Information on Engine Models

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I got this from an employee at the factory in Memphis, Tennessee in May, 2001.  There are some known errors but I have left the list as he sent it to me.  I have marked known errors with a red asterisk (*), and detailed them at the end.  If you catch one (or more) that I have missed, please let me know.

 

Wisconsin Air-Cooled  Motors, from list received May 22, 2001

 

Model

Bore & Stroke

Horsepower  @  RPM

Introduced

Discontinued

Remarks

A 1-1/2

2-3/4 X 3-1/4

2.4 @ 1800

1930

1934

L Head  Air Vane Governor  Flywheel Magneto

A 2

3 X 3-1/4

3.0 @ 1800

1930

1934

 

A 3

3-1/4 X 4

5.0 @ 1800

1930

1934

 

A 4

3-1/2X4

5.7 @ 1800

1930

1934

 

A 5

3-1/2X4

6.0 @ 1800

1930

1934

 

AD

2-3/4 X 3-1/4

3.7 @ 2400

1933

1941

L Head  Air Vane Governor  Outboard Magneto (Designed for Pump Mfrs.)

AE

3 X 3-1/4

4.2 @ 2400

1933

1941

 

AES

3 X 3-1/4

6.5 @ 3200

1933

1941

 

AC4

2-5/8 X 3-1/4

16 @ 2600

1934

  1945 *

First 4-cyl. in-line air-cooled valve-in-head engine.

AF

3-1/4 X 4

5.4 @ 2000

1935

1941

L-Head  Air Vane Governor  Outboard Magneto

AG

3-1/2 X 4

6.1 @ 2000

1935

1941

 

AH

3-5/8 X 4

8.0 @ 2200

1935

1941

 

AA

2-1/4 X 2-3/4

1.8 @ 2600

1936

1949

L-Head  Mechanical Governor Outboard Magneto

AB

2-1/2 X 2-3/4

3.0 @ 2600

1936

1949

 

AM4

3-1/4 X 4

28.0 @ 2200

1938

1944

Four-Cyl. Valve-in-head.  Part of AC4 Family but more HP.

AP4

3-1/2 X 4

31.0 @ 2200

1938

1944

 

AK

2-7/8 X 2-3/4

4.1 @ 2400

1939

1955

Addition to AA & AB Family

VD4

2-3/4 X 3-1/4

16.0 @ 2600

1940

 

4-cyl.,L-head, V-Type

VE4D

3 X 3-1/4

21.5 @ 2400

1940

1969

 

VF4D

3-1/4 X 3-1/4

25.0 @ 2400

1940

1976

 

ADH

2-3/4 X 3-1/4

4.5 @ 2200

1941

1949

L-Head  Mechanical Governor  Outboard Magneto  (Replaced AD, AE, AF, AG, and AH)

AEH

3 X 3-1/4

5.9 @ 2200

1941

1949

 

AFH

3-1/4 X 4

7.2 @ 2200

1941

1957

 

AGH

3-1/2 X 4

8.4 @ 2200

1941

1957

 

AHH

3-5/8 X 4

9.2 @ 2200

1941

1957

 

VM4

3-1/4 X 4

27.0 @ 2200

1944

1953

4-Cly. L-Head V-Type  (Replaced AM4 & AP4)

VP4

3-1/2 X 4

31.0 @ 2200

1944

1953

 

TE

3 X 3-1/4

11.2 @ 2600

1946

1957

2-Cyl. L-Head Addition VE4-VF4 Family (same blocks, pistons and rods).

TF

3-1/2 X 3-1/4

14.6 @ 2600

1946

1957

 

ABN

2-1/2 X 2-3/4

4.6 @ 3600

1949

1955

L-Head, higher compression ratio (replaced AB & AK to keep pace w/improved fuels).  AA obsoleted.

AKN

2-7/8 X 2-3/4

6.2 @ 3600

1949

1955

 

AEN

3 X 3-1/4

8.2 @ 3600

1949

1957

Higher speed, increased power (replaced AEH).  ADH was obsoleted.

VG4D

3-1/2 X 4

37.0 @ 2400

1953

 

4-Cyl.,L-head, V-Type.  Improved on VP4.  VM4 was obsoleted.

VR4D

4-1/4 X 4-1/2

56.5 @ 2200

1953

1960

4-Cyl., L-Head, V-Type for increased HP

ACN

2-5/8 X 2-3/4

6.0 @ 3600

1955

 

Replaced ABN and AKN for greater HP.

BKN

2-7/8 X 2-3/4

7.0 @ 3600

1955

 

 

VH4D

3-1/4 X 3-1/4

30.0 @ 2800

1956

 

4-Cyl., Even-Firing Addition to VE4D and VF4D Family.

AGND

3-1/2 X 4

12.5 @ 3200

1957

 

Replaced AHH for more HP.  AFH & AGH obsoleted.

AENL

3 X 3-1/4

9.2 @ 3600

1957

 

Replaced AEN for more HP.

THD

3-1/4 X 3-1/4

16.8 @ 3600

1957

1976

2-cyl.  Replaced TF for more HP.  TE Obsoleted.

V-461D

3-1/2 X 4

60.5 @ 3600

1960

1970

4-Cyl. V-Type, Valve-in-Head - Replaced VR4D.

S-7D

3 X 2-5/8

7.2 @ 3600

1962

1974

Simplified construction for better cost advantage.

S-8D

3-1/8 X 2-5/8

8.2 @ 3600

1963

 

Addition to S-7D family for more HP.

S-10D

3-1/4 X 3

10.5 @ 3600

1963

1976

Simplified construction for better cost advantage.

S-12D

3-1/2 X 3

12.5 @ 3600

1964

 

Addition to S-10D family for more HP.

TRA-10D

3-1/8 X 2-5/8

10.1 @ 3600

1964

1976

Originally designed for tractor applications.

V465D

3-3/4 X 4

65.9 @ 3000

1967

 

Additioon to VB-461D family - more HP.

TRA-12D

3-1/2 X 2-7/8

12.0 @ 3600

1968

 

Addition to TRA-10D family - More HP.

S-14D

3-3/4 X 3

14.1 @ 3600

1968

 

Addition to S-10D,S-12D family - more HP.

TJD

3-1/4 X 3

16.8 @ 3600

1968

 

2-Cyl. W/firing order change for smoother running (repl'd THD).

 

* - AC4 End date is listed as 1945, but I know of one on an Ariens tiller with a build date of 1953.

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