2021 Sea Ray SLX 310 Outboard

$229,900

Used

Boat in Tampa, FL 33602 US

builtBuilt in 2021
Year the boat was built
model

SLX 310 Outboard

Boat model
engine

2 Engines (2x Mercury)

Engine type and count
length

31.5 feet

Overall boat length
fuel

Gas

Fuel type
material

Fiberglass/Reinforced

Hull material
Nominal Length
31.5ft
Length Overall
33.83ft
Beam
10.17ft
Max Draft
2.67ft
Drive Up Draft
2ft
Deadrise At Transom
21deg
Dry Weight
10335lb
Heads
1
Fresh Water Tanks
24gal
Fuel Tanks
158gal
Holding Tanks
20gal
Hull Material
fiberglass
Hull Shape
modified-vee
Engine 1
Engine Make
Mercury
Engine Model
300XL Verado
Total Power
300hp
Engine Hours
136
Engine Type
outboard
Fuel Type
gasoline
Engine 2
Engine Make
Mercury
Engine Model
300XL Verado
Total Power
300hp
Engine Hours
136
Engine Type
outboard
Fuel Type
gasoline
Cockpit Shower
Cockpit Cushions
Swimming Ladder
Electric Bilge Pump
Marine Head
Battery Charger
Navigation Center
Plotter
Autopilot
Radio
Gps
Cockpit Speakers
Vhf
Cockpit Cover
Shore Power Inlet
Disclaimer

The Company offers the details of this vessel in good faith but cannot guarantee or warrant the accuracy of this information nor warrant the condition of the vessel. A buyer should instruct his agents, or his surveyors, to investigate such details as the buyer desires validated. This vessel is offered subject to prior sale, price change, or withdrawal without notice.

Price History

DateEventPrice
2/3/26Price decreased$229,900(-4.2%)
11/27/25Initial price$239,900

Contact Landmark Yacht Sales

Tampa Florida, Tampa, FL, 33626

Boattest.com Review

Overview

The C-Ray SLX310 is a premium model from C-Ray, blending luxury features with advanced technology. This boat is designed to offer both comfort and performance, making it suitable for a variety of recreational boating activities. Our evaluation includes a detailed inspection of its features and a comprehensive performance test.

Exterior Design and Deck Features

The SLX310 features a well-thought-out exterior with a spacious layout. The swim platform area provides 1 foot 1 inch of decking between the outboard well and the transom, creating ample space between the two swim platforms, which measure 4 feet fore and aft. The decking is covered with soft C-Deck non-skid material to enhance traction. Multiple water access points include a fold-out swim step equipped with a sensor for operator alert, ideal for diving or towing sports, and a traditional reboarding ladder certified by the NMMA for safety standards. The sun pad measures 3 feet 2 inches by 5 feet 4 inches and includes a five-position adjustable backrest, storage with built-in dividers beneath, and convenient cup holders integrated into the armrests. Stereo controls and a 12-volt charging station are embedded in the port armrest. The walkthrough from the swim platform rises by a 10-inch step featuring a hatch for wet gear storage and a freshwater shower. The hull houses 12-volt DC switches, a 110-volt battery charger, and a boarding step. The power tower, constructed from aluminum, serves as a high tow point for wakeboarders and supports an electrically actuated bimini shade that lowers 1 foot 8 inches without obstructing the driver's view. A hardtop option is also available.

Cockpit and Helm Station

The cockpit is designed for socializing and functionality, featuring L-shaped seating around a standard table that comfortably accommodates six guests. Upholstery in an earth-tone mocha color is enhanced with diamond stitching for a refined appearance. Storage is abundant, including under-seat compartments, a corner bolster storage area, and a glove box. The floor includes quick-dry pull-out mats and drainage for easy maintenance. The transom sun pad lifts hydraulically to reveal access to the battery pack and other mechanical components such as the engine steering pump and house batteries. A wet bar to starboard includes a sink, grill, storage cabinets, and a fridge/freezer compartment. Forward of the wet bar is an additional cozy seat. The helm station is equipped with dual 9-inch Simrad displays integrated with Mercury Digital Vessel View, offering chart plotting, depth sounding, water temperature, and fish finding capabilities. The helm features a tilt steering wheel, digital push-button start, and conveniently placed ignition keys outside the knee-strike zone. Controls include standard trim tabs, Mercury DTS spinnaker control, and optional joystick and active trim systems, which enhance handling and ease of operation. Visibility from the helm is excellent, aided by a windshield wiper and a low-glare dark vinyl dash insert. The helm seat and companion seat are upholstered with premium materials, include diamond stitching, and offer practical features such as flip-up bolsters, cup holders, grab handles, and swivel capability for the companion seat to engage with the cockpit area. Additional storage includes a closed cubby, an open tray with rubber mat, angled footrests, and an in-floor locker with a sliding drawer.

Private Accommodations and Head

The port console houses a well-appointed head compartment featuring a port light for ventilation, a stainless steel sink, a grab handle, and a vacuum flush toilet with a 20-gallon holding tank. The head is designed for convenience and comfort, complementing the boat’s overall luxurious feel.

Bow Seating and Storage

The bow area offers nearly a full circle of well-padded seating with a standard side-mounted table, with an option for a second table to starboard to accommodate larger gatherings. Two optional filler cushions can convert the seating into a large sun pad. The seats include padded armrests that fold up and down, grab rails, cup holders, and integrated speakers. Storage compartments are accessible beneath the seats, including a large compartment under the starboard seat that extends beneath the helm. The center seat cushion lifts to reveal a step and a hatch providing access to the anchor rode locker, which contains the windlass with remote operation, anchor sprayer, spotlight, and cleat. A beach boarding ladder can also be installed in this area.

