1999 Mainship 350

$119,500

Used

Boat in Harbor Springs, MI 49740 US

builtBuilt in 1999
Year the boat was built
model

350

Boat model
engine

1 Engine (Caterpillar)

Engine type and count
length

39.8 feet

Overall boat length
fuel

Diesel

Fuel type
material

Fiberglass/Reinforced

Hull material
Length Overall
39.75ft
Beam
14.17ft
Max Bridge Clearance
18.67ft
Max Draft
3.67ft
Cabin Headroom
6.42ft
Dry Weight
22000lb
Cabins
2
Heads
1
Fresh Water Tanks
130gal
Fuel Tanks
300gal
Holding Tanks
30gal
Hull Material
fiberglass
Hull Shape
semi-displacement
Engine 1
Engine Make
Caterpillar
Engine Model
3116T
Total Power
300hp
Engine Hours
3839
Engine Type
inboard
Fuel Type
diesel
Engine Year
1999
Drive Type
direct
Ac
Summary
This 1999 Mainship 350 trawler is available for sale at $119,500. This vessel is 34.75ft in length overall with a Caterpillar inboard. Accommodations include 2 cabins and 1 head. A used Mainship 350/390 is perfect for overnight cruising and day cruising. This vessel is located in Harbor Springs, MI.
Sellers Note

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.

Galley
  • 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
Electronics
  • 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


Electrical System
  • 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


Mechanical Equipment and Engine Details
  • 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)


Hull and Deck
  • 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


Upgrades and Extras
  • 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
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.

Generators
Generator 1
Make
Northern Lights
KW
6
RPM
0
Hours
353
Date Hours Recorded
01/22/2026
Detail
Northern Lights, 6 KW, 353 hours

Price History

DateEventPrice
1/22/26Initial price$119,500

Contact Irish Boat Shop

400 E Bay St, Harbor Springs, MI, 49740

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Address

400 E Bay St
Harbor Springs, MI 49740
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.

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