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Subaru offers a line of electronic fuel injection (EFI) engines, which are ideally suited for use with a variety of equipment, including welders, generators, pressure washers and lawnmowers. The line includes two models, the EH72 V-Twin and EH72 UTV, both of which are designed to reduce fuel consumption and emissions, while providing fast, easy starts in a wide range of ambient temperatures. Used in car engines since the 1980s, EFI technology has been applied by Subaru to its small, air-cooled industrial engines. The EFI engines run on an open-loop system, which utilizes an electronic control unit (ECU). Using several different sensors that are able to accurately detect manifold pressure, ambient temperature and throttle position, the ECU is constantly relaying information to the injector, which is then able to deliver the proper air-to-fuel ratio.