Marine diesel engines are powerful machines designed to propel ships and boats. They operate on diesel fuel, which is more efficient and provides greater torque than gasoline. These engines are built to withstand harsh marine environments, ensuring reliability and durability during long voyages. The design of marine diesel engines often includes features like turbocharging and intercooling to enhance performance. They are typically larger and heavier than land-based diesel engines, allowing them to generate the necessary power for large vessels. Common applications include cargo ships, fishing boats, and yachts.