The stern drive unit, commonly found on recreational boats, transmits engine power to the propeller. It represents a combined inboard/outboard system where the engine resides inside the hull, and the drive mechanism is externally mounted. This configuration facilitates efficient propulsion and maneuverability in marine applications.
This drive system has seen widespread adoption due to its balance of performance, affordability, and ease of maintenance. Its design allows for trim adjustment, optimizing boat performance under varying load and water conditions. Its introduction marked a significant advancement in recreational boating technology, offering boaters a reliable and user-friendly propulsion solution.