Yachts for sale / Duffy Flybridge 37

2000 Duffy Flybridge 37

Camden, ME, US 36.9 ft · 13.5 ft' beam 1 cabin 18 kn kn top
Asking
$175,000
Our Thoughts

The 2000 Duffy Flybridge 37 represents a rare intersection of proven offshore design and obsessive systems engineering. This 36.92-foot Spencer Lincoln design, built on a cored fiberglass hull with Vinylester outer skin and reinforced bottom laminate, has been methodically transformed into a technology-forward cruising platform by an owner who treated the vessel as a living laboratory for marine electronics and power management.

Powered by a 2000 Volvo Penta TAMD74C-A EDC 450-horsepower diesel with twin-disc transmission and single-lever electric control at both helms, this Duffy delivers the reliability and fuel efficiency the model is known for, with a cruising speed of 12 knots and capability to 18 knots. The propulsion package includes a 4-kilowatt Lewmar 185TT 12-volt bow thruster, Evolution Marine razor cutter, PYI PSS dripless shaft seal, and recently rebuilt hydraulic steering—all components that matter to serious offshore cruisers. Dual 150-gallon stainless steel fuel tanks, 100-gallon water capacity, and 50-gallon holding tank support extended coastal passages.

What sets Gizmo apart is the depth of its electrical and navigational infrastructure. The house power system centers on a 400-amp-hour LiFePO4 battery bank with Lynx BMS, Victron Multiplus inverter/charger, and Cerbo GX monitoring—installed in 2022 and paired with 280-watt solar panels and nearly complete LED conversion. This level of battery specification and solar integration directly addresses the modern cruiser's anchor-life expectations. Fast dual-alternator charging ensures rapid recovery when underway.

The navigation and monitoring ecosystem reflects years of refinement. The flybridge station features a 2016 Furuno TZT2 12-inch multifunction display networked with Furuno DRS4D-NXT Doppler radar. The lower helm integrates an Intel NUC7i5BNK PC running TimeZero Navigator, displaying to both a 15.6-inch Wimaxit touch screen and 26-inch Vizio monitor, synchronized with an iPad running TZ iBoat and paired with a redundant Simrad GO5 XSE chartplotter with side-scanning sonar and autopilot controls. Dual NMEA 2000 sensor networks support Furuno FI70 instruments, B&G Triton T41 displays, and Simrad AC12 autopilot functionality at both helms.

Communication and connectivity are comprehensive. The 2021 Garmin Cortex advanced VHF and AIS transponder includes cellular off-boat monitoring capability. A 2024 Standard Horizon GX2400 VHF with AIS receive and RAM4X wireless microphone extends communication reach to the flybridge. Onboard connectivity includes a Netgear WiFi router, Wave WiFi high-power marina bridge, and Cel-Fi cell booster. Starlink integration is architecturally feasible.

The interior layout reflects the Duffy 37's reputation for livable cruising accommodations. The galley features LPG cooking with a 20-pound steel tank, Xintex propane fume detection with solenoid control, and a 10-square-foot fire blanket. Audio systems include Garmin Fusion Apollo WB670 with remote controls and Bose speakers distributed throughout. Multiple USB charging points and nine AC outlets

