Patent ID: 8246399

Claim:
An outboard marine motor, comprising: an upper case receiving an internal combustion engine therein; a lower case connected to a lower end of the upper case so as to be rotatable relative to the upper case around a first vertical axial line; a mounting fixture configured to attach the upper case to a part of a watercraft, wherein the mounting fixture includes a swivel shaft that supports the upper case so as to be rotatable around a second vertical axial line which is different from and parallel to the first axial line; a propeller shaft extending in the lower case in a fore-and-aft direction; a propeller attached to a rear end of the propeller shaft projecting from a rear end of the lower case; a drive shaft extending vertically at least in the lower case coaxially with the first vertical axial line, and having an upper end connected to an output shaft of the engine in a torque transmitting relationship; a torque transmitting mechanism interposed between a lower end of the drive shaft and the propeller shaft; and an actuator provided in the upper case and configured to selectively turn the lower case around the first vertical axial line, the actuator including a power source and a worm gear mechanism for transmitting an output torque of the power source to the lower case.