- Stock #304459 - SLX 310 powered by twin 300 HP Mercruisers with low hours! 2021 Sea Ray SLX 310 with twin Mercruiser 6.2L I/O for sale located In Trenton, MI. An expansive cockpit area, an aft-facing lounger that converts to a sun pad, and a wet bar make relaxation and onboard entertaining easy on this Sea Ray! The SLX's twin MerCruiser engines and innovative Quiet Ride hull feature a smooth and comfortable ride for all-day fun on the water. The helm comes with dual 9" Simrad SelectResponse Glass Dash displays with Mercury VesselView Link Data, chart plotting maps, depth and fishfinder... read more