• Slide: The Image of 1999 Mainship 350 Trawler docked at a sunny marina with blue canopy. - 1The Image of 1999 Mainship 350 Trawler docked at a sunny marina with blue canopy. - 1
  • Slide: The Image of 1999 Mainship 350 Trawler docked near wooden pier, surrounded by trees. - 2The Image of 1999 Mainship 350 Trawler docked near wooden pier, surrounded by trees. - 2
  • Slide: The Image of 1999 Mainship 350 Trawler docked, surrounded by lush greenery and other boats. - 3The Image of 1999 Mainship 350 Trawler docked, surrounded by lush greenery and other boats. - 3
  • Slide: The Image of 1999 Mainship 350 Trawler docked by a wooden pier, surrounded by lush greenery. - 4The Image of 1999 Mainship 350 Trawler docked by a wooden pier, surrounded by lush greenery. - 4
  • Slide: The Image of 1999 Mainship 350 Trawler boat logo on white hull. - 5The Image of 1999 Mainship 350 Trawler boat logo on white hull. - 5
  • Slide: The Image of 1999 Mainship 350 Trawler docked by a waterfront home, surrounded by lush greenery. - 6The Image of 1999 Mainship 350 Trawler docked by a waterfront home, surrounded by lush greenery. - 6
  • Slide: The Image of 1999 Mainship 350 Trawler docked, rear view, clear sky, Seaglass, Steinhatchee, FL. - 7The Image of 1999 Mainship 350 Trawler docked, rear view, clear sky, Seaglass, Steinhatchee, FL. - 7
  • Slide: The Image of 1999 Mainship 350 Trawler docked, displaying "Seaglass" and "Steinhatchee, FL" on the stern. - 8The Image of 1999 Mainship 350 Trawler docked, displaying "Seaglass" and "Steinhatchee, FL" on the stern. - 8
  • Slide: The Image of 1999 Mainship 350 Trawler deck with rope, fender, and covered equipment. - 9The Image of 1999 Mainship 350 Trawler deck with rope, fender, and covered equipment. - 9
  • Slide: The Image of 1999 Mainship 350 Trawler docked, featuring deck equipment and nearby wooden pier. - 10The Image of 1999 Mainship 350 Trawler docked, featuring deck equipment and nearby wooden pier. - 10
  • Slide: The Image of 1999 Mainship 350 Trawler side deck view with railing, docked near other boats. - 11The Image of 1999 Mainship 350 Trawler side deck view with railing, docked near other boats. - 11
  • Slide: The Image of 1999 Mainship 350 Trawler deck with railing and coiled green hose. - 12The Image of 1999 Mainship 350 Trawler deck with railing and coiled green hose. - 12
  • Slide: The Image of 1999 Mainship 350 Trawler bow view, docked on calm water. - 13The Image of 1999 Mainship 350 Trawler bow view, docked on calm water. - 13
  • Slide: The Image of Bow of 1999 Mainship 350 Trawler with anchor, rope, and railing. - 14The Image of Bow of 1999 Mainship 350 Trawler with anchor, rope, and railing. - 14
  • Slide: The Image of 1999 Mainship 350 Trawler deck with rope, hatch, and winch. - 15The Image of 1999 Mainship 350 Trawler deck with rope, hatch, and winch. - 15
  • Slide: The Image of 1999 Mainship 350 Trawler deck with stairs and nautical equipment. - 16The Image of 1999 Mainship 350 Trawler deck with stairs and nautical equipment. - 16
  • Slide: The Image of 1999 Mainship 350 Trawler cockpit with blue canopy and clear windows under a blue sky. - 17The Image of 1999 Mainship 350 Trawler cockpit with blue canopy and clear windows under a blue sky. - 17
  • Slide: The Image of White cushioned seat on 1999 Mainship 350 Trawler boat deck. - 18The Image of White cushioned seat on 1999 Mainship 350 Trawler boat deck. - 18
  • Slide: The Image of View from 1999 Mainship 350 Trawler, overlooking dock and lush greenery. - 19The Image of View from 1999 Mainship 350 Trawler, overlooking dock and lush greenery. - 19
  • Slide: The Image of 1999 Mainship 350 Trawler helm with navigation equipment and steering wheel. - 20The Image of 1999 Mainship 350 Trawler helm with navigation equipment and steering wheel. - 20
  • Slide: The Image of Raymarine display on 1999 Mainship 350 Trawler dashboard. - 21The Image of Raymarine display on 1999 Mainship 350 Trawler dashboard. - 21
  • Slide: The Image of 1999 Mainship 350 Trawler helm with steering wheel and control panel. - 22The Image of 1999 Mainship 350 Trawler helm with steering wheel and control panel. - 22
  • Slide: The Image of White seating area on a 1999 Mainship 350 Trawler, partially covered by a dark fabric. - 23The Image of White seating area on a 1999 Mainship 350 Trawler, partially covered by a dark fabric. - 23
