Yamaha Outboard - F20SWB. 15-Inch Shaft Yamaha Gray Remote Control Manual Start. Product Overview. The Yamaha F20SWB FourStroke Outboard in Yamaha Gray is a compact yet powerful 20HP portable engine designed for small craft that need reliable performance with remote control operation. With its 15-inch short shaft, it's well-suited for boats with shallow transoms, such as skiffs, dinghies, and utility boats.. Powered by a 2-cylinder SOHC FourStroke with Electronic Fuel Injection (EFI), the F20SWB delivers excellent fuel economy, smooth throttle response, and quiet operation. This model features a remote control setup for convenient handling and a manual start system, keeping it simple, reliable, and lightweight for easy installation and portability.. Key Features. Finish: Factory Yamaha Gray for corrosion resistance. Horsepower: 20HP FourStroke performance. Engine: 2-cylinder SOHC with EFI for smooth, fuel-efficient operation. Shaft Length: 15-inch (S) for shallow transoms and small boa