Marine propulsion system and control method

A marine propulsion system comprising:

• a plurality of marine propulsion devices each including a propeller shaft, an engine, an electric motor, a power transmission, an electric circuit, and a controller, the power transmission to transmit mechanical power to the propeller shaft from at least one of the engine and the electric motor, the electric circuit being connected to the electric motor, and the controller being configured or programmed to control the engine;
• wherein
• in each of the plurality of marine propulsion devices, the controller is configured or programmed to put a limitation on an output of the engine that is in a driving state when an engine in any other of the plurality of marine propulsion devices is not being driven.

A method of controlling a marine propulsion system, the marine propulsion system including a plurality of marine propulsion devices each including a propeller shaft, an engine, an electric motor, a power transmission, and an electric circuit, the power transmission to transmit mechanical power to the propeller shaft from at least one of the engine and the electric motor, and the electric circuit being connected to the electric motor, the method comprising:

• determining whether or not the plurality of marine propulsion devices are communicable with each other;
• and
• putting a limitation on an output of the engine that is being supplied with electric power when one of the plurality of marine propulsion devices is incommunicable with any other of the plurality of marine propulsion devices.