New Boats

2024 Boston Whaler 405 Conquest




405 Conquest

Generic Type (Primary)

Cabin Cruiser
41′ 4″


Boat Details

Introducing the 405 Conquest, aka the SUV of the Sea. Envisioned from the keel up as an adventure-ready cruiser, the 405 delivers incredible performance, versatility and ease of use. From the robust bow lounge area, to the ultra-convertible helm companion zone, to the inviting cabin with master and two guest sleeping quarters, the 405 brings new sophistication and luxury to the Conquest series. Enjoy long-distance cruises and overnight stays, chase gamefish far offshore, or host an impromptu gathering: With the 405 Conquest, you never have to choose between gracious comfort and exceptional capability. For more details on the 405 Conquest®, request information online, give us a call at (305) 564-9747, or visit our Islamorada, Florida Boston Whaler dealer headquarters.


• All hardware 316-L Stainless Steel
• All rails welded 316-L Stainless Steel
• Vinylester barrier coat over entire hull and hull sides

Deck & Cockpit

• 10” stainless steel cleats – stern cockpit with gunnel boats hawse pipe (2), anchor locker (1)10” stainless steel pull-up cleats – bow (2), spring line (2), crosstie cleats at transom (2)
• 27” interior freeboard
• Acrylic transom door with stainless steel latch
• Anchor windlass with 400’ rode and chain (handheld remote control, stainless steel swivel, polished stainless steel 44lb anchor, polished stainless steel bow roller davit)
• Boarding ladder at transomBow eye (heavy duty polished stainless steel)
• Chrome Boston Whaler logo/model designator
• Coaming bolsters (cockpit)
• Dive door (molded fiberglass boarding door on port side with removable stainless-steel dive ladder with dedicated storage in stern seat)
• Drink holders (stainless steel) (4 in bow, 2 in hawse pipes, 2 at helm, 2 at port console, 2 at port lounge, 2 per side in recessed pockets at aft helm deck seats)
• Lighting – LED courtesy lights in cockpit (multi-color)
• Livewell (19-gallon) (pressurized insulated in aft port corner with clear lid, blue interior and dual white LED lights)
• Rails – hand rails (welded stainless steel) (companion way to helm deck and into cabin, boarding ladders and prep station)
• Rails – high bow rails (welded stainless steel)
• Rails – rub rail (white with stainless steel insert) (heavy-duty)
• Rails – toe rails (cockpit) (stainless steel) (under gunnel storage shelf with downrigger weight holders – 1 per side)
• Rod holders (gunnel-mounted) (3 aft cockpit starboard) (2 port)
• Rod holders (transom-mounted) (5)
• Rod holders (under gunnel) (2 starboard)
• Self-bailing cockpit sole
• Shower (freshwater with hot and cold water) (near dive door)
• Shower (freshwater with hot and cold water) (near transom door)
• Spotlight (ACR RCL-75) (mounted on hardtop)


• A/C unit (12K BTU) (with 2 vents on dash and seating area vent)
• Acrylic/glass dash
• Drink holders – stainless steel (2)
• Dual helm seat with arm rests that convert to create a large sun lounge area
• Rail – grab handleStereo remote control – Bluetooth remote
• Storage – glovebox style with (1) dual USB and white LED light
• Storage recess on top of dash with (1) dual USB and (1) 12v wireless cell phone charging holder
• Table – teak (high gloss with polished stainless-steel inlay, aft lounge area with electric high low conversion)


• Bow lounge with dual row tilt up backrests (includes canvas cover)
• Foldaway stern bench seat with elevated backrest
• Helm seat (fore and aft electrical adjustment with swivel)
• Port aft facing seat (2-person seat that can convert to a lounge/filler cushion over the lowered table)
• Port console seat (2-person, forward facing with innovative mechanism to convert to an aft facing lounge)
• Port forward facing seat (2-person seat with conversion seatback for aft facing mezzanine seat)
• Starboard aft facing (2-person mezzanine seat that folds down providing a countertop at the prep station)


• 300 V8 DTS Black Quad Mercury Verado four
• Strokes with Joystick Piloting; outboard docking system with joystick, electronic steering, Skyhook/autopilot keypad and functionality (91 octane fuel recommended)
• Battery trays for (4) group 31 engine batteries with advanced battery management system and in-cabin electric switches and charging relays with remote paralleling
• Bilge pump – high water bilge pump with alarm (2000 GPH)
• Bilge pumps – automatic (300 GPH forward, 2000 GPH aft)
• Engine fuel / water separators (4)
• Freshwater pullout hot and cold shower (2) located at dive door and transom door
• Freshwater washdown – stainless steel faucet located in cockpitGenerator (diesel 12kW Fischer Panda) – 240-V 60 Hz with fire suppression system, automatic with manual override
• Horn – electric dual polished stainless-steel trumpet hornsInlet – 50-amp shore power inlet with battery chargers, isolation transformer and 50’ shore power cordInlet – dockside cable TV inlet with low profile digital antenna on hardtop and boost control in cabin
• Lighting – LED cockpit and machinery space lighting
• Propellers (stainless steel)
• Raw-water washdown – stainless steel faucet located in cockpit
• Switch panel – livewell pump/lighting and fish boxes
• Thru hulls – bonding system for underwater thru hull fittings
• Thru hulls – cast bronze thru hulls (below waterline)
• Thru hulls – cast stainless steel thru hulls (above waterline)
• Transducer pocket in hull bottom for flush mounting a B275 transducer
• Trim tabs – recessed electric trim tabs with indicators (Auto Glide, Dynamic Running Surface, dual ram)

