Sea Ray SLX 310: Where Premium Bowrider Meets Sterndrive Precision

Photo Credit: Sea Ray

The sun is low over the bay, and you're threading through the no-wake zone with a crew of eight aboard. Your thumb rests on the joystick. The twin MerCruiser sterndrives pivot the 31-footer sideways into a slip barely wider than the beam. No drama. No second attempt. Just the quiet satisfaction of knowing your boat does exactly what you ask it to do.

The Sea Ray SLX 310 sits at the intersection of luxury bowrider design and serious performance engineering. It's a boat for owners who've graduated from entry-level runabouts but aren't ready to sacrifice the open-air freedom of a bowrider for a cabin cruiser. With twin 250 hp MerCruiser 4.5L engines as standard and the option to upgrade to 350 hp, the SLX 310 delivers the kind of refined power that makes weekend trips feel effortless.

Who It's For

This is a 31-foot, 6-inch platform built for the owner who entertains regularly and takes boating seriously. If your typical weekend involves eight to ten guests, multiple anchorages, and the expectation that everyone stays comfortable from departure to docking, the SLX 310 delivers.

The sterndrive configuration appeals to owners who prioritize interior volume and swim platform access over the maintenance simplicity of outboards. You gain a full-width swim platform unobstructed by engines, plus additional in-hull storage where outboard versions sacrifice space for engine wells. The trade is familiar to anyone who's owned sterndrives: more attention to corrosion prevention in saltwater environments, but a cleaner aesthetic and more usable real estate at the transom.

The SLX 310 competes directly with the Formula 310 Bowrider and Cobalt R30, but Sea Ray's approach leans toward comfort and technology over outright speed. This is the boat for the owner who values a whisper-quiet cruise at 35 mph more than a white-knuckle sprint to 55.

Design & Layout

Sea Ray's design language on the SLX series emphasizes sculpted hull lines and three-tone upholstery that reads as yacht-grade rather than runabout-casual. The 310's exterior profile features aggressive chines and a 21-degree deadrise at the transom, a hull form that balances soft-water handling with predictable behavior in a chop.

The bow cockpit is adult-sized, with forward-facing backrests wide enough that two passengers can stretch out without obstructing sightlines from the helm. Extra-wide cushions and flip-up armrests make the bow a legitimate lounge space, not just overflow seating. A side table option adds a dedicated surface for drinks and devices.

Amidships, the helm features a double-wide bench with independent flip-up bolsters for the captain and first mate. The dash is dominated by Sea Ray's Dynamic Display system: dual Simrad touchscreens (9-inch standard, 12-inch optional) that consolidate navigation, vessel data, and Mercury VesselView Link into a clean, switch-free interface. Critical functions like the blower, bilge pump, and horn retain manual backups, a thoughtful nod to reliability when electronics fail.

The cockpit L-shaped lounge seats five comfortably, and the starboard wet bar comes standard with a sink and storage. Behind the helm, an aft-facing love seat converts the space into a conversation pit at anchor. The real showpiece is the transom sun pad: a 5-foot-4-inch by 3-foot-2-inch cushion with a five-position backrest that rises from within the pad. It's equally suited for tanning, gearing up for watersports, or simply watching the sunset with a drink in hand.

Below deck, the port console houses a head compartment with 4 feet 6 inches of headroom, a stainless-steel sink, and a VacuFlush toilet. It's a proper marine head, not an afterthought, with 20-gallon holding capacity and optional macerator system.

Performance & Handling

The SLX 310 with twin 250 hp MerCruiser 4.5L engines and Bravo Three drives reaches plane in 5.3 seconds and hits 30 mph in 11.5 seconds. Top speed sits around 50 mph with the base engines; upgrading to the 350 hp option pushes that closer to 55 mph. Cruise speed at 35 mph delivers a comfortable, fuel-efficient ride that keeps conversation easy and doesn't rattle the glassware.

Sea Ray's Quiet Ride technology—a combination of acoustic insulation, vibration-dampening materials, and strategic hull design—keeps sound levels at 80 decibels at cruise. At wide-open throttle, most of the noise comes from wind, not engines. The Verado-powered outboard version is marginally quieter at idle, but the sterndrive configuration holds its own underway.

The optional Dynamic Running Surface (DRS) uses GPS data, gyroscopes, and software-controlled trim plates to optimize running angle, reduce bow rise, and even shape wakes for watersports. In testing, DRS shaved a full second off the time to 30 mph and improved fuel efficiency at cruise by adjusting trim on the fly. Manual override keeps control in the captain's hands when conditions demand it.

Handling is predictable and confidence-inspiring. Lock-to-lock turns at 30 mph feel planted, with no tendency to slide or skip. The 21-degree deadrise absorbs moderate chop without pounding, and the 10-foot-3-inch beam provides stability at rest. The optional Axius joystick system makes close-quarters maneuvering a non-issue, even for less experienced operators.

A client in Charleston runs his SLX 310 every weekend from April through October, splitting time between the harbor and barrier island anchorages. He upgraded to the 350 hp engines and added the DRS system. His typical routine: depart the marina at 8 a.m. with six guests, cruise 20 miles to a sandbar, anchor for four hours, then run to a waterfront restaurant for dinner. The boat handles the 40-mile round trip without drama, and the fuel burn at 35 mph cruise keeps the day's cost predictable. His takeaway: "I never feel like I'm compromising. The boat does everything I ask, and my guests are comfortable the entire time."

The Ownership Conversation

The SLX 310 with sterndrive power starts around $215,000 with base engines. Upgrading to 350 hp, adding the DRS system, joystick control, and premium audio pushes the as-equipped price closer to $250,000. Annual operating costs—fuel, insurance, slip fees, and maintenance—typically run $15,000 to $20,000 for an owner who logs 50 to 75 hours per season.

Sterndrive maintenance requires more attention than outboards, particularly in saltwater. Budget for annual bellows inspections, gimbal bearing service, and corrosion prevention treatments. The trade-off is a cleaner transom, more interior storage, and a swim platform you can actually use without stepping over engines.

The SLX 310 is an owner-operator boat. You don't need crew, and the systems are intuitive enough that a competent captain can handle docking, anchoring, and underway operations solo. The joystick system lowers the skill floor significantly, making this a viable choice for owners stepping up from smaller boats.

Resale value on Sea Ray's SLX series holds steady, particularly for well-maintained examples with desirable options like joystick control and upgraded engines. The sterndrive version typically sells faster than the outboard variant in markets where swim platform access and interior volume matter more than maintenance simplicity.

Where to Start

Explore full specifications at www.YachtSpecsDirect.com.

Browse available Sea Ray inventory at www.mintedyachts.com/sea-ray.

The SLX 310 rewards owners who know what they want and aren't willing to compromise on comfort, technology, or performance.