  • Slide: The Image of Interior view of 1999 Mainship 350 Trawler with seating and table. - 24The Image of Interior view of 1999 Mainship 350 Trawler with seating and table. - 24
  • Slide: The Image of 1999 Mainship 350 Trawler interior with foldable table and cushioned seating. - 25The Image of 1999 Mainship 350 Trawler interior with foldable table and cushioned seating. - 25
  • Slide: The Image of 1999 Mainship 350 Trawler on a serene river, surrounded by autumn foliage. - 26The Image of 1999 Mainship 350 Trawler on a serene river, surrounded by autumn foliage. - 26
  • Slide: The Image of 1999 Mainship 350 Trawler cockpit with clear enclosure and steering wheel visible. - 27The Image of 1999 Mainship 350 Trawler cockpit with clear enclosure and steering wheel visible. - 27
  • Slide: The Image of Radar system on 1999 Mainship 350 Trawler against blue sky background. - 28The Image of Radar system on 1999 Mainship 350 Trawler against blue sky background. - 28
  • Slide: The Image of 1999 Mainship 350 Trawler with white exterior, glass door, and steps leading to upper deck. - 29The Image of 1999 Mainship 350 Trawler with white exterior, glass door, and steps leading to upper deck. - 29
  • Slide: The Image of 1999 Mainship 350 Trawler screen door with handle, docked in marina. - 30The Image of 1999 Mainship 350 Trawler screen door with handle, docked in marina. - 30
  • Slide: The Image of Electrical panel inside 1999 Mainship 350 Trawler, featuring switches and controls. - 31The Image of Electrical panel inside 1999 Mainship 350 Trawler, featuring switches and controls. - 31
  • Slide: The Image of Interior of 1999 Mainship 350 Trawler with wicker chairs and striped cushions. - 32The Image of Interior of 1999 Mainship 350 Trawler with wicker chairs and striped cushions. - 32
  • Slide: The Image of 1999 Mainship 350 Trawler interior with wooden helm, seating, and cabin view. - 33The Image of 1999 Mainship 350 Trawler interior with wooden helm, seating, and cabin view. - 33
  • Slide: The Image of Interior of 1999 Mainship 350 Trawler with kitchen and helm, featuring wooden cabinetry. - 34The Image of Interior of 1999 Mainship 350 Trawler with kitchen and helm, featuring wooden cabinetry. - 34
  • Slide: The Image of Decorative fish-patterned rug on a 1999 Mainship 350 Trawler boat floor. - 35The Image of Decorative fish-patterned rug on a 1999 Mainship 350 Trawler boat floor. - 35
  • Slide: The Image of 1999 Mainship 350 Trawler interior with kitchen appliances and sliding door to deck. - 36The Image of 1999 Mainship 350 Trawler interior with kitchen appliances and sliding door to deck. - 36
  • Slide: The Image of Kitchen area on a 1999 Mainship 350 Trawler with appliances. - 37The Image of Kitchen area on a 1999 Mainship 350 Trawler with appliances. - 37
  • Slide: The Image of Interior of 1999 Mainship 350 Trawler with kitchen and sink. - 38The Image of Interior of 1999 Mainship 350 Trawler with kitchen and sink. - 38
  • Slide: The Image of 1999 Mainship 350 Trawler cabin interior with wooden cabinetry and cozy sleeping area. - 39The Image of 1999 Mainship 350 Trawler cabin interior with wooden cabinetry and cozy sleeping area. - 39
  • Slide: The Image of Interior cabin of 1999 Mainship 350 Trawler with decorative "Sea Glass" sign. - 40The Image of Interior cabin of 1999 Mainship 350 Trawler with decorative "Sea Glass" sign. - 40
  • Slide: The Image of Interior cabin view of a 1999 Mainship 350 Trawler with bedding. - 41The Image of Interior cabin view of a 1999 Mainship 350 Trawler with bedding. - 41
  • Slide: The Image of 1999 Mainship 350 Trawler cabin interior with bed, pillows, and wooden cabinetry. - 42The Image of 1999 Mainship 350 Trawler cabin interior with bed, pillows, and wooden cabinetry. - 42
  • Slide: The Image of Cozy cabin interior of 1999 Mainship 350 Trawler with plaid bedding and anchor decor. - 43The Image of Cozy cabin interior of 1999 Mainship 350 Trawler with plaid bedding and anchor decor. - 43
  • Slide: The Image of Cozy cabin interior of 1999 Mainship 350 Trawler with bed and wooden cabinetry. - 44The Image of Cozy cabin interior of 1999 Mainship 350 Trawler with bed and wooden cabinetry. - 44
