Inverse Entropy - Marquis FOR SALE

2009 Marquis 500 Sport Coupe

Sleek, purposeful, and unmistakably luxurious, this United States–built Marquis 500 Sport Coupe blends modern style with confident performance in a way few yachts can match. At 50 feet overall with a broad 15-foot beam, her semi-displacement form delivers a poised, quiet ride and rewarding handling, equally at home dashing between harbors or settling into a sunset anchorage.

Power comes from twin Volvo Penta diesel inboards, providing the effortless surge and low-vibration refinement that define premium cruising. Settle into a fast, comfortable passage at approximately 27 knots, or call on a spirited 31-knot sprint when the moment demands. With 506 gallons of fuel on board, the yacht offers reassuring range for extended weekends and ambitious coastal itineraries.

Crafted in fiberglass composite with a fiberglass deck, the 500 Sport Coupe showcases the clean lines and timeless proportions that made Marquis a benchmark in the category. The profile is low and athletic, yet every inch is sculpted for real-world use: generous walkways, secure sightlines, and an inviting cockpit designed for entertaining. Large panes of glass flood the interior with daylight, creating a seamless flow between cockpit and salon that feels both expansive and intimately private.

Step inside to discover a refined, warm atmosphere where premium materials and thoughtful detailing elevate every moment onboard. The salon offers an inviting social hub—equally suited to hosting friends or sinking into a peaceful morning at anchor—while the well-appointed galley makes casual dining a pleasure. Private accommodations below are complemented by two heads, ensuring comfort and convenience for owners and guests alike. With 160 gallons of fresh water, life aboard remains easy and indulgent on longer stays.

This 2009 Marquis 500 Sport Coupe is a compelling choice for owners seeking a sophisticated, performance-minded motor yacht that refuses to compromise on livability. Elegant, agile, and beautifully finished, she captures the essence of a true sport yacht—designed to be driven, and destined to be enjoyed.

Category keywords: Sport Coupe, Express Cruiser, Motor Yacht, Luxury Yacht, Performance Cruiser, Semi-Displacement, Fiberglass, Diesel Inboard, Volvo Penta, US-Built.

Main descripition

Best priced and best equipped among its peers, this Marquis 500 Sport Coupe distills the luxury detailing and premium build quality you expect from Nuvolari Lenard in Venice, their superyacht sensibility turning every line into an undeniable head‑turner. Rare performance and ride quality are matched by provenance: Inverse Entropy shows only 685 hours on triple Volvo IPS 600s, running confidently in the mid‑20‑knot range and reaching 34 knots on the pins—an impressive achievement for a twenty‑six‑ton yacht. The forward‑thinking “galley‑up” layout unites an expansive social main deck with true al‑fresco versatility; open the glass salon doors and the moonroof and the interior fuses with the cockpit, which extends at the touch of a rocker switch via an electric aft bench to enlarge the outdoor entertaining space. Below, natural light flows through three staterooms and two heads, where Italian high design from Nuvolari Lenard meets third‑generation German master carpentry crafted in Wisconsin to create a refined, modern atmosphere.

This stunning 2009 Marquis 50SC lived in freshwater for over a decade and has been stored in an indoor climate‑controlled facility. Over the last two years she underwent a comprehensive refit that elevated her into an ultra‑luxury yacht with today’s most desirable amenities. Electronics, air conditioning, refrigeration, upholstery, flooring, lighting, entertainment, furnishings, and even the outdoor canvas were all modernized. The salon and companion spaces now feature rare Wenge hardwood flooring; diamond‑stitched upholstery in a rich two‑tone ivory and caramel palette; fine Italian linens; and Ernest Hemingway collection Serengeti chairs. This year brought a highly efficient Dometic dual‑drawer refrigerator for the galley and a stainless‑steel refrigerator in the salon, along with an updated Dometic electric roof blind system. Two new Next‑Generation air‑conditioning units were installed in the main salon for powerful, quiet climate control.

