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2004 Duffy Duffy Flybridge Downeast

Oxford, Maryland


2004 Duffy Flybridge 37 Sport Cruiser


Altantic Boat Company has been building beautiful semi-custom yachts and work boats in New England since 1982.  This timeless Spencer Lincoln designed Duffy 37 has been highly customized by the builder and her experienced owners. 


Altantic worked closely with Infinity and Beyond's owners in order to create the perfect couples cruising boat.  Like all Duffy's she is a true "built down" lobster boat hull design. The hull features a full keel with protected prop and rudder for a comfortable ride in almost all sea conditions.  Her powerful 480hp Volvo Diesel will cruise her at 15 knots, wide open at 20 knots, or throttle her down and use her like a trawler and only use 1GPH.  


Her modern galley up designentry doors on three sides, and large master stateroom with separate shower make her unique compared to most of the 37's that were built. 

She is loaded with top of the line cruising gear and equipment.  Every system has been carefully selected and installed with built in redundancy.

Infinity and Beyond is a beautiful boat.  She will turn heads everywhere see goes with her timeless and classic style and comfortable cruising accommodations. 

Simply put, this is a very special Duffy. 

Heat Exchanger and After Coolers Done August 2023

Owner will entertain all Offers!




KAM Yacht Sales, LLC is pleased to assist you in the purchase of this vessel. This boat is centrally listed by Campbell's Yacht Sales.

Basic Boat Info

Make: Duffy
Model: Duffy Flybridge Downeast
Year: 2004
Condition: Used
Category: Power
Construction: Fiberglass
Boat Hull ID: ABM37023G303
Has Hull ID: Yes


Length: 37 ft / 11.28 m
Length Overall: 37 ft / 11.28 m
Beam: 13'1 ft / 3.99 m
Max Draft: 4'2 ft / 1.27 m
Displacement: 21,000 lb
Cabins Count: 1

Engines / Speed

Engines: 1
  • Make: Volvo
  • Model: TAMD75
  • Drive Type: Direct
  • Fuel: Diesel
  • Engine Power: 480hp
  • Type: Inboard
  • Year: 2002
  • Engine Hours: 2105
  • Engine Location: Center
Cruising Speed: 15 kn
Maximum Speed: 20 kn


Fuel Tanks: 1
Fuel Tank Capacity: 250 gal
Water Tanks: 1
Water Tank Capacity: 80 gal
Holding Tank Count: 1
Holding Tank Capacity: 28 gal


Heads Count: 1
Drive Type: Direct
Windlass Type: Electric
Boat Class: Downeast, Lobster Boat

Walk Through

Walk Through

Starting forward is the private owners cabin, featuring a large v-berth with drawer storage underneath.  His and hers hanging lockers, and additional drawers to port and starboard.  Moving aft to starboard is a large head with Corian counters, mirrored storage vanity, Vacuflush head, and a stainless steel sink and faucet,. Opposite to port is a massive separate shower, equal in size to the head.  Walking aft, up two steps gains access to the salon, galley, and lower helm area.  There are heavy sliding doors to port and starboard and a teak hinged door leading to the cockpit.   The lower helm offers two adjustable Stidd chairs to port and starboard.  Moving aft you enter the main salon area with an L- shaped dinette (convertible to double sized bed) with solid teak table to starboard, and a galley to port. The Galley is comfortable and well equipped with plenty of refrigeration and freezer capacity.

Entering the cockpit from the main teak doorway, there is a ice maker to port and storage locker.  The teak cockpit coaming is finished with Awl-wood, with a hinged tuna door in the transom.  A solid teak swim platform is mounted to the stern, with underwater lights below.

A stainless steel ladder w/ King Starboard steps leads to the fly-bridge above.   The fly-bridge features two more Stidd chairs, and an L-shapes settee.  There is a mast with assorted electronic components and flag halyards.   A blue Sunbrella bimini provides plenty of shade, and can be folded and stored when not needed.  


Additional Information


Lower Helm:

  • New Electronics installed (2018)
  • Garmin GPSmap sxv 
  • Garmin GMR18 Radar on Mast
  • Raymarine ST6001 Hydraulic Autopilot
  • Icom IC-M602 VHF
  • Fusion Stereo w/ Klipsch speakers throughout vessel
  • Klipsch speakers throughout vessel
  • ACR Remote spotlight
  • Twin Volvo Penta Displays for engine monitoring and fuel consumption
  • Engine Guages
  • ACR Globalfix EPIRB with mount in cockpit


Upper Helm:

  • Repeater Garmin GPSmap 7612
  • Garmin GMR 18 Radar on Mast
  • Raymarine ST6001 Hydraulic Autopilot
  • Icom IC-M602 VHF
  • Klipsch speakers throughout vessel
  • ACR Remote spotlight
  • Twin Volvo Penta Displays for engine monitoring and fuel consumption



One of the most unique features of this custom Duffy is the modern galley up design.  The galley is located immediately to port and shares space with the main salon.  With a ton of refrigerator and freezer capacity, there is plenty of room for provisions. 

  • Nova Cool 7.5 Cu. Ft. Combination refrigerator/ freezer 12/24V
  • Nova Cool Top loading freezer 2.5 Cu. Ft. 12/24V
  • Kenyon EuroKara smooth top two burner electric range
  • U-Line Ice Maker located in cockpit
  • Panasonic microwave
  • Custom slide out storage with toaster and coffee maker
  • Deep stainless steel sink
  • Single lever faucet w/ soap dispenser
  • Under counter storage
  • Toaster and coffee maker


Perhaps one of the most notable features of Infinity and Beyond is it's electrical system.  Each Duffy is built on a semi custom basis.  The owners of Infinity were very well versed in high end marine electrical equipment.    The electrical system has several redundancies built in. 

