2005 Cobalt 343
$97,500
Boat in Pottsboro, TX 75076 US
Built in 2005
343
2 Engines (2x MerCruiser)
35.3 feet
Gas
Fiberglass/Reinforced
With her sleek profile, luxurious amenities, and high-performance stepped hull, the Cobalt 343 delivers a full blast of power and raw sex appeal. This is the kind of boat that puts the excitement back into boating-a fast, user-friendly cruiser that attracts a crowd just about everywhere she goes. Built on a slender deep-V hull with a full-length keel pad, the 343 has a cockpit capable of seating six passengers in extreme comfort. The electric centerline captain's seat, with its wraparound dash and excellent visibility, is one of the more notable features of this boat. Molded steps on either side of the cockpit provide easy access to the foredeck, and the cabin door slides on polished stainless runners. Inside, the cabin is as elegant as it is simple. An Ultraleather settee and enclosed head are standard, and while the headroom is modest, the accommodations are plush. An impressive array of standard equipment includes an air compressor, 10-disc CD changer, through-prop exhaust, power motorbox and an extended swim platform. A fast ride with twin 425hp MerCruiser engines, the Cobalt 343 will cruise in the high 30s and reach a top speed of 50+ knots.
Volvo Penta also available.
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
| Date | Event | Price |
|---|---|---|
| 4/19/26 | Price decreased | $97,500(-0.5%) |
| 2/19/26 | Price decreased | $98,000(-0.5%) |
| 10/28/25 | Price decreased | $98,520(-11.7%) |
| 6/28/25 | Initial price | $111,520 |
2005 Cobalt 343 Video Tours
Boattest.com Review
Overview
Cobalt has long been recognized for producing world-class sport boats, though it has not been widely known in the high-performance segment—until now. The Cobalt 343 represents a significant advancement for the brand, emerging from three years of dedicated research and development. This model is designed to combine high-performance capabilities with the luxury and attention to detail that Cobalt is known for, aiming to deliver an exhilarating and refined boating experience.
Exterior Design and Deck Features
The Cobalt 343 features a thoughtfully designed exterior that prioritizes both performance and comfort. Wide side decks facilitate easy movement around the boat, while a fender locker equipped with gas-assisted lifts provides convenient storage. The deck layout includes two individual sun pads and two stern benches separated by a spacious walk-through, with double-hinged seats offering ample storage beneath. Practical amenities such as an inflator for water toys and a tool kit are integrated into the port bench compartment, which also houses battery switches, main breakers, and canvas pole storage. The two-level transom and swim platform provide close access to the water, protected by a wraparound stainless steel bar that serves as a handhold and dock guard. A dive-style ladder deploys effortlessly via a lever, and stainless steel vents and fins ensure fresh air circulation to the engine compartment. Additional features include a swim shower and water hookup located in the starboard compartment.
Interior Living Spaces
Inside the cabin, the Cobalt 343 offers a level of refinement more commonly found on mega-yachts or aircraft. The cabin door is a solid, non-sliding design that opens to reveal a port-to-starboard V-shaped bench seating area. A flat-panel television is mounted in one corner, providing entertainment options for evening relaxation. The enclosed head includes a port-a-potty, sink, and vanity, ensuring privacy and convenience. At the stern, rear-facing bench seats create a spacious conversation area, with the double-hinged seating providing cavernous storage below.
Helm and Controls
The helm station of the 343 is designed with a futuristic, cockpit-like layout. To the left of the helm, a bank of rocker switches is complemented by two rows of gauges, including water and air temperature indicators as well as digital depth gauges. The helm features Gaffrig instrumentation and LaVorsi precision engine controls, allowing the operator precise command over the vessel. The pilot seat is equipped with electric lifts that enable a quick transition from seated to standing driving positions. This ergonomic and technologically advanced helm setup enhances control and comfort during operation.
