The Onan two-cylinder gas engine is used in Cummins Onan generators to provide power when unable to pull from a regular electrical grid. While different models provide different voltages and amperages, there are some specifications that all two-cylinder Onan gas engines share.
Bore
The Onan gas engine has an 80 millimeter (mm) bore. This means that both of its cylinders have diameters of 80mm.
Stroke
The stroke is the distance the piston inside each cylinder moves. The Onan gas engine has a stroke of 65mm.
Compression Ratio
The Onan has a compression ration of eight to one. This means that the volume of gas inside the cylinder when the piston is as low as it can go is eight times the volume of gas inside the cylinder when the piston is as high as it can go.
Capacity
The engine has a capacity of 2 qts. of lubricating oil. This includes the oil capacity of the oil filter.
Starter
The engine starts with a 12V starter. The starter can be engaged manually or with a remote control.
Maximum Power
The engine can reach a maximum of 2,400 revolutions per minute (RPM). At this speed, it produces 11.6 horsepower.
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