Cylinders: 12 V @ 90° Bore & Stroke (mm): 150×150 Total Displacement (L): 31.8 Compression Ratio: 15/1 Engine Rotation: Counterclockwise Idle Speed (RPM): 650 Flywheel: 18″ Flywheel Housing: SAE 0 Certifications: IMO II | EPA 3 | RCD 2