c. 1910s to 1920s Associated 2 1/2 HP Engine

 This engine (serial # 164632) was made by the Associated Manufacturers Company in Waterloo, Iowa. Referred to a the "Hired Man," this engine was initially developed by 1910 as a 2 1/4 HP engine. It was rerated at 2 1/2 HP by 1917.
 The Associated Manufacturers Company was incorporated in 1910 when Iowa Dairy Separator Company merged with other Waterloo area firms. Initially organized in 1896 to make hand-operated cream separators, the Iowa Dairy Separator company began developing engines by 1909. In 1913, the Associated line of engines was in full production. In 1946, the company was sold to Hamilton Engineering Company.

Notes

C. H. Wendel. American Gasoline Engines Since 1872. Edited by George H. Dammann. Sarasota, FL: Crestline Publishing Co., 1983, p. 35.