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Dark Harbor Boat Yard is a full service boat yard located in Penobscot Bay on 700 Hundred Acre Island within the Town of Islesboro, Maine. Dark Harbor offers the following services: Outboard Service, Gas and Diesel Mechanical Service, Electronics installation and service, Carpentry, Sailboat rigging,Paint and Varnish repair, Fiber Glass Repair, General Polishing/Wax/Cleaning and Inside Winter Storage. Floats – We can provided new construction and all needed yearly maintenance Besides offering fuel, moorings, boat maintenance and repairs; we also have showers, laundry, ice and a fully stocked marine store.