Antique Small Engine Collectors Club`s Wisconsin Engine Models

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 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-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 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-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 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-Cylinder Replaced TF for more HP. TE Obsoleted.
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		2-Cylinder, with firing order change for smoother running ( Replaced THD ).

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Last modified: 08 / 03 / 2005