For people who demand speed and acceleration from their outboards, the OptiMax Pro XS is the only choice. Mercury engineers leveraged the Mercury Racing heritage to develop this family of high-performance direct injected outboards. The result is an outboard family that blows away the competition when it comes to power, durability, performance and fuel efficiency. Nothing on the water today is faster or more proven than the OptiMax Pro XS. And we’re proud to introduce the newest addition to this family, the 150 hp OptiMax Pro XS. In head-to-head tests, the 150 Pro XS outran the competition by almost 5 MPH while delivering 15% better fuel economy! The 150 Pro XS is a perfect fit for those anglers looking to increase the performance of their 18-foot fishing boats. With remarkable acceleration and awesome performance, the OptiMax Pro XS lineup has created a class of its own. Nothing else is faster or more proven than the OptiMax Pro XS.