Menasco C-4 was a enlarged B-4 with the bore increased from
4.5 to 4.75 inches. The C-4 was called the "Pirate",
Menasco's trade name for its four-cylinder line.
The U.S. Military designation for the Menasco C-4 was the
|Four cylinder, air-cooled, in-line, inverted|
|Displacement: 363 cubic inches (5.9 liters)|
|Bore x stroke: 4.75 x 5.125 inches|