Sea Ray SLX 310 Boats For Sale

The Sea Ray SLX 310 is a large bowrider in the SLX luxury lineup, built around outboard power and set up for all-around family use and entertaining. It measures 31 feet 6 inches overall with a beam of 10 feet 2 inches, a draft of about 2 feet 8 inches, and an empty weight of roughly 10,335 pounds. The 310 SLX OB carries Sea Ray's premium two-tone upholstery with diamond-pattern stitching, SeaDek flooring that matches the hull and interior color scheme, and yacht certification that places no fixed limit on passenger count as long as everyone has a life jacket aboard. Shoppers looking at a Sea Ray 310 SLX outboard will find model years spanning from 2017 through current 2024 builds.

Standard power on the Sea Ray SLX 310 OB is twin 300-horsepower Mercury Verado outboards, with twin 400-horsepower V10 engines available as the top option. On the base 300s, top speed reaches an impressive 55 mph (48 knots), with a 0-to-20 mph time under 6 seconds. A pair of 350-horsepower Verados turning 19-pitch Revolution props hit 53.4 mph at 5,900 RPM, came onto plane in 4.7 seconds, and passed 20 mph in 7.2 seconds. Best economic cruise landed at 4,000 RPM and 31.9 mph, where a 20.1 gallon-per-hour fuel burn returned 1.6 miles per gallon and a range of 250 statute miles while holding a 10% reserve of the 175-gallon fuel capacity. The hull banks steeply through turns, rolling about 17 degrees with the helm hard over and tracking cleanly rather than sliding.

The helm uses a glass or acrylic dash with dual Simrad displays, in either twin 12-inch screens or a 12-inch and 7-inch pairing, handling GPS, sonar, lighting and audio control, with a 4-inch SmartCraft display and optional VesselView. Sea Ray's Dynamic running surface, digital throttles, auto trim tabs and a leather-wrapped tilt wheel are within reach, and the double-wide helm seat has individual flip-up bolsters. Mercury's joystick piloting for outboards is offered with the twin Verados, bringing Skyhook virtual anchoring and integrated autopilot for tight-quarters docking. A remote-controlled spotlight aids low-light marina approaches.

The cockpit centers on a starboard wet bar with a Corian-style countertop, a freshwater sink, a trash receptacle and a refrigerator below, plus an optional Kenyon electric grill. A transom sun lounger measuring about 5 feet 4 inches across has pop-up backrests with multiple angle positions, cup holders and a stereo remote, and lifts to reveal deep self-draining storage. The L-shaped cockpit seating wraps around a fiberglass pedestal table, with a triangular teak cockpit table available as an upgrade. Freshwater washdown showers sit at both the bow and stern, a battery switch is positioned at the cockpit entry, and RGB ambient lighting strips run under the seating for night cruising.

Inside the port console is a full Marine head with a porcelain VacuFlush toilet, dockside and overboard discharge, a freshwater sink and a finished countertop, sized generously for a 31-footer. The first SLX 310 to offer a hardtop adds a manually opening sunroof and an electrically actuated shade awning that extends aft over the sun pad. The bow lounge is deep and wide with double-wide forward-facing seats, flip-down armrests, aft-facing speakers, a center pedestal base for a filler cushion or bow table, and storage under every seat and hatch. A concealed windlass is operated from the helm or a forward remote, with a manual backup, 8-inch cleats and an optional bow freshwater shower.

When weighing a Sea Ray SLX 310 for sale, the main choices are engine package and the hardtop with sunroof. The base twin 300s already deliver the higher top speed in lighter trim, while the 400-horsepower V10 option suits buyers wanting sports-car acceleration, both running through Mercury joystick control. The outboard layout frees up the swim platform and transom space that the SLX 310 OB uses for added seating and storage throughout.