QR Code Link to This Post Maybe Trade For A Motorcycle. 18ft speed boat with a 4.3 Mercruiser Alpha One. All the seals in the lower unit have been replaced. It's got a Stainless 23 pitch Mirrage Plus prop that definitely pushes the boat and sets the look. I upgraded the mufflers on the boat and it definitely has a nice throaty sound. Brand new gas tank. Very fun boat and gets a lot of attention. Any questions just ask. Thanks, Let's block ads! (Why?)