At the helm, a pair of Garmin 8616 chartplotters are recessed in a custom flush‑glass enclosure and are joined by CHIRP sonar, an open‑array radar, a Sionyx Nightwave Ultra Low‑Light marine camera, Garmin Cortex HF/AIS with collision avoidance and anchor monitoring, and a premium Italian Gussi steering wheel that completes the modernized aesthetic. A Dockmate system, added this year, enables joystick control from a lanyard worn by the captain on or off the yacht. Fore and aft cameras deliver 360‑degree contact monitoring and superb visibility through the salon’s generous glass. New flat‑screen displays in every cabin mirror the chartplotter feed so navigation and anchorage data can be followed from any berth. A latest‑generation STARLINK satellite system with a wireless router provides high‑speed internet anywhere aboard. All inboard lighting has been upgraded to energy‑efficient soft‑white LEDs, with color‑selectable accent lighting controllable through the Garmin chartplotters or a phone via the Poco app. Outside, fully refinished teak decks, all‑new canvas, and a new Yachtline 360 tender painted to match and mounted on the hydraulic aft swim platform make every voyage effortless and enjoyable.

With triple IPS 600s producing a combined 1305 hp and modernized hull and steering control units, this three‑stateroom, two‑head yacht has the legs to cruise in remarkable comfort and style over substantial distances, achieving ranges of more than 1000 miles on a single fueling. The result is an exceptionally complete, beautifully curated Marquis 500 Sport Coupe that looks, feels, and performs like a far newer build.

Vessel features and construction

The Marquis 500 Sport Coupe is the product of a transatlantic alliance between Italy’s Nuvolari‑Lenard naval architects and one of America’s foremost premium yacht builders, yielding a trend‑setting sport coupe whose styling, quality, and performance stand out in any port worldwide. Propulsion is via three Volvo diesel engines with innovative IPS drives for exhilarating performance; with the IPS joystick, docking and close‑quarters maneuvering this 50‑foot yacht is effortless. Nuvolari‑Lenard’s mega‑yacht pedigree is unmistakable throughout the interior: Zebrano‑inspired cabinetry and Brazilian cherry soles have been elevated to rare Wenge wood, while designer fixtures distinguish the yacht far beyond typical express‑style offerings. For those who truly live on the water, there is enormous value in having the cockpit, salon, helm, and galley on a single level—seamless, social, and sunlit. Like all from this marque, the 500 Sport Coupe is certified to CE‑Class A, meeting the European Union’s highest standards for confident use on any waters worldwide.

Construction is resolutely yacht‑grade. Cherry wood cabinetry and trim receive a Marquis high‑gloss jewel finish of multiple hand‑buffed coats. The structural grid employs a fiberglass hat‑section stringer system, with fiberglass structural stringers reinforced by laminated aluminum plates. Hand‑laid, molded fiberglass components feature composite‑laminate hull sides, decks, and cabin tops, while the hull bottom is solid fiberglass laminate with Knytex substrates and a vinyl‑ester barrier coat. Tinted, tempered safety glass windows are frameless for a crisp, modern look, and the unitized deck, cockpit, and cabin‑top structure is strengthened by integral aluminum truss reinforcement in the cabin top.

Engine details and mechanical equipment

This yacht’s mechanical pedigree is comprehensive and meticulously specified. Climate control is delivered by a four‑zone, 48,000 BTU self‑contained system with reverse‑cycle heat, allocating 8,000 BTU to the master stateroom and heads, two 16,000 BTU units to the dinette and salon, and 8,000 BTU to the guest staterooms. Volvo IPS engines employ electric fly‑by‑wire steering, while a generator exhaust muffler and fresh‑water cooling for the engines underscore refined engineering. Fuel is carried in welded, baffled 5052 aluminum tanks; internal seawater strainers defend vital systems; and Lectrotab trim tabs with four stainless‑steel flat planes fine‑tune running attitude.

The engine room is designed for serviceability and silence, accessed by a dedicated ladder and featuring bilges finished in white, low‑VOC gelcoat for a clean look and easy maintenance. Forced‑air blowers ventilate the space, and a diamond‑plate aluminum catwalk aids access. Safety is paramount with an automatic/manual FE241 fire‑suppression system (FM200 in the European Community) that also triggers automatic engine and generator shutdown. Full structural bulkheads are laminated to the hull sides and stringers; acoustical and thermal insulation is integrated into the laminate; and overhead fluorescent lighting is controlled from the cockpit.

