The DF15A EFI is the world's first 15 HP outboard motor designed with Lean Burn and Battery-Less Electronic Fuel Injection. The Suzuki EFI system is battery-free, an industry first in this horsepower class. The DF15A EFI is a smooth-running "Next Generation" four-stroke that offers quick starts, great acceleration, incredible performance, and excellent fuel economy. The DF15A EFI not only has a competitive fuel economy, but it also thrives with battery-less fuel injection. Bring all of the power to your craft, but none of the dead weight.