Patent ID: 8105199

Claim:
An outboard motor comprising: a power transmission mechanism arranged to transfer an output power from an engine to a propeller; wherein the power transmission mechanism includes a transmission planetary gear train that is arranged to transform the output power of the engine before transferring the output power of the engine to the propeller; the transmission planetary gear train includes a transmission sun gear, a transmission double planetary gear set, and a transmission internal gear, wherein a first transmission planetary gear of the transmission double planetary gear set meshes with the transmission sun gear, and a second transmission planetary gear of the transmission double planetary gear set meshes with the transmission internal gear; the transmission sun gear is connected via a first clutch to an input end shaft extending from the engine, and the transmission sun gear is also connected via a second one-way clutch to a mounting member; the transmission double planetary gear set is connected via a second clutch to the input end shaft extending from the engine, and the transmission double planetary gear set is also connected via a first one-way clutch to the mounting member; the transmission internal gear is connected to an output end shaft extending toward the propeller; and the transmission planetary gear train is arranged such that when the second clutch is engaged and the first clutch is disengaged, rotational movement of the transmission sun gear is restricted by the second one-way clutch, causing the transmission double planetary gear set to make an orbital motion around the transmission sun gear, and the transmission internal gear to rotate in the same direction as the orbital motion of the transmission double planetary gear set around the transmission sun gear so as to deliver a second output power to the output end shaft extending toward the propeller.