Serial Numbers of Hercules Built Engines
and their approximate year of manufacture.

Year

For all Models
Except X and J Series

1914

  Model D engines SN located
on the end of the crankshaft.
Some Model D engines
don't have a SN.
Year Serial Number Range
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
1929 372,000 to 376,000
Year

All X Models
1928 0 to 7,000
1929 7,000 to 18,000
Year All J Models
1930 0 to 4,600
1931 4,600 to 7,500
1932 7,500 to 9,200
1933 & 34 9,200 to 10,500

These dates are to be used as a guide only. These are approximate dates compiled by research done by Glenn Karch.
If you have a better date he recommends that you use it.  Please register your Hercules built engine.

To correspond with other Hercules/Economy etc. engine enthusiasts,
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