2004 Mainship 340

$195,000

Used

Boat in Yorktown, VA 23690 US

builtBuilt in 2004
Year the boat was built
model

340

Boat model
engine

1 Engine (Yanmar)

Engine type and count
length

34.7 feet

Overall boat length
fuel

Diesel

Fuel type
material

Fiberglass/Reinforced

Hull material
Nominal Length
34.67ft
Length Overall
34.67ft
Beam
14.17ft
Max Bridge Clearance
17ft
Cabin Headroom
6.17ft
Dry Weight
22000lb
Cruising Speed
8kn
Max Speed
12kn
Cabins
1
Heads
1
Max Passengers
12
Seating Capacity
4
Fresh Water Tanks
70gal
Fuel Tanks
250gal
Holding Tanks
30gal
Hull Material
fiberglass
Engine 1
Engine Make
Yanmar
Engine Model
6LYA-STP
Engine Hours
3800
Engine Type
inboard
Fuel Type
diesel
Engine Year
2004
Drive Type
direct
Propeller Type
3-blade
Propeller Material
bronze
Galley
  • Dometic refrigerator/freezer in engine room
  • Plenty of counter space (Corian)
  • Stainless Steel Sink
  • Hot and Cold Water Pressure
  • Plenty of Storage
  • Toaster Oven
  • Two Burner Induction Stove top
  • Filtered water faucet
Electronics/Navigation
  • New Raymarine Autopilot Wireless Smart Controller (E15023), and Raymarine Type 1 Hydraulic 12v Pump 
  • Garmin GPSMap 7610 (Radar, Depth, Chartplotter) (Lower Helm)
  • Garmin GPSMap 7612 (Radar, Depth, Chartplotter) (Upper Helm)
  • Raymarine E-80 (SATNAV, Depth)
  • Raymarine ST6002 Autopilot
  • (2) Garmin VHF 11 Radios
Deck & Hull
  • New bridge enclosure (2025) with clear Isinglass front panels, perfect protection from the elements while maintaining visibility
  • Renology 175w Solar Power System 
  • Fresh bottom paint and zincs (2025)
  • Forespar Davit Nova Lift located on the aft flying bridge deck 250 lb load
  • Removable heavy duty pivoting davit system for dinghy
  • Swimladder
  • MAGMA grill
  • Brand new never used West Marine RU 250 Roll-up inflatable dinghy in bag w/electric pump
  • Recently replaced eight -6VDC wet cell batteries
  • 2-person remote headset system
  • Covered aft deck with molded steps to the flybridge
  • Upper helm station with full instrumentation
  • Excellent visibility and layout for single-handing or cruising with guests
  • Efficient hull design with protected running gear for shallow water operation
  • New mounted storage box on flybridge
Accomodations
  • MarineAir 9,000 BTU AC in forward cabin and Cruisair 16,000 BTU AC in main salon
  • Spacious Salon with ample cabinetry and finely crafted joinery throughout
  • Master Stateroom with centerline queen berth and cedar lined closet
  • New Dometic VacuFlush 140 series head 
  • Stall shower
Engine/Mechanical


  • Single Yanmar 6LYA-STP 370 hp Diesel Engine, 3800 hours
  • serviced for 2025 season: oil, filters, impeller and engine flush
  • Kohler 8KW Diesel Generator – well-maintained, reliable, and lightly used
  • Bow and stern thrusters
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.

Price History

DateEventPrice
10/1/25Price decreased$195,000(-1.5%)
8/18/25Price decreased$198,000(-2.0%)
7/21/25Initial price$202,000

Overview from around the web 2004 Mainship 340

Customers praise the 2004 Mainship 340 for its spacious and well-designed interior, making it ideal for comfortable cruising and overnight stays

Many appreciate its solid construction and reliable performance, highlighting the boat’s stability and ease of handling. The large cockpit area and practical layout receive positive remarks for enhancing both relaxation and socializing on board. Additionally, owners often mention the efficient use of space, including ample storage and functional amenities, which contribute to an enjoyable boating experience. Overall, the 2004 Mainship 340 is valued for combining comfort, durability, and versatility.

The Biggest Pros and Cons

The 2004 Mainship 340 offers a range of features that appeal to cruising enthusiasts, but like any boat, it comes with both advantages and drawbacks. Here’s a balanced overview of the pros and cons:

Pros

Spacious Interior: The Mainship 340 boasts a roomy cabin with comfortable sleeping accommodations, including a forward V-berth and a mid-cabin, making it ideal for extended cruising.

Solid Construction: Known for its sturdy build quality, the 2004 model provides durability and reliability on the water.

Well-Equipped Galley: The boat features a functional galley with a stove, refrigerator, and ample storage, supporting comfortable meal preparation.

Good Visibility: The pilothouse design offers excellent all-around visibility, enhancing safety and ease of navigation.

Generous Deck Space: With a sizable cockpit and deck area, it’s well-suited for fishing, entertaining, or relaxing outdoors.

Engine Performance: Powered typically by twin diesel engines, the Mainship 340 delivers dependable performance and efficient cruising speeds.

Cons

Fuel Consumption: While the twin engines offer good power, they can result in higher fuel consumption compared to single-engine models.

Maneuverability: The boat’s size and design may make tight docking or handling in confined spaces more challenging for less experienced operators.

Maintenance Costs: As with many older vessels, upkeep and maintenance can be more demanding and costly, particularly if previous owners have deferred regular servicing.

Limited Headroom in Some Areas: Certain parts of the cabin, such as the mid-cabin, may have restricted headroom, which could affect comfort for taller individuals.

Older Electronics: Depending on the specific boat, onboard electronics and navigation equipment may be outdated and require upgrading.

Made For

The 2004 Mainship 340 is ideal for boating enthusiasts who seek a versatile and comfortable cruiser that combines classic style with modern amenities. It’s perfect for small families or couples looking to enjoy weekend getaways, coastal cruising, or leisurely day trips on the water. With its spacious interior, functional layout, and reliable performance, the Mainship 340 caters to those who appreciate quality craftsmanship and a practical design suited for both relaxation and entertaining.

Finance your dream boat!

Use our boat payment calculator to estimate monthly payments for 2004 Mainship 340. Enter your down payment, choose a loan term, and adjust the interest rate to see an instant payment estimate — ideal if you're calculating boat payments before you enquire. Wondering how much does a Trawler cost in today's market, or how much does a Mainship cost for similar models? This boat financing calculator helps you compare scenarios in seconds, whether you're considering used boat financing or a new purchase.
Monthly payment
$2,213.19/mo
$
$
Loan amount$ 195,000
OR
%

Finance your dream boat!

Use our boat payment calculator to estimate monthly payments for 2004 Mainship 340. Enter your down payment, choose a loan term, and adjust the interest rate to see an instant payment estimate — ideal if you're calculating boat payments before you enquire. Wondering how much does a Trawler cost in today's market, or how much does a Mainship cost for similar models? This boat financing calculator helps you compare scenarios in seconds, whether you're considering used boat financing or a new purchase.
Monthly payment
$2,213.19/mo
$
$
Loan amount$ 195,000
OR
%

Contact Southern Bay Yacht Sales

102 Harbor Crescent, Seaford, VA, 23696

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Seaford, VA 23696

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