2025 Boston Whaler 405 CONQUEST Boat in Saint Petersburg, FL 33707 US
Built in 2025
405 CONQUEST
4 Engines (4x MERCURY)
41 feet
Gas
Fiberglass/Reinforced
MarineMax Yachts is proud to present MA BELLE, an exceptionally well-equipped, like-new 2025 Boston Whaler 405 Conquest, powered by quad Mercury V10 400 Verado outboards.
The Boston Whaler 405 Conquest is the flagship of Whaler's Conquest lineup, combining serious offshore capability with the comfort, accommodations, and amenities of a luxury cruising yacht. At over 40 feet, the 405 offers an impressive amount of usable space, including a climate-controlled pilothouse, spacious cockpit, well-appointed cabin, full galley, overnight accommodations, and multiple entertaining areas. Whether the goal is offshore fishing, extended cruising, entertaining family and friends, or spending weekends aboard, the 405 Conquest is designed to do it all while delivering the unsinkable construction and quality Boston Whaler is known for.
MA BELLE has just over 63 hours and shows like new. In addition to an extensive factory option list, the current owner has made several significant upgrades that separate this 405 from others on the market, including FLIR night vision, Starlink connectivity, and a Platinum Marine Service Protection Plan covering eligible boat components through 06/24/2033. This provides the next owner with an exceptional level of coverage and peace of mind for years to come.
Notable Options & Equipment
- A total of 1,600 horsepower provides the 405 Conquest with impressive performance while Mercury's V10 platform delivers smooth, quiet operation and excellent low-speed control.Quad Mercury V10 400 Verado Outboards
- Includes joystick docking, integrated autopilot, and Skyhook digital anchoring, making maneuvering this 40-foot-plus boat remarkably easy around docks, marinas, bridges, and other tight spaces.Mercury Joystick Piloting
- Provides an additional level of control when docking or maneuvering in wind and current.Bow Thruster
- Dramatically reduces boat roll, adding another level of comfort while offshore, drifting, fishing, entertaining, or spending time at anchor.Seakeeper 6 Gyroscopic Stabilizer - Approx. $111,000 Option
- Gives the cabin and interior accommodations a warm, upscale yacht-quality appearance.Premium Rosewood Interior
- A substantial factory upgrade providing convenient chilled storage directly in the cockpit.Chiller Cooler Under Port Aft Seat - Approx. $31,000 Option
- One of the highlights of MA BELLE's equipment list, featuring:Extensive Simrad Electronics Package - $60,000+ Package
- Twin 19" Simrad multifunction displays at the helm
- Massive 24" Simrad multifunction display for the co-captain
- 48" Simrad HALO Open Array Radar
- Simrad VHF
- Integrated navigation and vessel information
- A valuable owner-added upgrade that provides enhanced visibility and situational awareness when operating at night or in low-light conditions.FLIR Thermal Imaging Camera
- Owner-added satellite connectivity provides high-speed internet capability while cruising and spending extended time aboard.Starlink
- Multiple audio zones throughout the boat provide premium sound whether you're relaxing in the cabin, entertaining in the pilothouse, or enjoying the cockpit.Full JL Audio Premium Sound System
- Provides substantial onboard power for the boat's extensive electrical systems, climate control, galley equipment, refrigeration, and other amenities while away from shore power.15kW Diesel Generator
- Features a power-operated aft shade along with a manual forward bow shade, creating comfortable shaded entertaining areas throughout the boat.Bow & Stern Sunshades
- Extensive Refrigeration
- Top-loading freezer in the cabin
- Two refrigerators in the pilothouse
- Additional refrigerator below
- One cooktop is conveniently located in the pilothouse with a second cooktop in the lower galley, giving owners multiple options for meal preparation aboard.Dual Kenyon Cooktops
- Integrated into a cockpit drawer for convenient outdoor grilling and entertaining.Pull-Out Kenyon Cockpit Grill
- Ready for serious offshore fishing and deep-dropping equipment.Electric Reel Outlets
- Provides impressive nighttime ambiance while also improving visibility around the boat after dark.Underwater & Courtesy Lighting Throughout
- Significant long-term protection on eligible components of the vessel, providing added confidence and peace of mind to the next owner.Platinum Marine Service Protection Through 06/24/2033
A Standout 405 Conquest
With only 63+ hours, quad V10 400 Verados, Seakeeper 6, an extensive Simrad electronics package, joystick piloting, bow thruster, FLIR, Starlink, upgraded refrigeration, generator, premium audio, and long-term component protection, MA BELLE represents an exceptional opportunity for someone looking for a highly optioned 405 Conquest without the wait associated with ordering a new boat.
The combination of offshore capability, fishing features, luxury accommodations, technology, and entertaining space makes the Boston Whaler 405 Conquest one of the most versatile boats in its class.
A FULL FACTORY OPTION AND EQUIPMENT LIST IS AVAILABLE BY REQUEST.
