Wisconsin Motor Manufacturing Company

The Wisconsin Motor Manufacturing Company of Milwaukee, Wisconsin, has been manufacturing internal combustion engines since 1909. In its early years Wisconsin made a full range of engines for automobiles, trucks, heavy construction machines, and maritime use. After 1930 it focused on small air-cooled engines widely used in agriculture and construction machines.

Wisconsin Engines (previously, Wisconsin Motors) continues to manufacture high quality engines.

March 12, 1909 Wisconsin Motor was incorporated by Charles H. John and Arthur F. Milbrath. By 1912 they employed about 300 people.
1937 Wisconsin Motor merged with Continental Motors Company but retained a separate identity.^[1]
1940 V series V4 engines introduced
1965 Ryan Aeronautical bought 50 per cent of Continental Motors Corporation^[2]
1969 Teledyne Technologies bought Continental Motors Corporation
1971 Fuji Heavy Industries, owner of Subaru, appointed Teledyne Wisconsin Motor US agents for their Robin engines
1992 Teledyne Total Power sold out to Nesco Incorporated^[3]
2010 Hydrogen Engine Center, Inc. and Wisconsin Motors Sign a Joint Venture^[4]
September 30, 2017 Subaru Corporation ended production of small engines.^[5]

Products

Small air-cooled engines

Wisconsin's fame came from its small air-cooled engines, such as AEH (used on generators, garden tractors, skidsteers tractors), AEN, and VF4.^[1] 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 2.4 to 65.9 horsepower (2 to 49 kW). There were single, inline two, V-two, and V-four cylinder models. The engines were designed for outdoor field service in industries including agriculture, construction, marine, oil-field equipment and railway maintenance.^[6] There are a wide range of variations in each engine family, including displacement, vertical and horizontal crankshafts, power ratings, and fuel used. Fuels can be gasoline, heating oil, kerosene, LPG, and CNG.

Howard Gem Rotavator with Wisconsin THD engine
Wisconsin auxiliary on a White M16 Multiple Gun Motor Carriage
Snapper Mower with Wisconsin W1-185 engine

Model	Type	Power	Displacement	Years	Notes
A1+1⁄2	single	2.4 hp (2 kW)	28 cu in (0.5 L)	1930-1934
AA	single	2.4 hp (2 kW)	10.9 cu in (0.2 L)
AB	single		13.5 cu in (0.2 L)
ABD	single
ABS	single		13.5 cu in (0.2 L)
ABSD	single
ABN	single		13.5 cu in (0.2 L)
ABND	single
AK	single		17.8 cu in (0.3 L)
AKD	single
AKS	single		17.8 cu in (0.3 L)
AKSD	single
AKN	single		17.8 cu in (0.3 L)
AKND	single
A3	single	5 hp (4 kW)	40 cu in (0.7 L)	1930-1934
A5	single	6 hp (4 kW)	44 cu in (0.7 L)	1930-1934
AGND^[7]	single	12.5 hp (9 kW)	38.5 cu in (0.6 L)	1957-1991
TE^[7]	I2	18 hp (13 kW)	45.9 cu in (0.8 L)
TF^[7]	I2	18 hp (13 kW)	53.9 cu in (0.9 L)
TH^[7]	I2	18 hp (13 kW)	53.9 cu in (0.9 L)
THD^[7]	I2	18 hp (13 kW)	53.9 cu in (0.9 L)	1957-1976+	generator
TJD^[7]	I2	18 hp (13 kW)	53.9 cu in (0.9 L)
VE4^[8]	V4	0 hp (0 kW)	91.9 cu in (1.5 L)
VE4D (Military Version)^[9]	V4	0 hp (0 kW)	91.9 cu in (1.5 L)
MVE4D (Military Version)^[10]	V4	0 hp (0 kW)	91.9 cu in (1.5 L)
VF4^[11]	V4	0 hp (0 kW)	107.7 cu in (1.8 L)
VF4D (Military Version)^[12]	V4	0 hp (0 kW)	107.7 cu in (1.8 L)
MVF4D (Military Version)^[13]	V4	0 hp (0 kW)	107.7 cu in (1.8 L)
MVG4D (Military Version)^[14]	V4	0 hp (0 kW)	148.5 cu in (2.4 L)
VH4^[15]	V4	0 hp (0 kW)	107.7 cu in (1.8 L)
VH4D^[16]	V4	30 hp (22 kW)	107.7 cu in (1.8 L)		70's Case\Bobcat skid-steer, pump
MVH4D (Military Version)^[17]	V4	0 hp (0 kW)	107.7 cu in (1.8 L)
S-7D^[18]	Single	0 hp (0 kW)	18.6 cu in (0.3 L)
S-8D^[19]	Single	0 hp (0 kW)	20.2 cu in (0.3 L)
S-14D^[20]	single	14.1 hp (11 kW)	33.1 cu in (0.5 L)	1968-	yard tractor
W2-1250	V2	30 hp (22 kW)	75 cu in (1.2 L)
V465D^[21]	V4	65.9 hp (49 kW)	177 cu in (2.9 L)		air comp., trencher, swather
W1-080	single
W1-125	single				Vertical and Horizontal- mowers, generator, tiller, pump, etc.
W1-145	single	4 hp (3 kW)		197?-198?	Vertical and Horizontal- mowers, generator, tiller, pump, etc.
W1-185	single	5 hp (4 kW)		197?-199?	Vertical and Horizontal- mowers, generator, tiller, pump, etc.
W1-390v	single	7.5 hp (6 kW)			Vertical - mowers, generator, tiller, pump, etc.
W1-450v	single	10 hp (7 kW)		early 1990s	Vertical - mowers, generator, tiller, pump, etc.
W1-588	single

Engines for cars and trucks

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.^[1] Between 1945 and 1965 King Midget Cars used a Wisconsin AENL single cylinder engine in their micro car.