Patent ID: 7594833

Claim:
A boat propulsion apparatus, comprising: a main body arranged to be mounted on a hull; and a locking mechanism arranged to prevent a swinging motion of the main body in a direction of a tilt up; wherein the main body includes: an electric motor; an indicating mechanism arranged to be rotatable and to indicate, by a position thereof, a type and an amount of an output of an operation mode having at least a forward mode and a reverse mode; a detecting mechanism arranged to detect an indication provided by the indicating mechanism; a first controller arranged to control an operation mode and an output of the electric motor depending on an output of the detecting mechanism; and a second controller arranged to control the locking mechanism depending on an indication provided by the indicating mechanism; wherein a range of rotation of the indicating mechanism includes at least a forward mode area indicating the forward mode and a reverse mode area indicating the reverse mode; and the first controller is arranged to switch the operation mode of the electric motor to the reverse mode and the second controller is arranged to lock the main body of the propulsion apparatus to the hull by operating the locking mechanism depending on an operation of rotating the indicating mechanism to the reverse mode area while the main body of the propulsion apparatus is mounted on the hull.