Electrical systems meet or exceed ABYC standards. AC/DC distribution panels use magnetic circuit breakers and integrate generator and bilge‑blower controls, supported by AC voltmeter and ammeter plus DC voltmeter and ammeter. Starting power comes from three 31‑series Deka Marine batteries rated at 950 cold‑cranking amps, with a 205‑minute reserve at a 23‑amp draw and a 100 amp‑hour rating, one per engine. House and generator needs are served by three dedicated 31‑series Deka Marine deep‑cycle 12‑volt batteries rated at 950 cold‑cranking amps, with a 225‑minute reserve at a 23‑amp draw and a 105 amp‑hour rating—two for ship service and one for the generator. Charging is handled by a 20‑amp charger for engine batteries and a 60‑amp charger for ship service and the generator. There are on/off battery switches for the three engines, one ship‑service switch, and one generator switch. Shore interfaces include a CATV dockside inlet with a 50‑foot white cord, Marinco dual 240‑volt/50‑amp shore‑power cords (230‑volt/32‑amp internationally) also at 50‑foot length, and dual 240‑volt/50‑amp (230‑volt/32‑amp internationally) connectors. Wiring is tinned, harnessed, color‑coded, and labeled to professional standards.

Water and waste systems are equally robust. Fresh water is stored in polyethylene tanks and monitored by a tank‑level sensor. All below‑waterline gray‑water drainage is managed by an automatic/manual gray‑water sump pump. The Shurflo fresh‑water system uses a variable‑speed Smart Sensor pump with a 4.5 gallons‑per‑minute flow rate and a high‑flow filter, complemented by a shore‑water connection with a pressure‑reduction valve and state‑of‑the‑art Shurflo plumbing throughout. At the transom, a hot‑and‑cold fresh‑water hand shower adds convenience. Waste holding tanks have filtered vents and dockside pump‑out, with the port tank serving the guest head and the starboard tank serving the master head; a waste‑tank level monitor provides status at a glance. Water and waste lines are constructed of cross‑linked polyethylene for durability. Hot water is supplied by an 11‑gallon (42‑liter) water heater. A Kohler generator rated at 15.5 kW/60 Hz (13 kW/50 Hz) with sound shield shows approximately 600 hours.

Vessel details

Deck and seamanship details reflect careful engineering and thoughtful use. A stainless‑steel over‑the‑stem anchor roller with nylon rollers feeds ground tackle cleanly, protected by a stainless bow chafe plate. The bow rail is a 1 1/4‑inch (32 mm) O.D. lineal‑buffed welded stainless perimeter with an additional 1/2‑inch (13 mm) intermediate rail amidships and forward, and 1‑inch (2.5 cm) stainless stanchions anchored to aluminum backing plates laminated into the deck. Twelve‑inch stainless‑steel cleats—one at the anchor, two at the bow, two at the stern, and four spring cleats—are through‑bolted to structural aluminum backing plates. Tinted plexiglass deck portlights to port and starboard on the foredeck, a molded forward toe‑rail, a 1‑inch stainless grab rail running the cabin length above the windows and windshield, a heavy‑duty 2‑inch 316L stainless rub‑rail insert, and black‑mesh windshield weather covers round out the foredeck package.

Safety and navigation systems are robust. Underwater thru‑hulls use 65‑5‑5‑5 marine‑grade bronze seacocks. Active corrosion protection for the Volvo IPS replaces traditional zincs, provides triple‑redundant protection, integrates with EVC displays, and continuously monitors and adjusts potential voltage in the surrounding water. Automatic engine synchronization simplifies control. Battery master disconnects, secure battery restraints, a high‑water bilge alarm, and 12‑volt bilge blowers are fitted. Four bilge pumps provide redundancy: two units at 2000 gallons per hour with auto/manual operation and two at 1100 gallons per hour with automatic operation. The salon and staterooms are safeguarded by CO detectors. Navigation is aided by a Ritchie illuminated flush‑mount 4.5‑inch compass, temperature and oil‑pressure engine alarms, a dual‑trumpet 12‑volt horn, and an internal bonding system using 8‑gauge wire to ABYC standards. Isolation transformers with ELCI inlet breakers (60 Hz) protect the internal shore‑power lines. The windlass package includes a 44‑pound Davis anchor with 150 feet of 5/16‑inch chain. Molded diamond‑pattern nonskid surfaces cover all walk decks, USCG/COLREG navigation lights provide compliance, an electronically controlled Golight Stryker spotlight adds precision, and Racor fuel filtration serves both engines and generator.

