Hyundai built under license of a MAN B&W 12K98MC marine propulsion engine
12 in the engine code is 12 cylinders or units
K is the engine code
98 is the piston diameter in this case 98cm
MC is engine series
The stroke of the engine is 2800cm or almost 10 feet! The piston travels straight up and down and is connected to a 2nd connecting rod that rotates with the crankshaft