Abstract: An object of the present invention is to provide an outdrive unit that allows space to be saved in the positioning of a hydraulic circuit for trolling, and enables easy maintenance of the hydraulic circuit for trolling.

Abstract: A shift apparatus of an inboard-outboard drive in which shift operation can be carried out by electrical means without using known cables such as wires is provided. Solenoid valves 35 and 36 which carry out shifting operation in an oil-hydraulic circuit for operating an hydraulic clutch is attached to an oil-hydraulic control unit 31 in an upper casing 14 of an outer drive apparatus 4, and a waterproof cover 40 which covers the oil-hydraulic control unit 31 and the solenoid valves 35 and 36 are fixed on the upper casing 14. A connector 45 is interposed between electric wires 41, and arranged on a joint portion between a bell housing 18 and an upper casing 14.

Abstract: An object of the present invention is to provide an outdrive unit that allows space to be saved in the positioning of a hydraulic circuit for trolling, and enables easy maintenance of the hydraulic circuit for trolling.

Abstract: The present invention provides a marine reversing gear assembly, wherein a manual directional control valve 7a and an electromagnetic directional control valve 7b for a forward/reverse directional control valve 7 for hydraulic oil supply circuit 10 have a common structure of an oil line joint surface for the hydraulic oil supply circuit 10 for friction discs of a forward clutch 2f and a reverse clutch 2a, and the forward/reverse directional control valve 7 for the hydraulic oil supply circuit 10 can be changed to either the manual directional control valve 7a or the electromagnetic directional control valve 7b by exchanging spools 7c or 7e of the manual directional control valve 7a or the electromagnetic directional control valve 7b. Therefore, the operational manner of the forward/reverse directional control valve for the hydraulic oil supply line of a marine reversing gear assembly can be changed quite easily between the manual directional control valve and the electromagnetic directional control valve.

Abstract: The subject invention provides a cooling system for a stern drive, including: a conduit having a water outlet for discharging ambient water, which is introduced by using a water current generated by propulsion of a boat to which said stern drive is mounted, the water outlet being directed toward a side wall of a housing containing a gear and a clutch where heat is generated, at a location near the gear and the clutch; and a cover removably attachable to the housing, the conduit being contained between the cover and the housing, the cover defining a space to which water is discharged from the water outlet and a drain section for draining the water.

Abstract: The present invention provides a marine reversing gear assembly, wherein a manual directional control valve 7a and an electromagnetic directional control valve 7b for a forward/reverse directional control valve 7 for hydraulic oil supply circuit 10 have a common structure of an oil line joint surface for the hydraulic oil supply circuit 10 for friction discs of a forward clutch 2f and a reverse clutch 2a, and the forward/reverse directional control valve 7 for the hydraulic oil supply circuit 10 can be changed to either the manual directional control valve 7a or the electromagnetic directional control valve 7b by exchanging spools 7c or 7e of the manual directional control valve 7a or the electromagnetic directional control valve 7b. Therefore, the operational manner of the forward/reverse directional control valve for the hydraulic oil supply line of a marine reversing gear assembly can be changed quite easily between the manual directional control valve and the electromagnetic directional control valve.

Abstract: The present invention provides a marine reversing gear assembly, wherein a manual directional control valve 7a and an electromagnetic directional control valve 7b for a forward/reverse directional control valve 7 for hydraulic oil supply circuit 10 have a common structure of an oil line joint surface for the hydraulic oil supply circuit 10 for friction discs of a forward clutch 2f and a reverse clutch 2a, and the forward/reverse directional control valve 7 for the hydraulic oil supply circuit 10 can be changed to either the manual directional control valve 7a or the electromagnetic directional control valve 7b by exchanging spools 7c or 7e of the manual directional control valve 7a or the electromagnetic directional control valve 7b. Therefore, the operational manner of the forward/reverse directional control valve for the hydraulic oil supply line of a marine reversing gear assembly can be changed quite easily between the manual directional control valve and the electromagnetic directional control valve.

Abstract: A shift apparatus of an inboard-outboard drive in which shift operation can be carried out by electrical means without using known cables such as wires is provided. Solenoid valves 35 and 36 which carry out shifting operation in an oil-hydraulic circuit for operating an hydraulic clutch is attached to an oil-hydraulic control unit 31 in an upper casing 14 of an outer drive apparatus 4, and a waterproof cover 40 which covers the oil-hydraulic control unit 31 and the solenoid valves 35 and 36 are fixed on the upper casing 14. A connector 45 is interposed between electric wires 41, and arranged on a joint portion between a bell housing 18 and an upper casing 14.

Abstract: An object of the present invention is to provide a trolling device which can reduce the operational force of a trolling lever while the oil pressure setting of a marine gear is raised to increase the capacity of a transmission torque. The trolling device has a pressure reducing valve 23 for reducing clutch oil pressure and a low speed valve 22 for adjusting the spring force of a pilot spring 24 of the pressure reducing valve 23 in conjunction with a trolling lever 25, the low speed valve 22 having a protrusion 22a which extends inside a coil spring constituting the pilot spring 24 to the side of the pressure reducing valve 23 and comes into contact with the pressure reducing valve 23 at least when forward and reverse clutches are fully engaged, the protrusion 22a having a drain oil passage 22c which comes into communication with an orifice 23c when in contact with the pressure reducing valve 23 during trolling and discharges drain oil from the orifice 23c.

Abstract: An object of the present invention is to provide a trolling device which can reduce the operational force of a trolling lever while the oil pressure setting of a marine gear is raised to increase the capacity of a transmission torque. The trolling device has a pressure reducing valve 23 for reducing clutch oil pressure and a low speed valve 22 for adjusting the spring force of a pilot spring 24 of the pressure reducing valve 23 in conjunction with a trolling lever 25, the low speed valve 22 having a protrusion 22a which extends inside a coil spring constituting the pilot spring 24 to the side of the pressure reducing valve 23 and comes into contact with the pressure reducing valve 23 at least when forward and reverse clutches are fully engaged, the protrusion 22a having a drain oil passage 22c which comes into communication with an orifice 23c when in contact with the pressure reducing valve 23 during trolling and discharges drain oil from the orifice 23c.

Abstract: The present invention provides a marine reversing gear assembly, wherein a manual directional control valve 7a and an electromagnetic directional control valve 7b for a forward/reverse directional control valve 7 for hydraulic oil supply circuit 10 have a common structure of an oil line joint surface for the hydraulic oil supply circuit 10 for friction discs of a forward clutch 2f and a reverse clutch 2a, and the forward/reverse directional control valve 7 for the hydraulic oil supply circuit 10 can be changed to either the manual directional control valve 7a or the electromagnetic directional control valve 7b by exchanging spools 7c or 7e of the manual directional control valve 7a or the electromagnetic directional control valve 7b. Therefore, the operational manner of the forward/reverse directional control valve for the hydraulic oil supply line of a marine reversing gear assembly can be changed quite easily between the manual directional control valve and the electromagnetic directional control valve.