  • Slide: The Image of Bathroom interior of 1999 Mainship 350 Trawler with toilet and storage cabinet. - 45The Image of Bathroom interior of 1999 Mainship 350 Trawler with toilet and storage cabinet. - 45
  • Slide: The Image of Bathroom interior of 1999 Mainship 350 Trawler with sink, toilet, and toiletries. - 46The Image of Bathroom interior of 1999 Mainship 350 Trawler with sink, toilet, and toiletries. - 46
  • Slide: The Image of Shower area inside 1999 Mainship 350 Trawler with glass door and wooden frame. - 47The Image of Shower area inside 1999 Mainship 350 Trawler with glass door and wooden frame. - 47
  • Slide: The Image of Engine compartment of a 1999 Mainship 350 Trawler with Caterpillar engine and batteries. - 48The Image of Engine compartment of a 1999 Mainship 350 Trawler with Caterpillar engine and batteries. - 48
  • Slide: The Image of Battery compartment of a 1999 Mainship 350 Trawler with connected cables and oil container. - 49The Image of Battery compartment of a 1999 Mainship 350 Trawler with connected cables and oil container. - 49
  • Slide: The Image of Engine room of 1999 Mainship 350 Trawler with visible ladder and equipment. - 50The Image of Engine room of 1999 Mainship 350 Trawler with visible ladder and equipment. - 50
  • Slide: The Image of Engine compartment of 1999 Mainship 350 Trawler with Caterpillar engine. - 51The Image of Engine compartment of 1999 Mainship 350 Trawler with Caterpillar engine. - 51
  • Slide: The Image of Engine compartment of a 1999 Mainship 350 Trawler, showing wiring and mechanical components. - 52The Image of Engine compartment of a 1999 Mainship 350 Trawler, showing wiring and mechanical components. - 52
  • Slide: The Image of 1999 Mainship 350 Trawler deck with ropes and fenders, docked by the water. - 53The Image of 1999 Mainship 350 Trawler deck with ropes and fenders, docked by the water. - 53
  • Slide: The Image of Engine compartment of a 1999 Mainship 350 Trawler, showing mechanical components and wiring. - 54The Image of Engine compartment of a 1999 Mainship 350 Trawler, showing mechanical components and wiring. - 54
  • Slide: The Image of Engine compartment of a 1999 Mainship 350 Trawler, showing mechanical components and wiring. - 55The Image of Engine compartment of a 1999 Mainship 350 Trawler, showing mechanical components and wiring. - 55
  • Slide: The Image of Engine compartment of a 1999 Mainship 350 Trawler with exhaust hose and clamps. - 56The Image of Engine compartment of a 1999 Mainship 350 Trawler with exhaust hose and clamps. - 56
  • Slide: The Image of 1999 Mainship 350 Trawler being lifted at a marina with a worker nearby. - 57The Image of 1999 Mainship 350 Trawler being lifted at a marina with a worker nearby. - 57
  • Slide: The Image of 1999 Mainship 350 Trawler being lifted by a boat hoist at a marina. - 58The Image of 1999 Mainship 350 Trawler being lifted by a boat hoist at a marina. - 58
  • Slide: The Image of 1999 Mainship 350 Trawler on dry dock, undergoing maintenance with ladders and tarp. - 59The Image of 1999 Mainship 350 Trawler on dry dock, undergoing maintenance with ladders and tarp. - 59
  • Slide: The Image of 1999 Mainship 350 Trawler propeller and rudder on blue tarp background. - 60The Image of 1999 Mainship 350 Trawler propeller and rudder on blue tarp background. - 60
  • Slide: The Image of 1999 Mainship 350 Trawler on blue tarp, supported by blocks and stands. - 61The Image of 1999 Mainship 350 Trawler on blue tarp, supported by blocks and stands. - 61
  • Slide: The Image of 1999 Mainship 350 Trawler bow on blue tarp, supported by stands. - 62The Image of 1999 Mainship 350 Trawler bow on blue tarp, supported by stands. - 62
  • Slide: The Image of 1999 Mainship 350 Trawler with blue hull on stands, viewed from below. - 63The Image of 1999 Mainship 350 Trawler with blue hull on stands, viewed from below. - 63
  • Slide: The Image of Bottom view of 1999 Mainship 350 Trawler on blue tarp, showcasing hull details. - 64The Image of Bottom view of 1999 Mainship 350 Trawler on blue tarp, showcasing hull details. - 64
  • Slide: The Image of Bottom view of a 1999 Mainship 350 Trawler on wooden blocks. - 65The Image of Bottom view of a 1999 Mainship 350 Trawler on wooden blocks. - 65
  • Slide: The Image of 1999 Mainship 350 Trawler on stands, under cloudy sky, side view. - 66The Image of 1999 Mainship 350 Trawler on stands, under cloudy sky, side view. - 66
1/67

