outboard
n. B2 Upper Intermediate US //ˈaʊtˌbɔɹd// UK //aʊtbˈɔːd// out·board
n. a type of small boat engine that hangs outside the boat. It is usually powered by a gasoline engine and is easy to repair.
n. a small internal-combustion engine mounted on the stern of a boat, typically used for propulsion. Often used in the plural to refer to the engine itself.
The boat has a powerful outboard engine.
Because the outboard is located on the back of the boat, it is easier to maintain and repair than an inboard engine.
While inboard engines offer a more streamlined design, many recreational boaters prefer the outboard for its simplicity and the ability to quickly replace the unit if it fails during a trip.