sterndriveyksikkönä

sterndriveyksikkönä is a Finnish term that translates to "sterndrive unit" in English. It refers to a type of marine propulsion system where the engine is located inside the hull of the boat, and the drive unit, which includes the propeller and the steering mechanism, is mounted on the outside of the stern. This system is also commonly known as an inboard/outboard (I/O) drive.

The sterndrive unit typically consists of a lower gearcase containing the propeller and a gimbal-mounted housing that allows for both steering and trim. The trim function enables the angle of the drive unit to be adjusted, which is crucial for optimizing the boat's performance at different speeds and water conditions. By adjusting the trim, the operator can lift the bow of the boat to reduce drag or lower it to improve visibility and handling in rough seas.

Sterndrives offer several advantages, including a cleaner transom appearance compared to outboard motors and easier access to the engine for maintenance since it's located inside the boat. They are popular in a wide range of recreational boats, from smaller runabouts to larger cruisers, providing a good balance of performance, efficiency, and maneuverability. The system combines the benefits of inboard engines with the external positioning of the propeller and steering, making it a versatile choice for many boaters.