2019 Mercury Marine® Pro XS® 150 Extraordinary engineering for extraordinary speed. When you're feeding your need for speed, Mercury Pro XS engines will get you there faster. Engineered to meet the demands for high speeds on fresh or salt water, these high-performance motors deliver a winning combination of power, acceleration, durability, and fuel efficiency. Engine Details Built to take you almost anywhere and nearly 20 pounds lighter than its closest competitor, it's an incredibly fast high-output 150hp FourStroke outboard. Great for bass, offshore fishing, and runabout boats.