Wisconsin Motor Manufacturing Company


The Wisconsin Motor Manufacturing Company of Milwaukee, Wisconsin, manufactured internal combustion engines. The company was incorporated in 1909 and in its early years made a full range of engines for heavy construction equipment through cars down to garden tractors. After 1930 it focused on small air-cooled engines.
Wisconsin passed through the hands of a number of owners and production seems to have ceased in 2017.
;Subsequent names for the same business under different owners

Small air-cooled engines

Wisconsin's fame came from its small air-cooled engines, such as AEH, AEN, and VF4.
In the 1950s they were able to claim they were the world's largest manufacturer of heavy-duty air-cooled engines. All Wisconsin's products were 4-cycle and they had power outputs from 3 to 30 hp. There were one, two and four cylinder models. The engines were designed for outdoor field service in industries including agriculture, construction, oil-field equipment and railway maintenance
Designation — Displacement — Cylinders — HP
Their four and six cylinder engines were used in heavy construction equipment, for example that made by Bucyrus-Erie but new automobile companies bought them for their big cars. The Stutz Bearcat car was available with either Wisconsin's four-cylinder Type A or their six-cylinder engine. Both engines were rated at 60 horsepower. Stutz began to build their own engines in 1917. Pierce-Arrow was among other customers for Wisconsin engines. Wisconsin engines also powered the trucks made by The FWD Corporation.

Owners

Wisconsin Motor was incorporated March 12, 1909 by Charles H. John and Arthur F. Milbrath. By 1912 they employed about 300 people.
Wisconsin Motor merged with Continental Motors Company in 1937 but retained a separate identity.
In late 2017 Subaru Corporation ended production and sale of their small multi-purpose engines.