An outboard motor includes a gear housing configured to rotatably house a propeller shaft that transmits a rotative power output from an engine to a propeller device. The gear housing includes a torpedo shape portion and a strut portion. The torpedo shape portion has a shape tapered toward a front side, and a shape biased upward toward the front side. The strut portion is disposed on an upper side of the torpedo shape portion. An outer peripheral surface of the torpedo shape portion is smoothly coupled to an outer peripheral surface of the strut portion via first to third curved surfaces. The first to third curved surfaces are each a curved surface inclined rearward and downward, a curved surface parallel to a front-rear direction, or a curved surface constituted of a part inclined rearward and downward and a part parallel to the front-rear direction.

An outboard motor includes a gear housing configured to rotatably house a propeller shaft that transmits a rotative power output from an engine to a propeller device. The gear housing includes a torpedo shape portion and a strut portion. The torpedo shape portion has a shape tapered toward a front side, and a shape biased upward toward the front side. The strut portion is disposed on an upper side of the torpedo shape portion. An outer peripheral surface of the torpedo shape portion is smoothly coupled to an outer peripheral surface of the strut portion via first to third curved surfaces. The first to third curved surfaces are each a curved surface inclined rearward and downward, a curved surface parallel to a front-rear direction, or a curved surface constituted of a part inclined rearward and downward and a part parallel to the front-rear direction.

A device including an outboard motor including a jet outlet portion, a stabilizer plate, and a rudder, where the stabilizer plate includes a first end portion and a second end portion, where the first end portion is proximal to the jet outlet portion, where the second end portion is distal to the jet outlet portion, where the rudder extends from the stabilizer plate between the first end portion and the second end portion.

A device including an outboard motor including a jet outlet portion, a stabilizer plate, and a rudder, where the stabilizer plate includes a first end portion and a second end portion, where the first end portion is proximal to the jet outlet portion, where the second end portion is distal to the jet outlet portion, where the rudder extends from the stabilizer plate between the first end portion and the second end portion.

A trolling plate which, together with a supporting and deployment mechanism, is fixed to and strutted from an outboard motor without the need for engineering modifications or the use special tools; said trolling plate being pivotably deployable into the water in the zone immediately downstream of the propeller of the outboard motor to substantially block the efflux from said propeller and thereby reduce its propulsive effort; said deployment being effected in a universally variable way by means of a suitable actuator; control means of said actuator and/or said deployment mechanism incorporating means to permit the immediate retraction of said trolling plate should it impact an obstruction or should the power of said outboard motor suddenly be increased.

A trolling plate which, together with a supporting and deployment mechanism, is fixed to and strutted from an outboard motor without the need for engineering modifications or the use special tools; said trolling plate being pivotably deployable into the water in the zone immediately downstream of the propeller of the outboard motor to substantially block the efflux from said propeller and thereby reduce its propulsive effort; said deployment being effected in a universally variable way by means of a suitable actuator; control means of said actuator and/or said deployment mechanism incorporating means to permit the immediate retraction of said trolling plate should it impact an obstruction or should the power of said outboard motor suddenly be increased.

An outboard motor for attachment to a hull of a marine vessel includes a lower case including a propeller shaft to rotate a propeller, and an upper case including a drive shaft to transmit a power to the propeller shaft. The lower case is selected from among different types of lower cases to be attached to the upper case, and the upper case and the lower case are connected by an intermediate structure.

An outboard motor stabilizer of unitary construction has a cylindrical body and an axially oriented cylindrical orifice with an opening at the bottom end of the body. The orifice has a diameter sized to fit onto a tilt rod of an outboard motor and is of a length that is longer than the tilt rod of the outboard motor.

An outboard motor stabilizer of unitary construction has a cylindrical body and an axially oriented cylindrical orifice with an opening at the bottom end of the body. The orifice has a diameter sized to fit onto a tilt rod of an outboard motor and is of a length that is longer than the tilt rod of the outboard motor.

Provided herein is a marine propulsion apparatus including a prime mover having a drive shaft, a cowling enclosing the prime mover, first and second struts affixed to the cowling, where each of the struts have a leading portion, an interior belt void, and a trailing portion. The apparatus further includes a lower unit coupled to the distal ends of the struts, a sprocket rotatably disposed within the lower unit, a shaft rotatably coupled to the sprocket, a belt rotatably coupling the drive shaft to the sprocket, such that a first portion of the belt is disposed within the interior belt void of the first strut and a second portion of the belt is disposed within the interior belt void of the second strut. The apparatus further includes a thermal circuit (having a heat transfer fluid) extending from the cowling, through each of the struts, and into the lower unit.