Boat engines are essential for powering various types of watercraft, from small fishing boats to large yachts. They come in different types, including outboard engines, which are mounted on the transom, and inboard engines, which are housed inside the boat. These engines can run on gasoline or diesel fuel, providing the necessary thrust to move the boat through the water. The performance of a boat engine is measured in horsepower, which indicates how much power it can generate. Additionally, boat engines often include components like propellers and gearboxes to help control speed and direction. Regular maintenance is crucial to ensure the engine operates efficiently and lasts longer.