Marine vessel propulsion system and marine vessel including the same

A marine vessel propulsion system comprising:

• a plurality of propulsion devices arranged to be mounted on a hull so as to enable a steering angle to change;
• a plurality of operation levers arranged to be operated by a marine vessel maneuvering operator to control the plurality of propulsion devices to have respective shift states selected from among a forward drive state, a neutral state, and a reverse drive state;
• a plurality of lever position sensors provided to correspond to the plurality of respective operation levers and arranged to detect positions of the plurality of operation levers;
• a storage unit arranged to store therein behavior patterns of the hull preset to correspond to positional relationships between the plurality of operation levers;
• and
• a control unit programmed to select among the behavior patterns based on detection results from the plurality of lever position sensors, and to control the steering angles and shift states of the plurality of respective propulsion devices to correspond to the selected behavior pattern.