1999 Mainship 350
$119,500
Boat in Harbor Springs, MI 49740 US
Built in 1999
350
1 Engine (Caterpillar)
39.8 feet
Diesel
Fiberglass/Reinforced
The Mainship 350 trawler (later called the 390) is one of the few built in the U.S.A, is very popular for extended cruising, and the Great Loop. This particular 350/390 has successfully done the Great Loop twice, and ready for her next adventure. Her desirable features include: single Caterpillar Diesel with bow thruster, updated radar/plotter, electric anchor windlass, high gloss gelcoat, tall Bimini, and so much more. A popular coastal cruiser built on a modified-V, semi-displacement hull. It features a spacious interior with two staterooms and a single head with a separate shower, a large flybridge, and walk-around side decks. Well maintained by experienced yachtsmen owners.
M/V Passport 1999 Mainship 350/390: The boat was commissioned in Marquette, MI and has been in fresh water except for two Great Loops, one in 2011/2012 and one in 2023/2024. We are the third owners and have owned since late 2019. She has been carefully maintained with complete records available including annual fluid sample analysis.
- Refrigerator with separate freezer
- Princess 3 burner propane stove with oven
- G.E. microwave (built in)
- Complete hot (engine heat exchanger and 110 volt)
- Corian counter tops
- Garmin XSV radar/plotter (2022)
- Raypilot 650 autopilot
- Raytheon Tri-Data (knot/log, depth sounder)
- Standard Horizon Matrix VHF radio
- AIS transceiver (2022)
- Flow Scan
- Ritchie compass
- Northern Lights 6 Kw generator with factory "sound box"; 353 hours
- Batteries (3, new)
- Automatic battery charger
- Shore power inlets, both forward and aft
- Shore power cords
- Side Power bow thruster (both helms)
- Marine Air two zone air conditioning
- Bennett trim tabs
- High water bilge alarm
- Propane and CO2 detectors
- Fuel fills both port and starboard (midship)
- Lewmar electric windlass (chain gypsy and rope drum) with foredeck controls, anchor washdown, Rocna Vulcan 55# anchor (with 180' all chain rode) Danforth anchor (180' rope/chain rode)
- Flybridge centerline swivel helm seat, bench seating on both sides, fixed centerline table with leaves and storage, radar mast, dunnage box, folding chairs (2), grill
- Curved stairs to the bridge
- Wide walkway forward with tall bulwarks
- Bimini top with full enclosure, weather cloths, navy blue canvas
- Dinghy davits
- Life Sling
- Transom door
- Transom shower
- Windshield white screen
- Garmin GPSMAP 10X 2 SVX plotter and GMR Phantom 18 radar 2022
- AIS. 2022
- Bilge alarms upper and lower 2023
- 25 kg (55 lb) Rocna Vulcan anchor 2022 (180’ chain)
- Custom mast hinge 2022
- Upper deck core repair
- LED lighting in salon and NAV lights
- Fluid analysis every year
- 3k engine maintenance 9/24
- Oil change always before recommended
- Fluid changes every year
- Flush coolant 3/25
- Replace impeller 3/25
- Replace engine zincs 9/24
- Service thruster 3/24
- Replace thruster, trim tabs, stern zincs 3/25
- Swim platform redone 2023
- Bottom paint 5/2022
- Touch up bottom paint 2023, 2025
- Replace all 12v fans inside
- New weather station (lower) and mast-mounted sensor 3/25
- Removed coffee maker/ replaced with cabinet door for extra storage (original coffee maker available)
- Replaced heater element, thermostat and high temp switch in water heater
- New fresh water pump 7/2025
- New 110 outlet in salon ‘24
- Added USB/ cigarette lighter charging station upper helm
- Custom bilge pump brackets to facilitate inspection and cleaning
- Seafire engine fire suppression system
- Hailing horn 2023
- New batteries 2025
- Refinished salon table 2023
- New black water guage 2024
- Hinged mast
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
| Date | Event | Price |
|---|---|---|
| 1/22/26 | Initial price | $119,500 |
1999 Mainship 350 Video Tours
Overview from around the web 1999 Mainship 350
Customers appreciate the 1999 Mainship 350 for its solid construction and comfortable layout, making it an excellent choice for both cruising and liveaboard lifestyles
Many highlight the spacious salon and well-designed galley, which provide a home-like feel on the water. The boat’s twin diesel engines are often praised for reliability and smooth performance. Owners also note the practical flybridge with good visibility and ample seating, ideal for socializing and enjoying the scenery. Some mention that while the design is classic, the vessel offers modern conveniences and ample storage, contributing to an enjoyable boating experience overall.
The Biggest Pros and Cons
The 1999 Mainship 350 is a popular cruiser known for its solid construction and comfortable layout. Here are some pros and cons to consider:
Pros
Spacious Interior: The 350 offers a roomy cabin with ample headroom and a well-designed galley, making it comfortable for extended stays.
Sturdy Build: Known for its solid fiberglass hull and quality craftsmanship, providing durability and a stable ride.
Good Visibility: The pilothouse design features large windows, offering excellent visibility while underway.
Functional Layout: The boat includes a practical flybridge and cockpit area, ideal for both relaxing and entertaining.
Reliable Engines: Typically equipped with dependable twin diesel engines that provide efficient cruising performance.
Cons
Older Electronics: Being a 1999 model, onboard electronics and navigation systems may be outdated and could require upgrading.
Moderate Fuel Efficiency: While reliable, the twin diesel engines can consume a fair amount of fuel compared to newer models.
Limited Speed: The Mainship 350 is designed more for comfort and cruising rather than high speed.
Maintenance Needs: As with any vessel of this age, ongoing maintenance and potential refurbishment may be necessary to keep systems in top condition.
Weight and Size: The boat’s weight and size may limit access to shallower waters and require careful handling in tight marinas.
Made For
The 1999 Mainship 350 is ideal for boating enthusiasts who value comfort, versatility, and classic cruising capabilities. It is perfect for families or small groups looking for a spacious and reliable vessel for weekend getaways, coastal cruising, or fishing adventures. With its well-appointed interior and ample deck space, the Mainship 350 suits those who appreciate a blend of functionality and style on the water.
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Other Information about Irish Boat Shop
Irish Boat Shop has provided services to recreational boaters in Harbor Springs since 1961, Lake Charlevoix since 1971, and Traverse City since 2018. Our family-owned operation, modern facilities, and breadth of experience is why we're considered the boating experts in Northern Michigan.
Boat Location
Contact Irish Boat Shop about 1999 Mainship 350
400 E Bay St, Harbor Springs, MI, 49740
Contact Irish Boat Shop
400 E Bay St, Harbor Springs, MI, 49740
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