Drive source switching system for marine propulsion device including multiple drive sources, and method of switching drive sources of marine propulsion device

A drive source switching system for a marine propulsion device, the drive source switching system comprising:

• a first drive source;
• a second drive source;
• a propeller shaft to rotate propeller blades to generate a propulsive force;
• a first driving member to transmit a drive force generated by the first drive source;
• a second driving member to transmit a drive force generated by the second drive source;
• a first driven member that is movable in an axial direction of the propeller shaft and engageable with the first driving member;
• a second driven member that is movable in the axial direction of the propeller shaft and engageable with the second driving member;
• and
• a controller configured or programmed to control a movement of the first driven member;
• wherein
• the first driven member transmits the drive force generated by the first drive source to the propeller shaft when engaged with the first driving member;
• the second driven member transmits a drive force generated by the second drive source to the propeller shaft when engaged with the second driving member;
• and
• when the controller controls the first driven member to move from a first position, where the first driven member is not engaged with the first driving member, in the axial direction of the propeller shaft toward the first driving member, the controller controls the first driven member to be driven back in a direction toward the first position when the first driven member fails to be engaged with the first driving member.