Provided listing description Click to read the original broker text

Major Price ReductionDropped $50,000Please contact me for additional information on Gizmo and the extensive list of updates and equipmentGizmo really lives up to its name.  While the Duffy 37 hull is highly respected as a comfortable sea worthy boat, the current owner has used it as testing platform for all types of electronic, systems, and electrical equipment since he purchased her in 2009.  Over the years Gizmo has been outfitted with the highest level of navigation, operation and monitoring system in our industry.  After retirement the owner honed the systems to only leave the best and most functional tested.  Now Gizmo is a refined vessel for the next steward ready to cruise up or down the coast. We have extensive records of all the work that has gone into this remarkable vessel.  Here are some of the highlights of the owners work: 400 amp hour LiFePO4 house battery bank with Lynx BMS, Multiplus Inverter/Charger, & Cerbo GX monitoring, all Victron & new 2022 with 280W solar panels & almost all-LED lighting, Gizmo is largely self-sufficient at anchor, with fast dual-alternator charging when needed.  Furuno TZT2 12 multifunction display (2016) on flybridge with NXT radar and fishfinding networked to Intel NUC PC (2020) running TimeZero Navigator at lower helm, and synchronized with included boat iPad running TZ iBoat (and various other boat apps). Dual NMEA 2000 sensor networks and multiple Furuno and Maretron instrument displays for extensive system monitoring plus redundant critical navigation data. Plus redundant Simrad GO5 chartplotter with side-scanning sonar and AP controls. Local Netgear WiFi router with Wave WiFi high-power bridge for marina access points, plus Cel-Fi high-performance cell booster. Starlink or similar could be easily added. The boat PC drives dual displays, a 15.6-inch touch screen (2020) at the helm and 26-inch Vizio TV/monitor (2011) normally hidden in the chart table. Bluetooth keyboard and mouse work at either station, and also with iPad and a third device of your choice. Garmin Cortex (2021) advanced VHF & AIS transponder (with cellular off-boat monitoring) and Standard Horizon GX2400 VHF & AISrx (2024), both at lower helm and latter with RAM4X wireless mic for flybridge or elsewhere. And much moreThe owner has cruised up and down the East Coast single handed into the Carolinas.  The Spencer Lincoln design and robust systems made for a safe and relaxing journey. Please contact me for additional information on Gizmo and the extensive list of updates and equipmentGizmo is now available in Camden Harbor to be viewed.

