2005 Cobalt 343
$169,900
Boat in Lakeside Marblehead, OH 43440 US
Built in 2005
343
2 Engines (2x Mercury Racing)
35 feet
Gas
Fiberglass/Reinforced
New arrival!
Beautiful 343 Cobalt cruiser with mercury high performance 525 motors, and whipple superchargers. Available now at Marine Tech Concepts
Equipped with twin high-performance engines, this boat delivers impressive speed and acceleration, making it ideal for adrenaline-fueled adventures and watersports activities.
The 2005 Cobalt 343 is a sleek and powerful performance boat designed for thrill-seekers and boating enthusiasts. With its aggressive lines and sporty appearance, this vessel stands out on the water. Measuring at 34 feet and 3 inches in length, it offers a perfect balance between size and maneuverability.
The Cobalt 343 boasts a spacious and well-designed cockpit that comfortably accommodates several passengers. The high-quality upholstery and luxurious finishes enhance the overall comfort and elegance of the interior. Equipped with twin high-performance engines, this boat delivers impressive speed and acceleration, making it ideal for adrenaline-fueled adventures and watersports activities.
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 |
|---|---|---|
| 10/15/25 | Initial price | $169,900 |
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 consistently praise the 2005 Cobalt 343 for its exceptional performance, luxurious design, and spacious interior
Many boaters highlight the impressive handling and stability of the vessel, making for a smooth ride even in choppy waters. The spacious cockpit and comfortable seating arrangements are frequently mentioned as standout features, providing ample room for family and friends to relax and enjoy the day on the water. Users appreciate the high-quality materials and attention to detail throughout the boat, from the plush upholstery to the elegant finishes. The well-appointed cabin, complete with a private head, galley, and sleeping accommodations, receives positive feedback for its functionality and comfort. Owners often remark on the boat's ability to serve as both a weekend getaway and a day boat, offering the versatility needed for various boating activities. Additionally, the powerful engines and efficient performance draw compliments, particularly when it comes to cruising and watersports. Overall, the 2005 Cobalt 343 is celebrated for its blend of luxury, comfort, and performance, making it a favored choice among boating enthusiasts.
The Biggest Pros and Cons
2005 Cobalt 343: Pros and Cons
Pros
Luxury and Comfort: The Cobalt 343 is designed with an emphasis on comfort, featuring plush seating and ample space for passengers. Its stylish interior is equipped with high-quality materials, providing a refined boating experience.
Performance: With powerful engines and a well-constructed hull, the 343 delivers impressive performance on the water. The boat offers excellent handling, making it suitable for both leisurely cruising and more spirited outings.
Ample Storage: The design incorporates plenty of storage options, allowing for easy management of gear and personal items. This is particularly beneficial for longer outings where space is at a premium.
Versatile Layout: The cockpit and cabin layouts are versatile, accommodating both social gatherings and family time. The dual-console design allows for easy movement around the boat.
Quality Build: Cobalt is known for its craftsmanship, and the 343 is no exception. The boat’s construction reflects durability and longevity, making it a reliable choice for boaters.
Cons
Fuel Consumption: While the performance is commendable, the powerful engines can lead to higher fuel consumption compared to smaller boats. This could be a consideration for those who plan extended trips.
Size and Maneuverability: The 343's larger size can make it less maneuverable in tight spaces, such as small docks or marinas. This could be a challenge for some boaters, especially those who are less experienced.
Maintenance Costs: As a luxury boat, the Cobalt 343 may come with higher maintenance and repair costs, which is an important factor to consider for potential buyers.
Price Point: The initial investment may be higher than other boats in its class, which could deter budget-conscious buyers or those looking for more basic models.
Limited Offshore Capability: While suitable for day cruising and inland waters, the Cobalt 343 may not be the best option for serious offshore adventures due to its design focus primarily on leisure and comfort.
Made For
The 2005 Cobalt 343 is designed for those who seek a blend of luxury and performance on the water. Ideal for families and groups of friends, this boat offers ample space for entertaining and relaxation. With a capacity to accommodate up to 12 passengers, it’s perfect for weekend getaways, day cruising, or hosting gatherings on the water. This model caters to boating enthusiasts who appreciate high-quality craftsmanship and innovative features. Its powerful twin engines provide exhilarating speed and impressive handling, making it suitable for both leisurely cruises and adrenaline-fueled adventures. Additionally, the spacious cockpit and well-appointed cabin ensure comfort, with features such as plush seating and a fully equipped galley. Whether you’re an experienced boater or new to the world of yachting, the 2005 Cobalt 343 offers a versatile and enjoyable boating experience, making it the perfect choice for anyone looking to explore, entertain, and create lasting memories on the water.
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 2005 Cobalt 343 | |||||
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| $169,900 | $178,615 | $137,500 | $119,900 | $221,481 | $105,495 |
| Lakeside Marblehead | Peninsula | Monroe | Cleveland | Huron | Peninsula |
| 35' | 24' | 30' | 29' | 28' | 23' |
| 3' | - | - | - | - | - |
| Mercury Racing | - | Ilmor | Volvo Penta | - | - |
| 750 hp | - | 710 hp | 400 hp | - | - |
| 677 | 500 | 33 | 1 | 295 | 500 |
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Contact Marine Tech Concepts about 2005 Cobalt 343
7130 E Harbor Rd, Marblehead, OH, 43440
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