The evolution the gas engine from the primitive, crude, one-cylinder apparatus of 1880 to the efficient modern machine of four, six, twelve, or more cylinders is a story of wonderful mechanical ingenuity and achievement. Througout the long period of development, the principles upon which the gas engine operates today--have remained the same--an explosive fuel, compression, and ignition.

3 1/2 HP "Ideal" engine with fuel injection  and patent water cooler, Circa 1905

Built in ten sizes, ranging from 2 to 25 horsepower, GS&M are of four cycle design.   This was further enhanced by the use of an auxiliary exhaust port, permitting a large  portion of the highly heated exhaust gases to travel out of the cylinder without unnecessarily overheating the exhaust valve. An independent push rod from the cam gear operates the fuel/injection pump-- this rod is also controlled by the engine governor.