Mystic Seaport Museum will host the 34th Annual Antique Marine Engine Expo on August 16–17, 2025. One of the nation’s longest running and most celebrated events of its kind, the Expo will feature more than 300 exhibits showcasing the engineering marvels that once powered the world’s waterways.
Exhibitors from across the country will display a remarkable variety of pre-1973 electric, gasoline, and diesel marine engines, along with steam-powered models of all ages. Many of the engines will be running just as smoothly as the day they were built. Visitors can expect to see steamers huffing and puffing, inboards chugging on their stands, outboards splashing in rain barrels, and intricate models converting air pressure or electricity into rotary motion on workbenches and in the model pool.
Whether you’re a seasoned enthusiast or simply curious, this event offers a lively and fascinating look at the evolution of marine propulsion. Held in the Henry B. du Pont Preservation Shipyard, the Expo is a can’t-miss celebration of history, mechanics, and hands-on fun.
Show hours are 10:00 a.m.–5:00 p.m. on Saturday and 10:00 a.m.–3:00 p.m. on Sunday. The event is included with Museum admission and free for Museum Members.
The summer fun continues at the Museum with boat rides and historic trades demonstrations, Sabino Music Cruises, after-hours music at Schaefer’s Spouter Tavern, and more events, including:
Research, Design Construction, and Restoration of the Susan Constant, August 16, 10:30–11:30 a.m. (capacity 50)
Hear from Eric Speth, Captain of the Susan Constant, Godspeed, and Discovery, about the research, design, construction, and restoration of the historically accurate and fully operable Susan Constant. Following the presentation, Susan Constant will be available for viewing in the Henry B. du Pont Preservation Shipyard from 1:00 to 3:00 p.m. This event is included in general admission and free for Members.
Newfoundland Dog Water Rescue Demonstrations, August 23, 10:00 a.m.–3:00 p.m.
Witness trained Newfoundland dogs showcase their remarkable water rescue skills in partnership with the Land & Sea Newfoundland Training Group. This event is included in general admission and free for Members.
Family Field Day, August 30, 10:00 a.m.–5:00 p.m.
Wrap up summer with Family Field Day on the Museum’s Village Green with a joyful celebration of classic outdoor fun. Visitors of all ages will relive the timeless pleasures of sack races, bucket brigades, barrel rolling, and more. Bring the whole family and experience the simple joy of play, laughter, and shared memories. This event is included in general admission and free for Members. (rain date August 31)
For tickets and more information, visit mysticseaport.org.