Power and Performance

The SLX310 measures 33 feet 10 inches overall with a beam of 10 feet 2 inches and a dry weight of 10,335 pounds. Our test boat, with 50% fuel, two people, and gear, had an estimated test weight of 11,229 pounds. Powered by twin 300-horsepower Mercury Verado outboards, the boat achieved a top speed of 51.3 miles per hour at 5,500 RPM. The most efficient cruising speed was 35.8 miles per hour at 4,000 RPM, with a fuel consumption of 21.5 gallons per hour, yielding a range of approximately 237 statute miles while maintaining a 10% fuel reserve. The SLX310 planes quickly in 4.8 seconds and features SeaRay’s dynamic running surface triangular plates at the stern, which can be manually or automatically adjusted to optimize performance. The ride quality is solid and smooth, with a 21-degree deadrise that cushions impacts in choppy conditions. The boat’s high freeboard helps keep passengers dry, and it responds predictably during high-speed maneuvers. The joystick option greatly enhances precision during docking and low-speed handling.

Conclusion

The C-Ray SLX310 demonstrates a strong attention to detail, combining luxury, technology, and performance in a well-rounded package. Its user-friendly features, including advanced digital controls and thoughtful design elements, make it accessible to a wide range of boaters. The boat’s solid ride, responsive handling, and comprehensive amenities ensure it is well-equipped for enjoyable days on the water.

Overview from around the web 2021 Sea Ray SLX 310 Outboard

Customers praise the 2021 Sea Ray SLX 310 Outboard for its exceptional combination of luxury, performance, and versatility

Many highlight the smooth and powerful ride delivered by the outboard engines, making it ideal for both cruising and watersports. The spacious and thoughtfully designed cockpit offers ample seating and comfort, perfect for entertaining family and friends. Users also appreciate the high-quality craftsmanship and modern features, including advanced electronics and premium upholstery. Overall, owners commend the SLX 310 Outboard for its reliability, stylish design, and ability to provide a fun and memorable boating experience.

The Biggest Pros and Cons

The 2021 Sea Ray SLX 310 Outboard offers a blend of luxury, performance, and versatility, making it a popular choice for boating enthusiasts. Here are some of the pros and cons to consider:

Pros

Powerful Performance: Equipped with triple outboard engines, the SLX 310 Outboard delivers strong acceleration and impressive top speeds, ideal for watersports and cruising.

Spacious Layout: The boat features a well-designed cockpit with ample seating, including a versatile sunpad and convertible lounge areas, providing comfort for family and friends.

Luxury Features: High-quality materials and finishes, along with premium upholstery and stylish design elements, create an upscale ambiance on board.

Advanced Technology: The helm is outfitted with modern navigation and control systems, including touchscreen displays and integrated audio options.

Excellent Handling: The hull design offers a smooth, stable ride even in choppy conditions, enhancing safety and comfort.

Versatility: Suitable for a variety of activities like day cruising, entertaining, and watersports, thanks to features like a swim platform and storage compartments.

Cons

Price Point: As a luxury sport boat, the SLX 310 Outboard comes with a higher price tag, which may be a consideration for budget-conscious buyers.

Fuel Consumption: Triple outboard engines, while powerful, can result in higher fuel usage compared to single or twin-engine setups.

Limited Overnight Amenities: While comfortable for day use, the boat lacks extensive overnight accommodations, limiting its use for extended trips.

Size Considerations: At over 31 feet, the boat requires adequate storage space and may be less convenient to trailer or store compared to smaller models.

Made For

The 2021 Sea Ray SLX 310 Outboard is perfect for boating enthusiasts who seek a versatile and luxurious vessel that combines performance, comfort, and style. It’s ideal for families and friends who enjoy cruising, watersports, and entertaining on the water, offering spacious seating, advanced technology, and a smooth, powerful ride. Whether you’re planning day trips, weekend adventures, or social gatherings, this boat caters to those who appreciate quality craftsmanship and a premium boating experience.

Finance your dream boat!

Use our boat payment calculator to estimate monthly payments for 2021 Sea Ray SLX 310 Outboard. Enter your down payment, choose a loan term, and adjust the interest rate to see an instant payment estimate — ideal if you're calculating boat payments before you enquire. Wondering how much does a Bowrider cost in today's market, or how much does a Sea Ray cost for similar models? This boat financing calculator helps you compare scenarios in seconds, whether you're considering used boat financing or a new purchase.
Monthly payment
$1,455.81/mo
$
$
%
Principal Loan Amount$ 195,415
Total Payment$349,394.76

Finance your dream boat!

Use our boat payment calculator to estimate monthly payments for 2021 Sea Ray SLX 310 Outboard. Enter your down payment, choose a loan term, and adjust the interest rate to see an instant payment estimate — ideal if you're calculating boat payments before you enquire. Wondering how much does a Bowrider cost in today's market, or how much does a Sea Ray cost for similar models? This boat financing calculator helps you compare scenarios in seconds, whether you're considering used boat financing or a new purchase.
Monthly payment
$1,455.81/mo
$
$
%
Principal Loan Amount$ 195,415
Total Payment$349,394.76

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Tampa Florida
Tampa, FL 33626

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