1999 Mainship 350 Trawler

$139,000

Used

Boat in Moore Haven, FL 33471 US

builtBuilt in 1999
Year the boat was built
model

350 Trawler

Boat model
engine

1 Engine (Caterpillar)

Engine type and count
length

35 feet

Overall boat length
fuel

Diesel

Fuel type
material

Fiberglass/Reinforced

Hull material

1999 Mainship 350 Trawler - Seaglass

The 1999 Mainship 350 Trawler "Seaglass" is a highly sought-after single-diesel cruising trawler offering efficiency, comfort, and easy handling. Powered by a dependable 300hp Caterpillar 3116, she delivers economical cruising performance, paired with a Kohler 8kW generator (1,215 hrs) for extended stays aboard.

Designed for Great Loop cruising, coastal passages, or comfortable liveaboard life, this 350 features dual-zone reverse-cycle air conditioning (16k & 12k BTU), a spacious salon with cherry interior, a fully equipped galley with Corian counters, and a private master stateroom with island berth. The guest cabin with twin berths and a separate enclosed shower make her ideal for cruising couples or small families.

Her flybridge is fully protected with a Stamoid Bimini and full Strataglass enclosure, and docking is simplified with a Side-Power bow thruster. Updated electronics include a Raymarine Axiom RV9 touchscreen MFD with Quantum radar, VHF with RAM mic, and full upper and lower helm stations.

