Yamaha XF450XSA4 Outboard Motor. 25-Inch Shaft 5.6-Liter V8 Digital Electronic Control Electronic Fuel Injection Electric Start Power Trim and Tilt Classic White. The Yamaha XF450XSA4 is the 25-inch shaft, Classic White version of Yamaha's most powerful offshore outboard. Delivering 450 horsepower from its 5.6-liter V8 platform, this model combines unmatched offshore performance with Yamaha's refined Classic White finish-perfect for premium fishing boats and luxury offshore yachts. Its Digital E