2000 Duffy Flybridge 37: A Meticulously Engineered Coastal Cruiser with Cutting-Edge Systems Integration
Overview
The 2000 Duffy Flybridge 37 represents a compelling intersection of classic yacht design and modern marine technology. Built on the proven Spencer Lincoln hull form, this 36.92-foot vessel combines the seaworthiness and comfort that made the Duffy 37 a respected platform for East Coast cruising with an extraordinary depth of integrated electronic systems, power management, and navigation capability. Located in Camden Harbor, Maine, this particular example—aptly named Gizmo—has been systematically refined by an owner who used the boat as a living laboratory for marine electronics and systems integration from 2009 through his recent retirement. The result is a fully realized cruising yacht equipped at a level typically found only in much larger or newer vessels, now offered at a significant price reduction. The Duffy 37 hull design is recognized throughout the cruising community for its seaworthiness, comfortable motion in a seaway, and practical layout. The 13.5-foot beam provides stability and interior volume without sacrificing maneuverability or fuel efficiency. Twin Volvo Penta TAMD74C-A diesel engines rated at 450 horsepower each, paired with Twin Disc MG 5075 A E shift transmissions, deliver a cruising speed of 12 knots and a maximum speed of 18 knots—ideal for coastal passage-making and harbor maneuvering. The vessel's 150-gallon fuel capacity per side (300 gallons total) supports extended offshore range, while the 100-gallon water tank and modern power systems enable comfortable extended-stay cruising at anchor. What distinguishes Gizmo from standard examples of this model is the owner's methodical approach to systems integration. Rather than pursuing every available upgrade, the owner tested extensively and retained only the most functional and reliable technologies. This philosophy has resulted in a vessel where every major system—from navigation and propulsion monitoring to electrical power management and communication—operates as an integrated whole, with redundancy where it matters most and user-friendly interfaces at both helm stations.
Design and Construction
The Duffy 37 hull employs a proven construction methodology: cored fiberglass laminate with a Vinylester outer skin coat, 5/8-inch Balsa core down to the inboard stringers, and an equal laminate inside. The bottom receives additional reinforcement with four layers of 3205 fiberglass, a detail that extends hull life and resale value in salt-water service. The off-white gelcoat finish with painted black bootstripe presents a classic appearance, while the green ACT antifouling bottom paint indicates active maintenance for salt-water cruising. The deck and superstructure employ molded fiberglass laminates with Balsa cores and white gelcoat finish, a construction standard that provides strength, insulation, and durability. The deck-to-hull joint uses shoebox construction with bedding and a white PVC rubrail fastened with stainless steel machine screws on 8-inch centers—a detail that prevents water intrusion and simplifies future maintenance. A raised teak toe rail with stainless steel capping runs the length of the vessel, combining traditional aesthetics with practical grip and safety.
Propulsion and Steering
Twin Volvo Penta TAMD74C-A engines with Electronic Diesel Control (EDC) provide the power foundation. Each engine produces 450 horsepower at 2,600 RPM, driving through Twin Disc MG 5075 A E shift transmissions with a 2.05:1 reduction ratio. The single-lever electric control at both helms—flybridge and lower—simplifies operation during docking and cruising. The propulsion system employs a 2-inch stainless steel prop shaft with a 5-blade, 26-inch by 26-inch left-hand propeller, paired with an Evolution Marine razor cutter and a PYI PSS dripless shaft seal that eliminates traditional stuffing box maintenance. Steering is handled by a rectangular stainless steel rudder with hydraulic actuation via a double-ram system at the rudder head, recently rebuilt in 2024 by National Marine. This robust steering setup ensures positive control in all sea states and docking conditions. A Lewmar 185TT 4-kilowatt 12-volt bow thruster provides lateral thrust for precision maneuvering in tight spaces, a feature that significantly enhances single-handed operation and reduces reliance on wind and current during approach.
Helm and Navigation Systems
Gizmo's navigation and monitoring architecture represents a level of integration and redundancy rarely encountered outside professional or research vessels. The owner's philosophy was to test systems extensively, then retain only those that proved most reliable and intuitive in actual use—resulting in a vessel that is both highly capable and operationally straightforward. Flybridge Station: The flybridge features a Furuno TZT2 12-inch multifunction display (2016) paired with a Furuno DRS4D-NXT Doppler radar, providing real-time weather and sea-state visualization during passage-making. Two Furuno FI70 instrument displays deliver engine, fuel, water, and electrical system data at a glance. A B&G Triton T41 autopilot keypad allows hands-off steering from the flybridge helm, essential for long-distance coastal cruising. A RAM4X wireless microphone extends VHF communication range throughout the vessel and to the surrounding area. Lower Helm Station: The lower helm operates as the primary command center, housing an Intel NUC7i5BNK PC powered by the vessel's DC electrical system. This computer can drive dual displays simultaneously: a Wimaxit 15.6-inch touch screen (2020) at the helm and a 26-inch Vizio M261VP LED HD TV/monitor (2011) normally hidden in the chart table. This setup enables real-time navigation, weather routing, and system monitoring via TimeZero Navigator software, synchronized with an included iPad running TZ iBoat and other marine applications. A Bluetooth keyboard and mouse work at either station, as well as with the iPad and a third device of