Well-equipped, well-maintained, and loaded with factory options, Seaglass represents an outstanding value in the 35' cruising trawler market.

Highlights

  • Single 300hp Caterpillar 3116 diesel

  • Kohler 8kW generator (1,215 hrs)

  • Dual-zone A/C with reverse cycle heat

  • Raymarine Axiom RV9 + Quantum Radar

  • Side-Power 4HP bow thruster

  • Upper & lower helms

  • Full Strataglass enclosure (2020)

  • Oil X-Change-R system

  • Cherry interior, updated salon furniture (2022)

  • Windlass & dual anchors

  • Racor fuel polishing system

  • Excellent Great Loop candidate

Nominal Length
35ft
Length Overall
39.75ft
Beam
14.17ft
Max Bridge Clearance
20ft
Max Draft
3.67ft
Cabin Headroom
6.5ft
Displacement
22000lb
Cabins
2
Heads
1
Fresh Water Tanks
130gal
Fuel Tanks
300gal
Holding Tanks
30gal
Windlass
electric-windlass
Hull Material
fiberglass
Hull Shape
semi-displacement
Engine 1
Engine Make
Caterpillar
Engine Model
3116
Total Power
300hp
Engine Hours
1875
Engine Type
inboard
Fuel Type
diesel
Drive Type
direct
Updates and Upgrades

February 2026

  • New Battery Charger
  • New Bilge Pump
  • New Windshield Canvas
  • New Bow Thruster Motor, Cables, Joystick Control

January 2026

  • Paint Swim Platform
  • New Carbon Monoxide Monitor
  • New Fire Extinguisher

December 2025

  • New Windlass Cables
  • Service Lower Helm Hydraulic Fluid

November 2025

  • Bottom Paint
  • Repack Packing Gland
  • Oil & Filters on Engine and Generator
  • Transmission Fluid Change
  • New Batteries (5) Total

2024

  • Serviced Fuel Filters
  • Serviced Oil X-Chang-R System

2023

  • Backup Camera
  • Replaced Bow Thruster Propellor

2022

  • Replaced Cutlass Bearing
  • Replaced Water Pump Impeller
Factory Installed Options
  • Dual Zone Air Conditioning with Reverse Cycle Heat
  • Kohler Generator, 8kW Diesel with 1215hrs
  • Spotlight with Remote
  • Windlass
  • Oil X-Change-R System
Accommodations

Salon

  • 16K BTU Air Conditioning System
  • Cherry Interior
  • Color Television, Wired for Cable
  • New Salon Furniture, Chairs and Table (2022)
  • LED Lights
  • Full Windshield with Wipers
  • Interior Lighting
  • Large Sliding Door to Cockpit with Screen
  • Lower Station with Full Instrumentation
  • Opening Center Window
  • Sliding Windows with Screens
  • Stereo System with CD
  • Flat Screen TV
  • Phifertex Salon window covers with Heat Barrier Panels

Galley

  • Corian Counters
  • Portable Frigidaire Ice Maker (2021)
  • Designer Faucet (2022)
  • Dish/Cup Locker
  • Full-Size NovaKool Refrigerator/Freezer, AC/DC
  • Oversize Galley Sink with Cutting Board
  • Overhead Cabinets
  • Princess (3) Burner Range with Oven
  • Microwave
  • LED Lights
  • Under-Counter Storage

Master Stateroom

  • Center Island Bed with Inner Spring Mattress
  • 12k BTU Air Conditioning System
  • Cedar-Lined Wardrobe Locker (2)
  • Drawers Under Berth
  • LED Lights
  • High Intensity Reading Lights (2)
  • Mirror
  • Opening Hatch with Sunshade
  • Opening, Screened Stainless Steel Portlights
  • Gas Shock added to Under Mattresses storage locker

Guest Stateroom

  • Wardrobe Locker
  • High Intensity Reading Lights (2)
  • Opening Hatch with Sunshade
  • Opening, Screened Stainless Steel Portlight
  • Storage Drawers
  • Two Single Berths with High Density Foam Mattresses

