Marine engines are specialized engines designed to power boats and ships. They can be powered by various fuels, including diesel and gasoline, and are built to withstand the harsh conditions of the ocean. These engines are crucial for propulsion, helping vessels move through water efficiently. There are different types of marine engines, such as inboard engines, which are installed inside the hull, and outboard engines, which are mounted on the outside. Additionally, marine diesel engines are popular for larger vessels due to their fuel efficiency and durability. Proper maintenance is essential for optimal performance and longevity.