Boats

2004 Mainship 390 Trawler Description

 This 2004 Mainship 390 Trawler has spent most of its life in fresh water and has been professionally maintained and looks and shows like new. Owner had recent 1000 Hr maintenance performed in summer of 2025. The current owner has owned her since 2021 and has traveled down the ICW and out to the Dry Tortugas and back to Lake Ontario, where she resides in freshwater. Prior owners have taken this boat around the Great Loop. The vessel is equipped with bow and stern thrusters which makes for stress free docking and easy maneuverability for a couple to cruise. She is powered by a single 370 hp Yanmar (6LYA-STP) diesel engine w/ only 3168 Hrs, which is the most desirable and best-performing powerplant for the Mainship 390. It offers superior engine room access compared to cramped twin setups, better speed than smaller options, and avoids the known reliability issues of period Caterpillar alternatives. This vessel is turn-key and is in immaculate condition. Schedule a viewing today…you will not be disappointed !!

Key Features:

• Single Diesel Power – Most desirable and best-performing powerplant – 370 hp Yanmar (6LYA-STP) diesel engine w/ only 3168 Hrs.
• Bow & Stern Thrusters – Precise control for easy docking in any condition.
• 8kW Kohler Generator w/ less than 400 Hrs – Power all systems comfortably while at anchor or underway.
• Two-Stateroom Layout – Spacious master forward, guest cabin to port, and large head with separate shower. 
• Expansive Salon – Lower helm, large windows, galley up, and ample seating. 
• Flybridge – Full helm station with seating for crew and guests, bimini cover and aluminum rails.
• Wide Side Decks – Safe and easy movement forward with molded steps from cockpit to bridge. 
• Cruising Efficiency

Additional Information:

• Garmin GPS/Chartplotter/Radar (Qty 2)
• Depth Finder (new 2021)
• Microwave (New 2025)
• Bow Thruster
• Stern Thruster
• Windless
• Stainless hoist for outboard
• Achilles 8ft Tender, hard bottom with weaver davits and storage bag w/ 5hp Honda 4 stroke outboard
• Batteries/Chargers/Inverter
• Magma Gas Grill with rod holder mount
• Bug screens for front hatch
• Side door and middle windshield window
• Zip enclosure for stairway
• Cradle available 

Accommodations:

• Forward master stateroom with island berth, storage, and hanging lockers
• Guest stateroom with twin berths (convertible)
• Head with electric toilet, vanity, and enclosed shower
• Salon with convertible settee, entertainment center, and lower helm access
• Galley with refrigerator/freezer, stove/oven, microwave, and deep sink. 

Electronics & Upgrades:

• Bow and stern thrusters with easy-access controls at both helms
• Updated navigation electronics – Garmin
• VHF, autopilot, radar
• Generator
• Air Conditioning/Heat

Highlights:

• Proven Great Loop and coastal cruiser 
• Comfortable accommodations for family or guests
• Economical single-Diesel operation with trawler speeds and semi-planing hull capability 
• This is a turn-key vessel and ready for your next adventure

Mainship’s Description:

The Mainship 390 Trawler blends today’s technology with years of experience in crafting thousands of trawlers. Inside the spacious cabin, for example, is a lower helm station that’s complete with full instrumentation and a windshield equipped with wipers and washers. The salon features warm teak highlighted by designer fabrics, a color television and VCR, a stereo, and opening windows with screens. Deck access is made easy for shorthanded cruising with a starboard helm sliding door. There is also a large screened sliding door to the cockpit. The 390 Trawler’s galley is equipped for cruising or entertaining with a range, an oven, a microwave, a full-size refrigerator, an oversize sink, abundant cabinets and Corian countertops. The large master stateroom has a center island bed, cedar-lined hanging lockers, an opening portlight and hatch, and again more storage. For guests, a second stateroom features twin berths along with a hanging locker, storage, an opening hatch and a portlight. And finally, the easy cleaning, molded fiberglass head offers a built-in vanity, a shower, an electric marine toilet, an opening hatch, a portlight and a mirror. The power to travel is provided by a standard single diesel or optional twins. Both include freshwater cooling, an engine alarm system and a standard fire extinguisher system. To make docking easier, a bow thruster is standard on single engine boats and optional on boats with twin powerplants. On the flybridge there is a large area for entertaining or lounging, seating for more than six, and a drop-leaf table. The center helm has great visibility, full instrumentation and plenty of room for electronics (note the radar mast). This deck is reached by a wide, molded stairway with a full handrail. Access forward to the anchor is protected by a high bulwark and a walk-around deck. In the cockpit there is more than ample storage with deep wells and a lazarette