Yamaha F150XSA Outboard Motor. 25-Inch Shaft Digital Electronic Control (DEC) Electric Start Power Trim & Tilt Gray. ⚠️ Important: This is a Digital Electronic Control (DEC) engine and must be installed by an authorized Yamaha dealer. Both the outboard and the DEC control system require flashing and configuration with Yamaha diagnostic tools during installation. DIY installation is not supported.. The Yamaha F150XSA Outboard Motor offers 150 horsepower of smooth, reliable, and fuel-efficient per