the owner's choice, enabling flexible operation and data entry. The lower helm also integrates a Simrad GO5 XSE chartplotter with side-scanning sonar and autopilot controls, providing a second independent navigation source. A Simrad OP12 keypad extends autopilot and chart control. Dual NMEA 2000 sensor networks ensure that critical navigation data, engine parameters, tank levels, and electrical system status flow to all displays and instruments, with automatic failover if one network is disrupted. Communication and Connectivity: The vessel carries redundant VHF systems: a Garmin Cortex (2021) advanced VHF and AIS transponder at the lower helm with cellular off-boat monitoring capability, and a Standard Horizon GX2400 (2024) VHF and AIS receive-only unit, also at the lower helm, with a wireless microphone for flybridge or remote operation. A Garmin Fusion Apollo WB670 audio system with remotes integrates with the VHF units and provides entertainment audio throughout the vessel. Connectivity extends beyond the vessel through a Netgear WiFi router with a Wave WiFi high-power bridge for marina access points, plus a Cel-Fi high-performance cell booster that significantly extends cellular coverage in remote anchorages. The owner notes that Starlink or similar satellite internet could be easily integrated if desired, a valuable option for extended cruising away from coastal cell towers.
Electrical Systems and Power Management
The electrical architecture reflects years of testing and refinement. The house battery bank comprises 400 amp-hours of LiFePO4 chemistry, managed by a Lynx Battery Management System (BMS), paired with a Victron Multiplus Inverter/Charger and Cerbo GX monitoring system—all installed in 2022. This lithium setup provides silent, efficient power at anchor while eliminating the sulfation issues associated with traditional lead-acid batteries. Solar generation comes from 280 watts of panels, providing meaningful charge during daylight hours and reducing generator runtime. When rapid charging is needed, dual alternators on the main engines deliver power through the Multiplus charger at speeds far exceeding solar capability. Nearly all lighting has been converted to LED, reducing power draw and extending battery runtime at anchor. The combination of lithium batteries, solar panels, dual-alternator charging, and LED lighting makes Gizmo largely self-sufficient at anchor for extended periods—a genuine advantage for cruising in remote anchorages or during marina power outages. The vessel includes nine USB chargers and seven double AC outlets, distributed throughout the boat to support modern devices and appliances. This level of charging infrastructure is essential
Length
36.9 ft
Beam
13.5 ft'
Year
2000
Builder
Duffy
Model
Flybridge 37
Cabins
1
Max speed
18 kn kn
What type of boat is the Duffy 37 Flybridge and what is it designed for?
The Duffy 37 Flybridge is a Spencer Lincoln design motor yacht built in 2000, measuring 36.92 feet in length with a 13.5-foot beam. It's a comfortable, seaworthy cruising vessel designed for coastal passage-making and extended cruising. The flybridge design provides excellent visibility and outdoor entertaining space, while the lower helm offers full control and protection in rough conditions. This model is well-respected in the industry for its solid construction, sea-keeping ability, and practical layout for owner-operator cruising, particularly along the East Coast.
What engines and propulsion system does this Duffy 37 have?
The vessel is powered by twin 2000 Volvo Penta TAMD74C-A (EDC) diesel engines producing 450 HP each at 2600 RPM. Each engine drives a five-blade, 26-inch propeller through Twin Disc MG 5075 A E shift transmissions with a 2.05:1 ratio. The boat features Volvo single-lever electric controls at both the flybridge and lower helm stations for intuitive operation. Additional propulsion features include a Lewmar 185TT 4kW 12-volt bow thruster for docking assistance, a dripless shaft seal system, and hydraulic steering with dual rams rebuilt in 2024. Cruising speed is 12 knots with a maximum speed of 18 knots.
What is the electronics and navigation setup on this vessel?
This vessel features an exceptionally comprehensive electronics package. The flybridge helm includes a Furuno TZT2 12-inch multifunction display with Furuno DRS4D-NXT Doppler radar, dual Furuno FI70 instruments, B&G Triton T41 display, and B&G Triton Pilot autopilot keypad. The lower helm station operates an Intel NUC PC running TimeZero Navigator software connected to a 15.6-inch touch screen and 26-inch Vizio monitor, with a Simrad GO5 XSE chartplotter featuring side-scanning sonar. Dual NMEA 2000 sensor networks provide redundancy across the vessel. Navigation is further supported by a Garmin Cortex advanced VHF and AIS transponder with cellular monitoring, a Standard Horizon GX2400 VHF and AIS receiver with wireless microphone, and an iPad running TZ iBoat and Simrad Link apps. Sonar includes Furuno 520-PLD and Airmar DST810 units with Simrad LSS StructureScan. This multi-layered approach ensures redundant critical navigation data and exceptional situational awareness.
What power and battery systems support extended anchoring and cruising?
The vessel is equipped with a 400 amp-hour LiFePO4 house battery bank installed in 2022, managed by a Victron Lynx BMS (Battery Management System), Multiplus Inverter/Charger, and Cerbo GX monitoring system. The power system includes 280 watts of solar panels and nearly all-LED lighting throughout, making the boat largely self-sufficient at anchor. Dual alternators provide fast charging when the engines are running. The system supports extensive electrical loads including the navigation computer, multiple displays, WiFi infrastructure, and all onboard systems. A 10-gallon oil reservoir tank supports the hydraulic steering system.
What WiFi and communication systems are installed?