Aft, the cockpit and swim platform are designed for living. A telescoping three‑step boarding ladder with grab rail hides within the platform. The extending cockpit measures approximately 71 ft² (6.6 m²) with the transom lounge forward and expands to about 79 ft² (7.3 m²) when the lounge slides aft. Stainless grab rails flank the side‑deck steps and crown the transom. A guttered, watertight engine‑room hatch with a locking stainless latch, gas assist, and a ladder to the machinery space is sized to allow equipment removal. Recessed courtesy lights with exterior switches and recessed overhead lights in polished chrome with blue LEDs set the evening mood. Integral side‑deck stairways port and starboard simplify movement forward. An upgraded Fusion stereo with JL speakers and amplifier delivers rich sound. Storage abounds: lockers in the swim‑platform area to port and starboard; a starboard locker aft of the salon door beneath the side‑deck area housing the main accessory battery switch and sized for deck‑chair stowage; and an additional starboard‑side locker. Port and starboard transom gates combine stainless structures with etched plexiglass and secure positively, and a port‑side wet bar with sink and storage serves alfresco service.

The helm is ergonomic and beautifully equipped. An access panel reveals wiring beneath, accessory space accommodates further electronics, and a 12‑volt outlet stands by. Beverage holders are at hand. Each diesel engine is monitored by its own digital LCD display for tachometer, hour meter, engine‑oil pressure, engine‑coolant temperature, engine‑battery voltage, transmission‑fluid pressure and temperature, and rudder angle. A fire‑extinguisher alarm is automatic, and an analog fuel‑level gauge provides a traditional reference. The bench‑style helm seat offers six‑way power adjustment, high‑quality marine‑grade upholstery with embroidery stitching, and storage beneath. An overhead red night‑reading light preserves night vision. Rocker‑switch controls, spotlight control, a tilt‑pivot crowned by a custom 2024 Italian Gussi steering wheel, a Volvo IPS joystick, twin windshield wipers/washers to port and starboard, and windshield defoggers complete a captain’s‑grade station.

The salon balances style and function. AC and DC distribution panel cabinets are neatly integrated. Two air‑conditioning controls fine‑tune comfort. Designer décor includes premium wallcoverings and fabrics, and two designer chairs complement the lounge with storage beneath its cushions. Duette shades dress the lower salon windows, and fixed tempered safety‑glass windows frame the view. Entertainment is anchored by a 32‑inch Sole LCD TV on a lift, a stereo with DVD/CD, Sirius satellite radio built to marine standards, and an Apple iPod dock, while STARLINK satellite internet provides high‑speed wireless access anywhere aboard. The entrance door combines a hinged starboard panel and a bi‑fold port panel to maximize the opening and uses a painted aluminum frame with a handle lock and deadbolt. Dark Wenge flooring runs underfoot. Overhead LED lighting in brushed stainless housings dims electronically, rocker light switches provide intuitive control, Sonance speakers—four in total—fill the space, and the table converts to a double berth with filler cushions that stow under the VIP stateroom berth.

The galley is crafted for serious cruising. A solid‑surface countertop, premium décor, and a dark Wenge sole set the tone. A dedicated electrical outlet supports appliances, and recessed overhead lights illuminate the workspace. A liquor cabinet with glass shelves, built‑in storage for bottles and stemware, and blue accent lighting adds sophistication. A stainless‑finish built‑in microwave convection oven/grill pairs with an electric two‑burner Ceran‑top range and exhaust fan. Pantry cabinets on the forward and aft bulkheads expand provisioning space. A new dual‑drawer refrigerator/freezer streamlines access. Rocker switches control lighting. An undermounted stainless sink with a German designer faucet anchors cleanup. A storage cabinet with a painted front that evokes stainless, five self‑closing storage drawers with matching painted fronts, and a built‑in trash receptacle on slide‑out hinges complete a practical, elegant galley.

