Seaglass - MAINSHIP FOR SALE

1999 Mainship 350 Trawler — Seaglass

The 1999 Mainship 350 Trawler, Seaglass, is a coveted single-engine cruising trawler that blends efficiency, sophistication, and stress-free operation. Driven by a reliable 300hp Caterpillar 3116, she offers thrifty, confident performance, complemented by a Kohler 8kW generator showing 1,215 hours to support extended time at anchor. Practical touches such as the Oil X-Change-R system and a Racor fuel polishing setup underscore her thoughtful, go-anywhere pedigree.

Purpose-built for the Great Loop, coastal cruising, or comfortable liveaboard life, this flybridge trawler wraps you in year-round comfort with dual-zone reverse-cycle air conditioning (16k and 12k BTU). The inviting salon showcases warm cherry joinery and tastefully updated furniture (2022), while the well-appointed galley features Corian countertops and the storage you expect in a true motor yacht. A private owner’s stateroom with an island berth anchors the accommodations, joined by a guest cabin with twin berths and a separate enclosed shower—ideal for a cruising couple hosting family or friends.

On deck, the flybridge is fully sheltered by a Stamoid Bimini and a complete Strataglass enclosure (2020), creating a commanding, all-weather helm. Easy handling is assured with a Side-Power 4HP bow thruster, a windlass with dual anchors, and both upper and lower helm stations for versatile operation. Updated electronics include a Raymarine Axiom RV9 touchscreen with Quantum radar and VHF with RAM mic, giving you clear, modern navigation whether passagemaking or harbor hopping.

Well-outfitted, carefully maintained, and laden with desirable factory options, Seaglass stands out as an exceptional value in the 35-foot cruising trawler arena. For those seeking a refined trawler yacht—part liveaboard cruiser, part coastal cruiser, part diesel powerboat—this capable, economical passagemaker is a prime Great Loop boat and a timeless Mainship classic.

Factory installed options

Delivered with purposeful capability, this yacht features dual-zone air conditioning with reverse-cycle heat for year-round comfort, a Kohler 8 kW diesel generator showing 1,215 hours to power systems at anchor, a remotely controlled spotlight for precise night maneuvering, a dependable windlass to handle ground tackle with ease, and an Oil X-Change-R system that makes clean, efficient engine oil service a simple onboard task.

Accommodations

The salon welcomes you with a 16,000 BTU air conditioning system and a warm cherry interior, complemented by a color television wired for cable, a flat screen TV, and a stereo system with CD to set the mood. New salon furniture—chairs and table added in 2022—sits beneath LED lights and comprehensive interior lighting, all framed by a full windshield with wipers, a large sliding door to the cockpit with screen, an opening center window, and sliding windows with screens. The lower station presents full instrumentation for command in any weather, while Phifertex salon window covers with heat barrier panels tame the sun with elegant efficiency. The galley elevates culinary ease with Corian counters, a portable Frigidaire ice maker from 2021, and a designer faucet fitted in 2022, paired with a full-size NovaKool refrigerator/freezer running on AC/DC power. An oversize galley sink with cutting board, overhead cabinets, under-counter storage, a Princess three-burner range with oven, a microwave, and LED lights complete a space that is as practical as it is refined. The master stateroom centers on a generous island bed with an inner spring mattress and its own 12,000 BTU air conditioning system, flanked by two cedar-lined wardrobe lockers and drawers under the berth. LED lighting and two high-intensity reading lights illuminate the space, joined by a mirror, an opening hatch with sunshade, opening screened stainless steel portlights, and a gas shock added to the storage locker beneath the mattresses for fingertip access. The guest stateroom provides a restful retreat with a wardrobe locker, two high-intensity reading lights, an opening hatch with sunshade, an opening screened stainless steel portlight, storage drawers, and two single berths with high-density foam mattresses for supportive sleep. The head is fully molded fiberglass for durability and easy cleaning, with a built-in vanity, electric head, mirror, opening hatch with sunshade, opening screened stainless steel portlight, a separate enclosed shower, and a waste tank monitor to keep systems shipshape.

Electronics

A Raymarine Quantum Q24D 24-mile dome radar anchors the suite. At the upper helm, a Raymarine RV9 Axiom touchscreen unites GPS, charting, depth, fish finder, and radar views, while Side Power bow thruster control and ACR spotlight control put precision at your fingertips. Entertainment and communications are delivered by a Kenwood stereo with 6 speakers and a Standard Horizon Explorer marine VHF with GPS, all guided true by a Saturn compass. At the lower helm, a VHF Ram Mic Ram4 with intercom keeps the conversation flowing, mirrored by a second Side Power bow thruster control, an AutoHelm Tridata display for depth, speed, and trip, and a Saturn compass for steady bearings.

Electrical equipment

Power management is robust and well organized, beginning with four batteries offering 500 amp-hour capacity, a 50 amp battery charger, an AC/DC converter, and 50 amp battery safety switches overseen by AC and DC control panels. Shore power arrives via two 50 ft, 30 amp shore power cords with forward and aft connections, protected by a bonding system with transom-mounted zinc anode, circuit breakers for AC/DC, and color-coded wiring harnesses that simplify tracing. Three electric bilge pumps with auto switch provide dependable dewatering, complemented by GFCI protection throughout, interior lights, a macerator with overboard discharge, a reverse polarity indicator, and a water heater for everyday comfort.

Deck, bridge, and cockpit

Designed for open-air enjoyment and confident handling, the exterior features a Stamoid bimini top with complete Strataglass enclosure from 2020, a Magna grill in the cockpit with cover, and a cockpit rear drop sun screen canvas to temper bright days. Ground tackle is handled with authority by an anchor pulpit with roller and two SuperMax anchors, supported by a split-compartment anchor locker and a stout Sampson post. Protection and polish come from Sunbella covers for flybridge seats and instruments, courtesy lights across cockpit, bridge, and deck, and a high-density rub rail with stainless steel insert. Dockside convenience is enhanced by cable TV/telephone connection, while low-profile custom aluminum bow rails and matching custom aluminum safety rails frame molded steps and a walkway to the bridge. The flybridge seats six plus with a folding table for relaxed gatherings, and movement aboard is effortless via a molded swim platform with ladder, a sliding companionway door, a freshwater swim platform shower, abundant cockpit storage, and a sleek Venturi windshield to deflect the breeze. Cleats are precisely placed—two bow, two spring, and two stern—for secure mooring.

Mechanical

Beneath the waterline and at the helm, mechanical systems are specified for strength and control, including bronze strut and rudder, a Side Power bow thruster rated at 4 HP, and three bilge pumps for consistent dewatering. Fuel is kept pristine by a Racor 900 FG fuel polishing system with water detector and dedicated fuel filters, while the engine benefits from freshwater cooling, an engine alarm system, and a Halon system for onboard fire suppression. Hydraulic steering pairs with trim tabs for precise running attitude, sea strainers and seacocks on underwater thru-hull fittings safeguard vital intakes, and an Aquamet stainless steel shaft transmits power with enduring reliability. Welded aluminum fuel tanks round out a robust, serviceable installation designed for real-world cruising.