Head

  • All Molded Fiberglass Head – Durable and Easy to Clean
  • Built-in Vanity
  • Electric Head
  • Mirror
  • Opening Hatch with Sunshade
  • Opening, Screened Stainless Steel Portlight
  • Separate Enclosed Shower
  • Waste Tank Monitor
Electronics
  • Raymarine Quantum Q24D 24mile Dome Radar

Upper Helm

  • Raymarine RV9 Axiom Touchscreen Display GPS/Chart/Depth/Fish Finder/Radar
  • Side Power Bow Thruster Control
  • ACR Spot Light Control
  • Kenwood Stereo with 6 Speakers
  • Standard Horizon Explorer Marine VHF with GPS
  • Saturn Compass

Lower Helm

  • VHF Ram Mic Ram4 with Intercom
  • Side Power Bow Thruster Control
  • AutoHelm Tridata Display Depth/Speed/Trip
  • Saturn Compass
Electrical Equipment
  • (4) Batteries 500amp hour capacity
  • 50amp Battery Charger
  • AC/DC Converter
  • 50 amp Battery Safety Switches
  • AC and DC Control Panel
  • (2) 50ft, 30amp Shore Power Cords (2) – Fwd and Aft Connections
  • Bonding System with Transom-Mounted Zinc Anode
  • Circuit Breakers (AC/DC)
  • Color-Coded Wiring Harnesses
  • Electric Bilge Pumps with Auto Switch (3)
  • GFCI Protection Throughout
  • Interior Lights
  • Macerator with Overboard Discharge
  • Reverse Polarity Indicator
  • Water Heater
Deck, Bridge, and Cockpit
  • Stamoid Bimini Top with Complete Strataglass Enclosure (2020)
  • Magna Grill in Cockpit with Cover
  • Cockpit Rear Drop Sun Screen Canvas
  • Anchor Pulpit with Roller
  • (2) SuperMax Anchors
  • Sunbella Covers for Flybridge Seats and Instruments
  • Cable TV/Telephone Connection
  • Cleats – (2) Bow, (2) Spring, and (2) Stern
  • Courtesy Lights – Cockpit, Bridge, and Deck
  • Cockpit Storage
  • Flybridge Seating for 6+
  • Folding Table on Bridge
  • High Density Rub Rail with Stainless Steel Insert
  • Low Profile Bow Rail – Custom Aluminum
  • Molded Steps and Walkway to Bridge
  • Molded Swim Platform with Ladder
  • Split Compartment Anchor Locker
  • Safety Rails – Custom Aluminum
  • Sampson Post
  • Sliding Companionway Door
  • Swim Platform Shower – Freshwater
  • Venturi Windshield
Mechanical
  • Bronze Strut and Rudder
  • (3) Bilge Pumps
  • 4HP Side Power Bow Thruster
  • Racor 900 FG Fuel Polishing System with Water Detector
  • Engine Alarm System
  • Halon System
  • Freshwater Cooling on Engine
  • Fuel Filters
  • Hot and Cold Pressurized Water
  • Hydraulic Steering
  • Sea Strainer(s)
  • Seacocks on Underwater Thru-Hull Fittings
  • Stainless Steel Shaft – Aquamet
  • Trim Tabs
  • Welded Aluminum Fuel Tanks
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
2/13/26Initial price$139,000

Contact American Yachts

American Marine: Riviera Dunes/ Legacy Harbor/ Regatta Pointe, Corporate; 1065 Riverside Drive, Palmetto, FL, 34221

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Address

American Marine: Riviera Dunes/ Legacy Harbor/ Regatta Pointe
Corporate; 1065 Riverside Drive
Palmetto, FL 34221

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American Marine: Riviera Dunes/ Legacy Harbor/ Regatta Pointe, Corporate; 1065 Riverside Drive, Palmetto, FL, 34221

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