The 25 GSBA we tested sported a humongous and growl-like 350 hp Yamaha V-8 for power, and it announced its presence with authority. With max speed just topping 50 mph at 6,350 rpm, the Yamaha pushed the big 25 GSBA around with ease. Best cruise was achieved at a sedate 17.4 mph and 2,500 rpm, where 3.6 mpg was recorded. That big V-8 is thirsty, though; at most any other speed level, mpg was in the 2s, not 3s. For those needing low-end grunt, this is your ride; we ripped zero to 30 multiple times in a consistent 5.4 seconds, enough to beat more than a few bass and speed hulls out of the hole. Our tester had optional power-assist hydraulic steering to keep that big Yam tightly harnessed with little effort at the wheel.