1997 Mainship 350 Trawler
Conway, South Carolina
Great Loop Veteran – Ready to Do It Again!
Booking appointments now!
Just completed the American Great Loop and she’s ready to do it all over again for a third time. This nicely updated and extensively equipped Mainship 350 offers the rare combination of economical operation, outstanding cruising capability, modern electronics, and numerous upgrades that make long-range cruising easy and enjoyable.
If you’re looking for a proven Great Loop vessel, this is one you need to see.
Why This Mainship Stands Out
- Single 300 HP Caterpillar diesel (freshwater cooled)
- Caterpillar-certified inspection/survey completed in 2025
- Freshwater-cooled aftercooler
- Approximately 3,770 engine hours
- Full-length keel protects the propeller
- Shallow 3.5-foot draft
- Air draft approximately 18.5 feet
- Fold-down radar mast lowers air draft to approximately 14.5 feet in seconds
- Ideal Great Loop configuration
Generator & Power Systems
2022 Onan 9kW Generator
- Approximately 390 hours
- Digital control panel
- Transferable 5-year warranty
Advanced Off-Grid Power Package
- 2025 EcoFlow Delta 2 Max system
- 2,016 Wh primary battery
- Additional 2,048 Wh battery
- Total capacity: 4,064 Wh
- 250W rigid solar panel
- Supports:
- Microwave
- Keurig
- Refrigerators
- Ice maker
- Dehumidifier
- Small heater
- Up to approximately 2 days at anchor depending on solar conditions
- Recharge both batteries in under 2 hours using generator
Additional Charging Systems
- EcoFlow DC-to-DC 800W alternator charger
- Reverse charging capability for house/start batteries
- Battery maintenance mode
- Victron Centaur 12V 60A 3-bank charger
- Victron solar charging system
- 220W solar panel for house/start batteries
- Galvanic isolator
Navigation & Electronics (2022 Updates)
Redundant navigation systems provide excellent reliability for long-distance cruising.
Upper & Lower Helm Stations
- Garmin 942 Touchscreen
- Garmin 7-inch touchscreen
- Raymarine Axiom touchscreen
- Navionics charts
- Radar
- AIS Transmit
- Autopilot with rotary control
- Dual VHF radios
- Dual 7-inch displays at lower helm
- Dual 9-inch displays at flybridge
Simply upload a route or use auto-routing and allow the autopilot to follow the course.
Additional Electronics:
- Garmin AIS Transmit
- Nebo Link
- Wireless spotlight controls
- Eartec UL2S full-duplex wireless communication headsets (2-user system)
Fuel System
- NEW fuel tanks installed in 2020 and 2022
- Racor fuel filter/water separator
- Vacuum gauge monitoring system
Comfort & Accommodations
Interior Features
- Spacious wide-beam layout
- Beautiful teak interior
- Galley-up design
- Walk-around queen berth in master stateroom
- Excellent lower helm visibility
- Sliding helm door for easy docking and locking
- Molded flybridge stairs (no ladder)
- Separate shower stall
- New electric head
- New sanitation hoses
- New acrylic hatches, seals, screens, blackouts, and rain guards
Climate Control
- Two Marine Air reverse-cycle AC/Heat units
- 2022 six-gallon hot water heater
- Engine-heated hot water underway
Entertainment
- 32″ Toshiba Fire TV
- New articulating side-mount bracket
- USB charging stations throughout
Deck & Ground Tackle
Anchoring Equipment
- Simpson Lawrence horizontal windlass rebuilt in 2023
- Wireless remote controls added in 2025
- Rocna anchor
- 40′ chain
- 160′ rode
- Swivel connection
Deck Features
- Wide side decks with secure railings
- Integral swim platform
- Transom door
- Sun shades
- Dual mid-cleats with 1/4″ stainless backing plates (2025)
- Large dock box/storage lounger (2025)
- Two new folding loungers (2025)
- Folding teak end table
- Magna propane grill
Mechanical Updates & Maintenance
Recent maintenance includes:
- New transmission cooler
- New engine zincs
- New stern bilge pump
- New forward bilge pump float switch
- Holding tank sensor serviced
- Cat engine oil and filters changed
- Fuel filters changed
- Onan generator oil and filters changed
- Generator water pump serviced
- Generator impeller replaced
- Generator zincs replaced
- AirSep air cleaner serviced
- Oil X-Change-R system
- Current propeller tuned (12/24)
- Spare propeller included
Batteries & Electrical
- Two 8D house batteries (2022)
- Series 27 generator battery
- Series 31 bow thruster battery
- Dedicated bow thruster battery/charger
- Two 30-amp shore power connections (bow and stern)
- 50-amp adapter included
- Two newer EEL shore power cords
- GFCI protection throughout
Safety Equipment
- Auto-inflating PFDs
- Additional life jackets
- Anchor buoys
- Fenders and fender boards
- New CO and CO₂ detectors
- Spotlight
Included Extras
- Two Citizen folding bicycles
- Dock box/sundeck storage lounger
- Folding teak table
- Spare alternator
- Spare head motor
- Spare water pump
- Spare filters
- Spare impellers for engine, generator, and Honda outboard
Additional Notes
- Originally a North Chesapeake boat
- Primarily operated in low-salinity brackish water
- Excellent lower helm visibility for cold or wet cruising days
- Swim platform remains accessible with dinghy attached
Location: Conway, South Carolina
This proven Great Loop cruiser is exceptionally well-equipped, thoughtfully upgraded, and ready to depart on its next adventure immediately. Whether you’re planning the Loop, coastal cruising, or comfortable liveaboard life, this Mainship 350 deserves a serious look.











