Powered by a Cummins 6BT 5.9M 210 HP diesel with approximately 3,800 hours. The four-blade bronze prop was reconditioned by Accutech in 2026 and is equipped with a line cutter. The Blue Seas 31 is a Downeast-style design with a semi-displacement hull, full-length keel, protected rudder, and pronounced bow flare. This boat is the original shorter-wheelhouse version of the design.
The current owner has owned the boat for 14 years and has generally stored it indoors during the winter. During that ownership, the boat has completed two Intracoastal trips to Florida, along with regular cruising throughout New England and Long Island.
The interior includes a galley-down layout, head, berths, salon screening, and privacy curtains. The large cockpit provides space for cruising, entertaining, or fishing. Equipment & Features
Side-Power bow thruster with dual controls
Upper station bimini and cover
Front window cover
Full cockpit awning
St. Croix davits
2025 Highfield 9.2 air-floor dinghy
Honda 2 HP four-stroke outboard
Oversized Rocna primary anchor with 60' of chain and 200'+ of rode
Fortress auxiliary/stern anchor
Magma gas grill
Four rocket-launcher rod holders
Five trolling rod holders
Hot and cold cockpit shower
Freshwater washdown
Multiple automatic and manual bilge pumps
Balmar 614 12 volt programmable charging system
ProNautic 12.40P AC charging system Specifications
LOA: 31'
Beam: 11' 5"
Fuel: 200 gallons
Water: 40 gallons
Holding: 20 gallons
Power
Cummins 6BT 5.9M
210 HP
Approximately 3,800 hours
Four-blade bronze prop
Prop reconditioned by Accutech in 2026
Line cutter
Boat Details
Dimensions
Length Overall30'
Display Length30' 7"
Beam11' 6"
Boat Details
Year1989
MakeBlue Seas
Model31
ConditionUsed
CategoryCruisers, Flybridge
ClassCruisers
TypePower
Hull MaterialFiberglass
Performance
Fuel TypeDiesel
Cruise Speed9.8 kn
Max Speed13 kn
Tanks & Capacity
Fuel Capacity100 gal
Fresh Water40 gal
Holding Tank20 gal
Builder & Registry
Boat LocationHampton, NH, US
Registration NumberZ0J10024G889
Listed SinceSep 3, 2026
Propulsion
Engine 1Cummins 6BT5.9M
FuelDiesel
Power210 HP
Hours3800
Additional Specs, Equipment and Information
Disclaimer
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.
Photos32 images
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