What kind of engine configuration does an outboard engine have?

An outboard engine is designed to be mounted on the transom of a boat. This configuration allows for easy installation, maintenance, and replacement. The transom is the flat surface at the rear of the boat, providing stability and support for the engine. Outboard engines are advantageous because they are self-contained units that include both the engine and the propeller, making them efficient for powering smaller vessels. Additionally, mounting on the transom allows for easy tilt and adjustment, which can improve performance in various water conditions.

The other configurations listed do not accurately describe an outboard engine's typical setup. For example, mounting on the side or in the hull could potentially limit access for maintenance and overlook the inherent design advantages of an outboard motor. Similarly, placing an engine at the bow is not practical since it would impact the boat's balance and maneuverability. Therefore, the most accurate description of an outboard engine's configuration is that it is mounted on the transom.