Accommodations

The owner’s cabin is a serene retreat with its own air‑conditioning control and a new liveaboard‑grade queen island berth featuring a pillow‑top innerspring mattress, generous under‑berth storage on gas‑assist hinges, a wood headboard, and padded bolster trim coordinated with the hull color. Advanced‑protection carpeting resists stains, fading, wear, and crushing and is laid over a proper pad. Port and starboard deck portlights have décor‑matched sliding shades. Premium wallcoverings and fabrics elevate the ambiance, two electrical outlets serve devices, and the entrance door from the companionway secures open and closed with matching hardware. Full‑height hanging lockers to port and starboard include designer stainless handles and automatic lighting, complemented by four round 10‑inch fixed hull portlights. Lighting is layered with recessed halogen overheads on electronic dimmers, rope accent lighting above the deck‑window curtains, and two focused reading lights. A lockable overhead hatch provides ventilation. Rocker light switches are intuitive, and a full custom Italian sheet set—fitted and flat sheets plus two pillowcases—awaits turn‑down. Two storage drawers under the berth, hull‑side shelves, décor‑matched pleated window treatments, and a brand‑new electronic safe set in the floor of the starboard hanging locker complete thoughtful detailing.

The VIP stateroom offers a queen pillow‑top innerspring berth with storage beneath and padded bolster trim in the hull’s palette. The same advanced‑protection carpeting rides on a pad, with designer décor throughout. Two electrical outlets and an entrance door from the companionway with matched hardware combine practicality and privacy. Natural light arrives via a fixed hull window and a skylight, while a round opening hull portlight with a screen invites fresh air. Stowage is abundant in a hanging locker with three drawers beneath and an additional hanging locker with mirrored doors and drawer storage. Over‑berth halogen reading illumination joins recessed halogen overhead lights. A nightstand with drawer storage, a cushioned seat, rocker switches, and pleated, décor‑matched window treatments round out the space.

The guest stateroom is flexible and bright, with two twin berths featuring pillow‑top innerspring mattresses and padded bolster trim to match the hull color. It carries the same advanced‑protection carpeting on a pad and the premium décor scheme. Two electrical outlets, an entrance door from the companionway, and a fixed hull window complemented by a round opening portlight with screen speak to liveability. A hanging locker with three drawers and automatic lighting, a directional halogen reading light over the berth head, and six recessed halogen overhead lights ensure comfort. A nightstand with storage, rocker switches, a skylight, and décor‑matched pleated window treatments finish the cabin.

The master head is lined in marble flooring and fitted with a lockable door from the master stateroom with an integral doorstop and matching hardware. Ventilation is handled by an exhaust fan, and a round frosted‑glass hull portlight with screen brings daylight. Recessed halogen overhead lights illuminate a mirrored‑door medicine cabinet, rocker switches, and a skylight. A storage cabinet over the toilet also carries mirrored doors. The VacuFlush pedestal toilet offers a run/sleep switch, complemented by a wall‑mounted paper holder and towel bars. The vanity features a countertop with a vessel sink and drawers. The separate shower stall includes its own light, a nonskid sole, a frameless tempered‑glass door that secures closed, an overhead Kohler shower head, recessed halogen lighting, and a fiberglass shower seat.

The guest head mirrors the quality with marble flooring, secure entrance doors with integral doorstops and matched hardware, an exhaust fan, and a round frosted‑glass hull portlight with screen. Recessed halogen lighting sets the scene for a mirrored‑door medicine cabinet, rocker switches, a skylight, and a storage cabinet with mirrored doors. The VacuFlush pedestal toilet has a run/sleep switch, paired with a wall‑mounted paper holder and towel bars. The vanity carries a countertop with a vessel and sink drawers. The separate shower stall features its own light, a nonskid sole, a tempered‑glass door that secures closed, an overhead Kohler shower head, recessed halogen lighting, and a fiberglass shower seat.

Mechanical disclaimer

Engine and generator hours are stated as of the date of the original listing and reflect information provided to the listing broker by the owner and/or actual readings on the hour meters. The broker cannot guarantee the true hours. It is the responsibility of the purchaser and/or the purchaser’s agent to verify engine hours, warranties implied or otherwise, major overhauls, and all other representations noted in the listing brochure.

Disclaimer

The details of this vessel are offered in good faith but without guarantees or warranties as to the accuracy of the information or the condition of the vessel. A buyer should instruct his agents or surveyors to investigate any details the buyer wishes to validate. This vessel is offered subject to prior sale, price change, or withdrawal without notice.