprises a cylinder having opposite first and second end portions and a piston which is mounted for reciprocative movement within the cylinder between the first and second end portions. A drive assembly operatively connects the piston with the movable steering member to effect reciprocative movement of the piston in response to steering member movement. A driven mechanism operatively connects the piston with the steerable member such that piston reciprocation is transmitted into movement of the steerable member.