Yamaha F25SWTHC Outboard Motor. 15-Inch Shaft 2-Cylinder Tiller Handle Electric & Manual Start Power Trim and Tilt Gray. The Yamaha F25SWTHC is a lightweight, short-shaft 25-horsepower outboard designed for small boats that need reliable power and modern convenience in a compact package. Outfitted with a tiller handle for direct steering, electric & manual start for easy ignition, and power trim and tilt for effortless adjustment, this model is perfect for jon boats, inflatables, skiffs, and ten