It's 6:15 a.m. on a Saturday. You're 40 miles offshore, watching the sunrise paint the horizon while your crew sleeps below in climate-controlled comfort. The quad Mercury Verados idle quietly. The coffee from the galley is still hot. In three hours, you'll be back at the dock with a full fishbox, and by sunset, you'll be anchored in a quiet cove with cocktails on the helm deck. This is the 405 Conquest's promise: you don't have to choose between fishing boat and family cruiser. You get both, executed at a level most builders can't touch in either category.
Who It's For
The 405 Conquest is built for the owner who refuses to compromise. You've outgrown the 30-foot center console but you're not ready for a 50-foot express with crew quarters. You want to run to the canyons on Friday, host friends for a weekend cruise on Saturday, and do it all without calling a captain or a diesel mechanic.
This boat makes sense for the experienced boater who values capability over flash. You understand that real reach comes from efficient hull design and smart fuel management, not just bigger tanks. You appreciate that a 13'6" beam gives you stability in a seaway and room to move when you're working fish. And you know that Boston Whaler's unsinkable construction isn't marketing — it's engineering that matters when you're 50 miles from help.
The ideal 405 owner operates the boat themselves but isn't opposed to hiring a captain for longer trips. You're comfortable with the fact that quad outboards mean a real service calendar, and you want a boat that can handle 4-foot seas without beating up your guests — and you're willing to pay for the build quality that makes that possible.
Design & Layout: Function Drives Form
The 405's layout is a masterclass in spatial efficiency. The dual-console configuration creates three distinct zones: a fishing-focused cockpit, a social helm deck, and a surprisingly spacious cabin. Each area works independently, but they flow together in a way that makes the boat feel larger than its 41-foot length suggests.
The cockpit is where the fishing happens. Twin insulated fishboxes flank the deck. The transom prep station includes a sink, cutting board, and storage — or you can option the summer kitchen package with a grill, refrigerator, and additional counter space. The livewell sits in the port corner. Rod holders are everywhere: transom, gunnels, and hardtop supports. This isn't a boat with fishing features added as an afterthought. It's a fishing platform that happens to have a cabin.
The helm deck is where the 405 separates itself from traditional center consoles. The starboard helm station includes space for dual 16-inch displays, upgradeable to larger screens. The port console features a convertible lounge that transforms from forward-facing seating to an aft-facing entertainment zone. Behind that, a wet bar with sink, refrigerator, and storage. The aft-facing mezzanine seat folds down to create additional prep space. It's a layout that works whether you're running offshore or hosting a raft-up.
Below deck, the cabin delivers more than you'd expect from a 41-footer. The master stateroom features an island berth with an innerspring mattress and electric backrest adjustment. The mid-berth sleeps three. The enclosed head includes a separate shower with rain head. The galley has a single-burner cooktop, microwave, and refrigerator, with teak flooring throughout. It's legitimate overnight capability for a family of four.
Performance: Speed Is Freedom
The 405 Conquest is rated from 1,200 to 1,800 horsepower: quad Mercury 300 V8 Verados standard, with quad 400 V10s or triple 600 V12s optional. With the triple 600 V12 package the boat has been recorded at 61.5 mph, cruising at 36.0 mph at 4,000 RPM — engine-package results rather than factory claims, and numbers that move with load, props and sea state.
But speed isn't the story here. Fuel is. With 620 gallons in the main tank plus a separate 38-gallon diesel tank for the generator, the 405 carries the reach to fish the canyons and the reserve to punch through weather on the way home. The generator running on its own diesel supply means air conditioning at anchor never eats into the fuel you need to get back.
The hull handles well in a seaway. Boston Whaler's modified-V design with 19 degrees of deadrise at the transom provides a soft ride without sacrificing stability. The boat tracks straight at speed and turns predictably in tight maneuvers. Joystick piloting makes close-quarters maneuvering straightforward even for less experienced operators.
Trim tabs are electric with Auto Glide and Dynamic Running Surface technology. The system adjusts automatically to maintain optimal running attitude. It's one less thing to think about when you're running in following seas or dealing with uneven loading.
Ownership Conversation
Four outboards mean four of everything at service time, and a boat with a generator, gyro option and air conditioning deserves a good relationship with a good yard. What it doesn't need is crew. The 405 is designed to be run by the person who owns it — joystick docking, integrated systems, and a layout one couple can manage on a week-long trip.
Sea trial the engine packages loaded the way you'll actually cruise, and get the observed numbers in writing. The right configuration depends on how far you run and how many people you carry, not on the biggest number on the spec sheet.
Where to Start
The 405 Conquest is the boat for the owner who wants one platform that fishes seriously, cruises comfortably, and does both without staff. If that's your program, this is where the conversation starts.
Explore full specifications at YachtSpecsDirect.com
Browse available Boston Whaler inventory at mintedyachts.com/boston-whaler