Used Motorboat Sea Ray 310 Sundancer

General Remarks

Big Blue is a well-presented example of the ever-popular Sea Ray 310 Sundancer, offering a practical and sociable layout combined with dependable diesel performance. This model is well regarded for its balance of comfort and capability, making it equally suited to coastal cruising and extended weekends aboard.

The current owner has invested both time and care into maintaining and upgrading the vessel. A comprehensive programme of works has been carried out in recent years, including significant mechanical attention such as turbo work, riser replacement, refurbished heat exchangers, and a full outdrive service with new bellows and universal joints, this gives a new owner confidence that is has been well looked after. More recent works in 2025 include antifouling, anodes, hull preparation with Gelshield epoxy, and a full compound and polish.

On deck, the addition of the Dek-King faux teak, replacing the standard carpet, provides a smart and practical finish, complemented by a full set of cockpit canopies which have benefitted from window renewal. The cockpit itself offers a generous social space, ideal for entertaining or relaxing at anchor.

Below decks, the layout is both functional and comfortable, with a forward double berth and a well-sized aft cabin, along with a heads compartment accessible from both the saloon and aft cabin. The upholstery is reported to be in very good condition for the age, contributing to a welcoming interior space. She is fitted with Air-Con (Heat and Cool) for comfort in winter and summer.

The inventory also reflects thoughtful upgrades including, inverter, bow thruster with remote, and a well-rounded navigation package. A 2023 survey is available for inspection by request.

Overall, Big Blue represents a well-maintained and extensively updated example of this popular sports cruiser.

Brokers Remarks

In my view Big Blue is a boat that has clearly been enjoyed and consistently looked after by her current owner. It’s not often you see an example where so much has been done in recent years, particularly in terms of both mechanical servicing and general upkeep.

She presents very well for her age, with the upholstery and overall cosmetic condition standing out, and the upgrades such as the decking and navigation equipment really adding to the package. The engine work and recent servicing should also give a level of reassurance to the next owner.

She feels like a solid, honest example of the 310 Sundancer—ready to be enjoyed in the same way the current owner has used her.

Saloon

• Convertible Saloon Seating Area

• Upholstery in Very Good Condition for Age

• Fusion Audio System with Speakers (2022)

Galley

• Sink with Pressurised Water

• Hob

• Fridge

• Storage

Heads

• Enclosed Heads Compartment

• Access from Saloon and Aft Cabin

• Marine Toilet

• Sink with Shower

Cabin

• Forward Double Berth

• Aft Cabin Double Berth

• Storage Throughout

• Upholstery in Very Good Condition for Age

Cockpit and Deck

• Spacious Cockpit Seating Area

• Cockpit Table

  Dek-King Faux Teak Decking, Fully Margined (2017)

• Full Cockpit Canopies (New 2017, Windows Renewed 2023)

• Electric Anchor Windlass

• Swim Platform with Boarding Ladder

Electronics

• Raymarine RL70C Pathfinder Radar

• Raymarine A78 Chartplotter

• Raymarine SmartPilot Autopilot with Head Unit (2018)

• Raymarine Tri-Data (2025)

• VeeThree Digital Engine Monitoring System (2013)

• Lowrance Link-8 VHF

Misc and Safety

• Ropes and Fenders

• Anodes Replaced (July 2025)

• Antifouled (July 2025)

• 2023 Survey Available Upon Request

Hull and Design

• GRP Planing Hull

• White Hull with Radar Arch

• Hull Scraped and Gelshield Epoxy Applied (July 2025)

• Compounded and Polished (July 2025)

Engine and Systems

• Twin D-Tronic 250 Diesel Engines

• Engine Hours: 1276 (Port) / 1140 (Starboard)

• Bravo 3 Outdrives

• Outdrives Serviced (July 2025)

• New Bellows and Universal Joints (July 2025)

• New Stainless Steel Propellers (2019)

• Port Turbo Reconditioned (2026)

• Starboard Turbo Replaced (2019)

• New Risers (2019)

• Heat Exchangers Refurbished (2019)

• Engine Belts Replaced (Nov 2025)

• Engine Freshwater Flush Kit (2017)

• Serviced by Owner (July 2025)

• Average Speed: 23 Knots

• Maximum Speed: 35 Knots

• Bow Thruster (Max Power, 2013) with Remote

• Batteries Replaced (2023) – 2x 180Ah Leisure, 1x 180Ah Starter

• New Calorifier (2023)

• 700W Waeco Inverter (2019)

• Webasto Heating (2013)