Power and Performance
Performance on the Cobalt 343 is driven by twin 496 V8 engines, each producing 425 horsepower. The boat incorporates Cobalt's first-ever step-tall hull design, augmented by a padded keel and a knot's transom, which together contribute to exceptional stability and a smooth ride even in choppy seas. The hull design ensures the boat remains firmly planted on the water during straight runs and maintains excellent grip through turns. The engines feature a closed cooling system, an air-actuated single-point water drain system with an included air pump, and a single serpentine belt driving all components. The engine control module utilizes a motor oil microprocessor to optimize fuel mixture, knock control, and ignition timing independently for each cylinder, resulting in precise and efficient performance. The 343 measures 35 feet 4 inches in length overall with a beam of 9 feet 8 inches and a draft of 28 inches with the drive up, extending to 37 inches with the drive down. It weighs approximately 10,200 pounds with twin CERN drives and carries 200 gallons of fuel, meeting yacht certification standards. Economically, the boat cruises at 3,500 RPM, achieving 40.9 miles per hour with a fuel consumption of 31.5 gallons per hour, offering a range of 234 miles on a full tank. At wide-open throttle, it reaches 5,100 RPM and a top speed of 62.4 miles per hour.
Conclusion
The Cobalt 343 successfully blends high-performance engineering with the luxury and meticulous craftsmanship that the brand is known for. Its innovative hull design and powerful twin engines deliver thrilling speed and handling, while the thoughtfully designed interior and exterior spaces provide comfort and convenience for extended outings. With a top speed exceeding 60 miles per hour and a comprehensive suite of amenities, the 343 stands out as one of the most luxurious high-performance sport boats currently available.
Overview from around the web 2005 Cobalt 343
Customers praise the 2005 Cobalt 343 for its stylish design, spacious and comfortable interior, and excellent performance on the water
Many highlight the boat’s smooth handling and powerful engine, making it ideal for both cruising and watersports. The quality craftsmanship and attention to detail in the finishes receive frequent compliments, as does the ample seating and storage capacity, which make it great for entertaining family and friends. Overall, owners appreciate the combination of luxury, functionality, and reliability that the 2005 Cobalt 343 offers.
The Biggest Pros and Cons
The 2005 Cobalt 343 is a popular luxury bowrider that offers a blend of performance, style, and comfort. Here are some pros and cons to consider:
Pros
Spacious Layout: The 343 features a roomy cockpit and bow seating area, making it great for entertaining and family outings.
Quality Construction: Known for solid build quality and attention to detail, providing durability and a premium feel.
Performance: Equipped with powerful engine options, the boat delivers strong acceleration and smooth handling.
Comfort and Amenities: Includes upscale features such as plush seating, a well-equipped helm, and optional swim platform with ladder for easy water access.
Storage: Ample storage compartments for gear, supplies, and personal items help keep the boat organized.
Cons
Fuel Consumption: With its larger engines and size, fuel efficiency can be lower compared to smaller boats.
Maintenance Costs: As a luxury vessel, maintenance and repairs can be more expensive over time.
Limited Overnight Accommodations: While spacious for day use, it lacks cabin space for comfortable overnight stays.
Weight and Trailerability: The boat’s size and weight may require a heavy-duty trailer and towing vehicle, which can be less convenient for frequent transport.
Made For
The 2005 Cobalt 343 is designed for boating enthusiasts who seek a perfect blend of luxury, performance, and versatility. Ideal for families and groups looking to enjoy comfortable day cruising, watersports, or entertaining on the water, this model offers spacious seating, high-quality craftsmanship, and reliable power. Whether you're hosting friends for a relaxing afternoon or exploring coastal waters, the Cobalt 343 provides a stylish and dependable experience for those who value both comfort and performance in a midsize sport boat.
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 2005 Cobalt 343 | |||||
|---|---|---|---|---|---|
| $97,500 | $99,500 | $69,500 | $68,000 | $39,900 | $39,900 |
| Pottsboro | Austin | Rockwall | Leander | Austin | Austin |
| 35' | 30' | 35' | 28' | 26' | 27' |
| 3' | - | - | - | - | - |
| MerCruiser | Volvo Pente | Mercury | Mercruiser | Volvo | Mercury Racing |
| 425 hp | 420 hp | 425 hp | 385 hp | 320 hp | 525 hp |
| 424 | 589 | 30 | 5 | 70 | 13 |
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Meet the Broker
Address
Boat Location
Contact Jobe Marine about 2005 Cobalt 343
10316 Nantucket Drive, Aubrey, TX, 76227
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