Hercules Engine News

Including Economy, Arco, Jaeger & Thermoil

Content Tools

20601 Old State Rd., Haubstadt, IN 47639

The question frequently comes up in regard to determining the year that Hercules and related engines were built. Records no longer exist. Records at defunct Servel, Inc., were destroyed when the Whirlpool Corporation took over the plant facilities in 1957. The records at the Hercules Body Works, where replacement parts were supplied from, were disposed of in 1955 when the business was sold to a new owner. What is left now is the putting together of bits and pieces of information to form a guideline for dating the engines. Information used includes:

1. News articles relating to annual engine production.

2. Dated instruction and parts books.

3. Casting dates beginning in late 1924.

4. Illustrations in Sears & Roebuck catalogs.

5. Model letters stamped on the engine tags.

Using information from the above plus some less easily explained clues, the following guide was developed. It is a guide and only that. It is most accurate on the small size engines and least accurate on the larger sizes.

Below is an estimate of production and the years produced:

All Sparta

40,000

1909 to 1913

Model D

10,000

First half of 1914

Model EW

Included/E

1914 into 1915

Model E

225,000

Last half 1914 into 1923

Model F

20,000

Late 1921 into 1923

Model FW

25,000

Early 1923 into 1924

Model G

5,000

1923 into 1924

Model H

10,000

Late 1923 into 1925

(Note that most of the models GH and the Jaegers with no model letter on the tag belong in the above two groups.)

Model N

5,000

Primarily 1923 and 1924

Model S

60,000

Late 1924 into 1929

Model X

18,000

1928 to 1932

Model J

11,000

1930 to 1934

Below is a serial number guide for dating engines. It may conflict slightly with the information shown above.

1914

All D Models

1914

50,000 to 60,000

1915

60,000 to 80,000

1916

80,000 to 105,000

1917

110,000 to 130,000

1918

130,000 to 165,000

1919

165,000 to 200,000

1920

200,000 to 235,000

1921

235,000 to 265,000

1922

265,000 to 280,000

1923

280,000 to 300,000

1924

300,000 to 319,000

1925

319,000 to 334,000

1926

334,000 to 352,000

1927

352,000 to 365,000

1928

365,000 to 372,000

 

0 to 7,000 X Models

1929

372,000 to 376,000

 

7,000 to 18,000 X Models

1930

0 to 4,600 J Models

1931

4,600 to 7,500 J Models

1932

7,500 to 9,200 J Models

1933 & 1934

9,200 to 10,500 J Models