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Wisconsin Engine
Models

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Wisconsin Air-Cooled Motors, from list received May 22, 2001
Model Bore & Stroke Horsepower @ RPM Year Introduced Year 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 3-1/2 x 4 5.7 @ 1800 1930 1934  
A 5 3-1/2 x 4 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-Cylinder 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, Air Vane 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 4-Cylinder, 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-Cylinder, L-head, V-Type
VE4D 3 x 3-1/4 21.5 @ 2400 1940 1969  
VF4D 3 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 Mag.
( 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-Cylinder, 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 to 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 obsolete.
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 obsolete.
VG4D 3-1/2 x 4 37.0 @ 2400 1953   4-Cyl.,L-head, V-Type. Improved on VP4.
VM4 obsolete.
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-Cylinder, 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 obsolete.
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-Cylinder Replaced TF for more HP.
TE Obsolete.
V-461D 3-1/2 x 4 60.5 @ 3600 1960 1970 4-Cylinder 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   Addition 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   Firing order change for smoother running ( Replaced THD ).


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