Kahlenberg 4-Cylinder Marine Diesel Engine, 1927

Kahlenberg of Two Rivers, Wisconsin, built steam and gasoline marine engines before focusing on hot-bulb semi-diesel engines in the 1920s. This early four-cylinder example was purchased by United Fisheries of Sandusky, Ohio, in 1929 and likely used in a small commercial fishing tug. These engines were more efficient and reliable than steam power and were widely adopted on the Great Lakes.