MA BELLE is located at MarineMax in St. Petersburg, Florida.
Please reach out with any questions, additional specifications, or to schedule a private showing of MA BELLE.
Price History
| Date | Event | Price |
|---|---|---|
| 8/19/26 | Initial price | $1,299,999 |
Boston Whaler 405 CONQUEST: BoatTEST Review
Overview
The Boston Whaler 405 Conquest represents the largest model in the Conquest lineup, designed with versatility in mind to accommodate families who enjoy both fishing and cruising. This model offers customizable features that cater to a dual-purpose lifestyle, blending comfort and functionality seamlessly.
Cockpit and Exterior Features
The cockpit of the 405 Conquest measures 11 feet 3 inches wide by 6 feet 6 inches fore and aft, offering a spacious and adaptable area. The standard layout includes a flip bench seat at the stern, while an optional summer kitchen replaces this with an electric grill, stainless steel rail, drawer-style refrigerator, sink, and multiple beverage holders. Storage is thoughtfully integrated, including dedicated spaces for a five-gallon bucket and cockpit tables, which Boston Whaler terms 'point-of-use storage.' For anglers, an optional aquarium live well can substitute the summer kitchen, with kitchen features relocated forward under the lounge. Additional fishing amenities include a 19-gallon live well in the aft port corner, rod holders, hawse pipes, racks for downrigger balls, and a first-in-class port side hull dive door with a heavy-duty stainless steel latch for hauling large fish or launching divers. The cockpit also features low-pressure glycol-filled cooling tubes for the 290-quart fish boxes, enhancing ice retention. Comfort and convenience are addressed with an optional 7-foot long sure shade, multiple rod holders on the hardtop, aft-facing lounge seats with beverage holders, a cooler with dual access, a pull-out shower, and wide passageways with secure rails leading to the foredeck. The foredeck itself boasts a 70-inch long by 58-inch wide sun pad with adjustable headrests, cup holders, grab rails, stereo speakers, and USB plugs.
Helm and Cockpit Galley
Access from the cockpit to the helm deck is facilitated by 9-inch tall steps with a 28-inch wide space between seats. The helm features a single-person seat that slides on a power base, with armrests and bolsters that fold up and a swivel function allowing the captain to engage socially when docked. The cockpit galley includes a Corian countertop, a single Kenyan burner, a sink with a fold-up faucet and removable cover, along with ample storage through drawers, cabinets, and a drawer-style refrigerator. The helm windshield is equipped with Boston Whaler's patented power vents and offers an optional full glass configuration. Additional features include overhead spreader lights, outrigger handles, speakers, courtesy lights, and a soft zipper pocket for storing the cockpit enclosure. An optional power skylight replaces standard hatches to enhance natural light.
Interior Living Spaces
The cabin provides six feet two inches of headroom and begins with a private bow stateroom, a highly requested feature in this size class. The sliding cabin hatch is uniquely designed with an articulating lower section to accommodate the hull's V-shape, a patented innovation by Boston Whaler. The bow berth, centered on the boat's axis, measures 80 inches long by 58 inches wide, with steps on either side. It includes adjustable head positioning for reclining to watch a 24-inch TV and stereo system located aft to port. Storage is abundant, with a cedar-lined hanging locker to starboard, a cedar-finished closet with shelves to port, and a large berth base that opens on gas struts for storing sizable items such as a life raft or luggage. A Dyson vacuum cleaner is standard and stored in the bow locker.
Heads and Additional Cabin Features
The private head compartment is accessible both from the master stateroom and the salon, featuring a separate shower area with a rainfall showerhead and a pull-up wand. The showerhead is designed to be recessed into the overhead in future models. The head also includes a vessel sink with Corian countertops, a skylight, and an opening port for ventilation. The salon area benefits from overhead skylights and hull-side windows that provide ample natural light. The dinette table folds to allow easy access and lowers to create additional sleeping space suitable for one adult or two children. Entertainment is supported by a stereo and a 32-inch TV, while controls for cooling, fish boxes, water maker, Sea Keeper, TV antenna gain, and air conditioning are discreetly housed behind overhead cabinet doors.
Galley and Aft Cabin
Located to port of the cabin steps, the galley is equipped with a single burner stove and a sink set in a Corian countertop, complemented by overhead storage and glass and beverage holders. Below the sink, an Isotherm refrigerator and a wastebasket are integrated. Above the galley, a cedar-lined locker offers additional storage with various shelves and compartments. The aft cabin features an 82 by 55 inch mattress that raises on a power assembly to reveal substantial storage beneath. Optional overhead racks can accommodate up to six fishing rods, enhancing the boat's utility for anglers.
Conclusion
The Boston Whaler 405 Conquest combines versatile cockpit and helm deck arrangements with comfortable and well-appointed interior accommodations, making it well-suited for family adventures on the water. Its thoughtful design caters equally to fishing enthusiasts and cruising families, while performance capabilities with Quad 400 Mercury outboards are detailed in a separate review. Overall, the 405 Conquest exemplifies Boston Whaler's commitment to quality, innovation, and multifunctional use.
