Hydromotor / Hydrometer

The Hydromotor, also known as the Hydrometer, was an amphibious automobile produced between 1914 and 1917 by the Automobile Boat Manufacturing Company of Seattle, Washington.

The vehicle was contemporary with the Hydrocar, another amphibious design of the period, but differed in that it traveled in the same direction whether on land or in water. The prototype was fitted with a Haynes engine, while production examples were intended to use Continental power plants. Its body was more boat-like in form than that of the Hydrocar, featuring a streamlined shape with a rudder mounted at the rear, just behind the propeller.

The manufacturer claimed top speeds of 60 miles per hour (97 km/h) on land and 25 miles per hour (40 km/h) in water. The Hydrometer was announced in roadster, tourer, limousine, and light delivery configurations, priced between 2,000 and 3,000 dollars, although it is unlikely that all of these body styles were actually produced.

In 1916, the vehicle was briefly marketed under the name Delia. By 1917, the factory was reported to be prepared for full production, but no further developments were recorded, and the venture appears to have ended without significant output.