The Hercules Gas Engine Company of Evansville, Indiana was in business from 1914 to 1934.  The only engines they built were Single Cylinder Engines.  There were at least two other Hercules Companies that built engines.   One was located in California and I believe is no longer in business, the other is located in Canton, Ohio.  They were in business until sometime in 1999.  Their assets were purchased by another company going by the name of Hercules Engine Components and are selling parts.  The last I knew they could be reached at 330-830-2498.


I have also been told that Jerry Biro, P.O. Box 206, Martinsburg, OH 43037. Phone 740-745-1475 is selling parts for some of their engines. 

A source of some manuals is:

This company contacted me and indicated that they makes Hercules engine parts, such as  pistons, piston rings, gaskets, valves, rod and main bearings. They do camshaft restoration, lifter grinding, cracked head and block repairs.  Visit their web site       Jack H. Bunton President CEO    MBWA

You also might try here:

I had someone e-mail me and said that they had bought some part from:
M&M Surplus Sales
807 Zerega Ave.
Bronx, NY  10473
(845) 469-3597

Ask for Danny


Mills Motor Parts

2727 Linwood Ave, Shreveport, La 71103

318-635-3504 or 318-635-3546(Fax)
Call 1-800-624-7999
or email us at


Try this web site too for additional sources:


If anyone knows of other parties that supply parts or info on these engines please contact me and I will post that information here.

Return to the main page.