I found something about your Echo
www.everettboatworks.com
"1928 30 foot Fay & Brown launch ECHO. Restored in 1994 for Mary Wiliams, a warm-hearted delightful eccentric whose family had owned Echo camp on Raquette Lake. Mrs. Wiliams donated the boat to the Adirondack Museum in 1998."
and here in the search function of the museum

several campers being taken for a boat ride in the Fay & Bowen launch ECHO. Echo Camp, Raquette Lake. The "Echo" is being driven by Dean Pohl.
Echo Camp camper aquaplaning behind camp boat, ECHO, a Fay & Bowen launch.
Echo Camp campers lying on dock, with several boats in view including Fay & Bowen launch ECHO.
and
Gasoline launch ECHO built by the Fay and Bowen Engine Company of Geneva, NY. Mahogany planking on oak frames, varnished topsides, copper bottom. Carvel planked. Two cockpits. Forward has driver and passenger seats separate, and bench seat aft of it. After cockpit has bench seat at the stern and space for two wicker chairs (included in accession). Engine between two cockpits is a 4-cylinder Fay and Bowen . Plate reads "BUILT BY / FAY & BOWEN ENGINE CO./ GENEVA, NY, USA/ TYPE LN3 NO.10579."
L: 30 ft.
B: 81"
See accession folder for information on plates on magneto and distributor.
ECHO dates from the "roaring `Twenties," but she is not the boat Jay Gatsby and his Daisy would have preferred for a spin. Her builders were known for their conservative design. Their boats were reliable, smooth-running, elegant, and expensive, but not particularly fast or racy. At a time when Chris-Craft and other builders out in Michigan were experimenting with innovative planing hulls, Fay and Bowen stuck with their proven semi-displacement shape. As a result, they were not well-placed to weather the Depression, and two years after Echo was launched they went out of business.
Purchased new, ECHO was sent by rail to Raquette Lake, where she remained until coming to the museum. Her first owner was William H. Griffith, and he named her after the camp he had inherited from his wife's uncle, Connecticut governor Phineas C. Lounsbury. ECHO served the family for several decades, fetching visitors from the train station, taking family to the Church of the Good Shepherd on St. Hubert's Isle, and cruising with children and grandmother Griffith to picnic spots. She was driven and maintained by the family chauffeur. When Frances Clough bought the camp in 1945 and turned it into a girl's camp, ECHO was part of the deal. For the next four decades, she did the same duties for the campers.
ECHO had not aged gracefully when the donor, granddaughter of the original owner, bought her in 1987. A complete restoration included finding a four-cylinder, four-stroke-cycle 60 horsepower Fay and Bowen model LNS-43 engine, the same model she had when she left the factory. In the words of the builders, it "drives this big, handsome runabout at a speed of 21 miles per hour."