An outboard motor is a type of propulsion system used on boats. It consists of an engine, gearbox, and propeller all in one unit, which is mounted on the outside of the boat's transom. Outboard motors are popular for their ease of use, portability, and ability to provide power for various types of watercraft, from small fishing boats to larger recreational vessels. These motors can be powered by gasoline or electricity, with many modern models offering improved fuel efficiency and reduced emissions. Outboard motors are available in various sizes and horsepower ratings, making them suitable for different boating needs and activities, such as fishing, water sports, and cruising.