Yamaha F25SWC Outboard Motor. 15-Inch Shaft 2-Cylinder Remote Mechanical Control Manual & Electric Start Manual Tilt Gray. The Yamaha F25SWC is a compact, short-shaft 25-horsepower outboard designed for boaters who need lightweight power with remote control convenience. Built with a 15-inch shaft, this model is a great fit for smaller boats with shallow transoms, such as skiffs, inflatables, and tenders. The manual start and manual tilt keep the design simple and lightweight, while Yamaha's two-