Overview from around the web 2025 Boston Whaler 405 CONQUEST
Customers are raving about the 2025 Boston Whaler 405 CONQUEST for its impressive blend of luxury, performance, and versatility
Many appreciate the spacious cabin that offers comfortable accommodations for family and friends, making it perfect for both day trips and extended excursions. The thoughtfully designed cockpit provides ample space for fishing or entertaining, with features like a well-equipped galley and inviting seating areas. The boat's cutting-edge technology, including advanced navigation systems and powerful engines, has garnered positive feedback, with users praising its smooth handling and impressive speed on the water. The sturdy construction and stable ride are often highlighted, giving owners peace of mind whether cruising the coast or venturing into open waters. Overall, the Boston Whaler 405 CONQUEST has become a favorite among boating enthusiasts who value functionality without sacrificing comfort, making it a top choice for both leisure and adventure.
The Biggest Pros and Cons
Pros
Unmatched Stability: The Boston Whaler 405 CONQUEST is renowned for its superior stability on the water, thanks to its innovative hull design. This stability provides a comfortable ride even in rough seas.
Versatile Performance: Equipped with powerful outboard engines, the 405 CONQUEST delivers impressive speed and agility, making it suitable for both leisure cruising and serious fishing excursions.
Spacious Interior: The design features a well-appointed interior with ample space for family and friends. The cabin includes comfortable seating, a fully equipped galley, and a private head, enhancing the overall onboard experience.
Advanced Technology: Featuring state-of-the-art navigation and fishing equipment, this model comes complete with cutting-edge electronics and a user-friendly interface, making it easy for both seasoned mariners and newcomers alike.
Exceptional Build Quality: Boston Whaler is known for its durable construction and quality materials. The 405 CONQUEST is no exception, designed to withstand the rigors of the marine environment and provide peace of mind.
Fishability: With ample rod storage, spacious fishing platforms, and built-in live wells, the 405 CONQUEST is engineered for serious anglers who value functionality and fishing efficiency.
Cons
Cost: As a high-performance vessel, the 405 CONQUEST comes with a premium price tag, which may be a barrier for some boaters looking for a more budget-friendly option.
Size and Weight: While the size contributes to its stability and comfort, it may also pose challenges in terms of trailering and docking for less experienced boaters.
Fuel Consumption: With its powerful engines and larger size, fuel consumption can be higher compared to smaller boats, which may be a consideration for long-distance cruisers or those on a budget.
Maintenance: As with any high-performance boat, maintenance can be more demanding. Keeping up with the care and servicing of engines and equipment is essential to maintain optimal performance.
Limited Speed Under Heavy Load: While it has excellent power, the boat's performance may slightly diminish when loaded to capacity, which is something to consider for those planning extensive trips with a full complement of gear and passengers.
Made For
The 2025 Boston Whaler 405 CONQUEST is designed for discerning boaters who seek the ultimate blend of luxury, performance, and versatility on the water. This model is perfect for adventure enthusiasts, families, and weekend cruisers alike. Whether you're a seasoned angler looking to explore remote fishing spots, a family eager for memorable outings, or a couple wanting a stylish coastal escape, the 405 CONQUEST caters to all. Equipped with powerful outboard engines, this boat offers impressive speed and reliability, making it ideal for those who enjoy both leisure cruising and spirited outings. The spacious and well-designed cockpit provides ample room for fishing, entertaining, or simply soaking up the sun. With comfortable seating options and a fully-equipped galley, the 405 CONQUEST is perfect for social gatherings or cozy family trips. Additionally, the innovative features and cutting-edge technology ensure a safe and enjoyable experience, whether navigating through choppy waters or anchoring in serene bays. Ideal for boaters who value both comfort and capability, the 2025 Boston Whaler 405 CONQUEST is a true embodiment of quality craftsmanship, ready to elevate your time on the water.
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 2025 Boston Whaler 405 CONQUEST | ||||||
|---|---|---|---|---|---|---|
| Price | $1,299,999 | $1,145,703 | $1,550,000 | $1,025,000 | $949,900 | $899,000 |
| Location | Saint Petersburg | Miami | Fort Pierce | Naples | Sarasota | Saint Petersburg |
| Nominal Length | 41' | 40' | 40' | 36' | 41' | 40' |
| Engine Make | MERCURY | - | Mercury | MERCURY | MERCURY | Mercury |
| Total Engine Power | 400 hp | - | 600 hp | 400 hp | 600 hp | 300 hp |
| Days on Market | 1 | 55 | 1402 | 75 | 79 | 97 |
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Contact MarineMax St. Petersburg about 2025 Boston Whaler 405 CONQUEST
St Petersburg, FL, 33707
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