Cabin Interior

• 120-V receptacle
• Air-conditioning vents from main cabin (16,000 BTU unit)
• Carbon monoxide detector
• Flooring and entry steps – solid teak with satin finish
• Lighting – LED reading lights (2)Lighting – LED RGB diffused courtesy lighting with dimmer control
• Lighting – LED white overhead lights with dimmer switches (1 in main area, 2 in bed area)
• Mattress – 6” thick Premium Handcraft® pillowtop innerspring with hinged access to storage
• Privacy curtain
• Storage – hanging locker (cedar lined) with removable shelves and galley dish storage with door activated light
• Storage – large storage compartment under the mattress with a powered access hatch, providing easy access to storage drawers and large molded in fiberglass trunk
• Vimar single USB receptacle
• Mid berth comes with fitted sheet, comforter and two regular size pillowcases

Cockpit Utilities Center

Leaning Post


• 120-V receptacle
• Cabinet – overhead with AC and DC vessel system controls
• Cabinet storage – behind sink providing additional storage for galley supplies
• Cabinet storage – for dishes
• Cabinets – teak wood, satin finish with maple lining located under counter and over galley
• Cooktop burner (single)
• Countertop with faucet and undermount sink (solid surface)
• Lighting – LED RGB courtesy lighting under overhead cabinet and countertop with dimmer control
• Lighting – LED white light overhead (1)
• Microwave – in overhead cabinet
• Pullout out waste receptacle in cabinet under galley counter
• Rail – handrail (stainless steel)
• Refrigerator/freezer – drawer, stainless steel 12-V/120-V (3.0 cubic feet) CR85
• Sink filler – solid surface matching countertop with integral cutting board
• Wine glass holders underside of cabinet with lighting (6)


• Bilge – aft mechanical space, large storage tray (deleted with gyro) • Cabin main – cabinets above starboard settee • Cabin main – in-floor storage compartment • Cabin main – storage under starboard settee • Cockpit – downrigger weight holders (2) • Cockpit – insulated 220qt built-in cooler/storage under seating with dual access • Cockpit – rod holders under starboard gunnel (2) (deleted with foldout bench seat option) • Cockpit – storage below pullout grill • Fishboxes – insulated in-deck with pump-out (2) (290 quarts each) • Guest mid-berth – large storage compartment under berth with pull out drawers • Guest mid-berth – port side cedar lined hanging locker with removable shelves, dish storage and light • Guest mid-berth – port side storage under hinged countertop • Head – storage cabinet under sink and overhead • Helm deck – portside console glovebox and forward storage tray • Helm deck – starboard helm storage drawers and forward storage tray • Helm deck – starboard wet bar storage drawers and storage compartment • Master stateroom forward – large storage compartment under berth • Master stateroom forward – port and starboard upper side cabinets forward • Master stateroom forward – port side vertical cabinet with shelves and light • Master stateroom forward – starboard side cedar-lined hanging locker with light



• L.O.A.: 41’ 4” (12.60m)
• Beam: 13′ 6″ (4.11m)
• Bridge Clearance (with hardtop and upper station): 20’ 9” (6.32 m)
• Bridge Clearance (with hardtop): 10’ 5” (3.18 m)
• Bridge Clearance (with hardtop, radar and satellite TV): 14’ 8” (4.47 m)
• Draft: 30″ (0.76 m)
• Transom Height: 30” (0.76 m)


• 20 Persons Capacity
• Fuel Capacity (Diesel Generator): 38 gallons (144 L)
• Fuel Capacity: 620 gallons (2,347 L)
• Maximum Weight Capacity: 6,922 lbs. (3,140 kg))
• Swamped Capacity: 4,050 lbs. (1,837 kg)
• Waste Capacity: 30 gallons (113.6 L)
• Water Capacity: 90 gallons (340.7 L)


• Weight (dry, no engine): 22,400 lbs (10,160 kg)
• Weight (with engines, fuel and water): 30,360 lbs (17,853 kg)


• Maximum Horsepower: 1800 HP (1342 kW)
• Maximum Engine Weight: 4,050 lbs. (1,837 kg)
• Minimum Horsepower: 1,200 HP (895 kW)


• Cabin features private master stateroom and two guest sleeping quarters, an enclosed head with separate shower, a convenient galley and more
• Full-beam single-piece windshield with optional full side glass for unobstructed visibility and a closer sense of connection with the water
• Quad 300-hp Mercury Verado® engines with standard Joystick Piloting provide impressive power and control
• Highly customizable transom prep area with multiple fishing and entertaining options
• Unique portside companion lounge with hidden table converts to multiple positions
• Luxury touches throughout include a rain shower, innerspring mattresses, Corian countertops and premium finishes
• Available with Seakeeper gyro-stabilizing system

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