The vessel includes a Netgear WiFi router with a Wave WiFi high-power bridge for accessing marina WiFi networks. A Cel-Fi high-performance cell booster enhances cellular signal throughout the boat. The communication suite features dual VHF systems—a Garmin Cortex advanced VHF and AIS transponder with cellular off-boat monitoring capability, and a Standard Horizon GX2400 VHF and AIS receiver with RAM4X wireless microphone for flybridge operation. Infrastructure for Starlink or similar satellite internet could be easily integrated. Multiple USB chargers and seven double AC outlets support device connectivity throughout the vessel.
How is the helm station configured and what control options are available?
The vessel features dual helm stations—a flybridge helm and a lower helm—both with full operational control. The flybridge helm includes the Furuno TZT2 display, radar, instruments, and autopilot controls, providing excellent visibility for day cruising and docking. The lower helm offers an enclosed, protected station with an Intel PC-driven display system showing navigation, sonar, and monitoring data on a 15.6-inch touch screen and 26-inch Vizio monitor. Both helms operate the twin Volvo engines via single-lever electric controls, the bow thruster, and the autopilot. Bluetooth keyboard and mouse functionality allows seamless operation at either station or via iPad. The lower helm also includes a chart table with a hidden 26-inch monitor and comprehensive instrument displays for detailed navigation and system monitoring.
What is the cabin and interior layout of this cruising yacht?
The Duffy 37 features a practical interior layout designed for extended cruising. The galley is equipped with a stove with a fire blanket, and there is a shower compartment with a 50-gallon waste holding tank, electric macerator pump, and deck pumpout for marine sanitation compliance. Fresh water is stored in a 100-gallon SS tank mounted under the galley sole. The vessel has a lower helm station with chart table and integrated electronics, and the flybridge provides outdoor entertaining and observation space. The hull construction uses cored fiberglass laminate with a Vinylester outer skin, 5/8-inch Balsa core down to inboard stringers, and additional reinforcement layers on the bottom, ensuring a solid, seaworthy structure for comfortable cruising in various conditions.
What fuel and water capacity does the vessel have for cruising range?
The vessel carries two 150-gallon stainless steel rectangular fuel tanks located port and starboard, providing a total fuel capacity of 300 gallons. Fresh water is stored in a 100-gallon stainless steel tank mounted under the galley sole. At a 12-knot cruising speed, this fuel capacity supports extended coastal cruising. The owner has successfully cruised single-handed up and down the East Coast into the Carolinas, demonstrating the practical range and self-sufficiency of the fuel and water systems. Additional capacity includes a 50-gallon waste holding tank for marine sanitation and a 20-pound LPG tank for galley cooking.
What safety and fire suppression equipment is included?
The vessel is comprehensively equipped for safety and emergency response. Fire suppression includes two Kidde Mariner 110 marine 2.5-pound fire extinguishers installed in 2024, two Flag model ABC-050-G 5-pound fire extinguishers, an engine room automatic fire extinguisher, and a 10-square-foot fire blanket next to the stove. Additional safety gear includes eight lifejackets, a Sirius Signal C-1001 LED electronic visual distress signal, a Marinebeam Ultra Long Range flashlight, and a Weems & Plath Personal Rescue Strobe. A Marinco 10036 Shorty Horn provides sound signaling, and a Fireboy Xintex propane fume detector with solenoid valve control monitors LPG safety. The hydraulic steering system was rebuilt in 2024, and the vessel's robust construction and dual helm stations support safe operation in various sea states.
What audio and entertainment systems are onboard?
The vessel includes a Garmin Fusion Apollo WB670 audio system with remote controls and Bose speakers distributed throughout the boat, providing quality sound for entertainment and communication. The lower helm features a 26-inch Vizio LED HD TV and monitor that can display navigation data or entertainment content. Multiple USB chargers—approximately nine throughout the vessel—and seven double AC outlets support device charging and connectivity. The Multiplus Inverter/Charger provides AC power for these systems, and the comprehensive LED lighting throughout the boat creates a modern, efficient environment for both day and night cruising.
What makes this particular Duffy 37 different from a standard example of the model?
This vessel, named Gizmo, has been extensively upgraded and refined by its owner since 2009 as a testing platform for marine electronics, systems, and electrical equipment. The owner documented all work with comprehensive records and ultimately selected only the most functional and reliable systems after retirement. The result is a vessel with state-of-the-art navigation, power management, and monitoring systems that far exceed typical specifications for a 2000 model. Key differentiators include the 2022 LiFePO4 battery bank with Victron management, modern Furuno and Simrad electronics networked with a dedicated PC running professional-grade navigation software, dual VHF systems with AIS, redundant sonar and StructureScan, WiFi and cellular infrastructure, and a completely rebuilt hydraulic steering system. The owner's single-handed cruising to the Carolinas and the Spencer Lincoln hull design demonstrate that these systems have been proven in real-world conditions. This vessel represents a refined, well-tested platform for a buyer seeking advanced capabilities and documented system reliability.

Fly Yachts is pleased to assist you in the purchase of this vessel. This boat is centrally listed by Lyman-Morse Yacht Brokerage. It is offered as a convenience by this broker/dealer to its clients and is not intended to convey direct representation of a particular vessel.

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