  • 6KW Northern Lights Genset with 60 hours. (New 2021 )
  • (1) Group 27  Generator Starting Battery 
  • (4) Group 24 maintenance free  Batteries
  • Magnum Charger/Inverter
  • Custom Mastervolt A/C and D/C breaker panels
  • 30A and 50A shorepower inlets
  • (3) Abyss Underwater LED lights 
  • 24V 75Amp  Alternator 


  • Volvo Penta TAMD 75 P-A Diesel. 480HP @ 2600 RPM (2105 hours)
  • Volvo Penta single lever electronic controls
  • ZF 2F260-1 Transmission
  • 2" shaft w/ 5 blade bronze propeller
  • Dripless Shaft Seal- Las-Drop
  • Volvo Penta electronic displays w/ trip computers and fuel economy
  • Northern Lights 6KW Genset (60 hours)
  • Sidepower Bow Thruster w/ twin controls
  • (2) MarineAire  reverse cycle heating and air Units
  • Kahlenburg Bros pneumatic air horn w/ compressor and tank (Commercial grade)
  • Reverso oil change pump for main and genset
  • Racor 75900MAX dual cartridge fuel filter system
  • Fire Boy extinguisher for engine room
  • Windshield wipers with controller


  • Vacuflush head and holding tank system
  • Diaphram pump for overboard discharge
  • Shurflo Smart Sensor fresh water pump w/ Filter
  • 12 Gallon 120V water heater w/ engine heat exchanger
  • Raw water washdown for cockpit and bow
  • Fresh water shower for cockpit
  • Tank Watch holding tank monitor
  • Water level guage

Hull and Deck

  • Solid hand laid fiberglass hull
  • Vinylester skin coat on hull
  • Full keel with skeg rudder and shoe
  • Hull Painted with White Awl Grip (2021)
  • Top Sides painted with White Awl Grip (2021)
  • Access doors on port, starboard and aft
  • Hinged stern door
  • Transom Door
  • Teak swim platform, finished with Awgrip Awlwood  
  • Teak hand rails and trim finished with Awlgrip Awlwood 
  • Cockpit nonskid refinished 4/2017
  • Simpson Lawrence Windlass w/ controls at bow and helms
  • 35 lb CQR anchor with 200' chain and swivel 
  • Bottom painted and Zincs 6/2023
  • Stainless steel cleats and chocks
  • Stainless steel bow rails

Additional Equipment

  • Spare bow thruster propeller and zincs
  • Assortment of fenders and dock lines
  • Stern anchor w/ rode and storage bag
  • Anchor bridle 
  • Assortment of Chart Kits

Owner Updates

10/17  Marine Propulsion
Repacked rudder packing box,  Troubleshooting temp gage.  Repainted bottom/zincs.   Seatalk Autopilot Head.  New VHF.   New Pye-Barker Fire Boy System.

3/19/18. Signal Marine
Full electronics outfit.  Installed 2 Garmin MFD’s, radar, WX/Sirius, TV antenna, networking, and stereo system.  Removed all previous navigation equipment and all wiring cables, networking, and terminal blocks.  Installed GMR18 on mast with custom mounting plate.  Installed GMX53 in mast.  Installed 15” open air antenna on mast.  Installed Garmin network hub. Installed Garmin 7612 and 7612sxv, integrated existing transducer with junction.  Installed isolated fuse box for all networking items.  Installed Fusion RA70n stereo.

5/4/18  Signal Marine
Installed mechanical water temperature gage and oil pressure gage at flybridge.  Oil change.

6/15/18  Atlantic Marine
Replaced forward HVAC unit with new turbo Domatic DTU6 115V HVAC unit.

10/10/18. Campbell’s Boatyards
Repaired and replaced underwater lights. 
Replaced forward hatch and trim.

10/14/19  Marine Propulsion
Removed transducer and glass over hole.  Installed to new transducer Garmin GT50M-HP.

6/29/20. Replaced all rubber gaskets on portholes and replaced 4 plastic ports.

1/28/21 to 3/22. Deltaville Boatyard
Replaced Mastervolt System except for transformer, circuit panel, and one communication module.  New Northern Light Generator 6KW and exhaust system, all inverters, chargers, batteries, battery cables, all charger cables, switches, and wiring.  Replaced exhaust elbow at turbocharger and exhaust hose.  Re-bonded all through-hull fittings and seacocks.  Repaired port fuel tank with epoxy and resealed supply and intake hose port.  Added new extra vent for both fuel tanks.  Painted entire exterior topsides and hull.  Sealed port window at galley.

6/22. Signal Marine
Cleaned up electrical after painting.  Installed bow-thruster module lever at flybridge, repaired windless switches, repaired WX antenna, repaired and replaced TV antenna and coax.  Repaired underwater light wiring.

7/22 Harbor Master
Rebuilt vacu flush toilet.

Flybridge 3 piece Sunbrella clear zippered wind shield.

Replaced main alternator 24V/75 amp

12/5/22. Sweetgrass Diesel
Trip to St. Simon Island, replaced wet rubber hose 2”, air filter, and repaired exhaust leak at exhaust elbow.

2/3/23  Gary Woods Marine Inc.
Replaced turbocharger with Volvo 2139 Turbo (2 year warranty)..

Heat Exchanger and After Cooler Done - August 2023


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.

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