Caterpillar Motoren designed the M 34 DF based on the reliable M 32 C engine series. It will be capable of operating on multiple fuels without sacrificing the typical MaK marine engine attributes. The M 34 DF will be capable of running on Liquid Natural Gas (LNG) as an alternative to the expensive low sulfur Marine Diesel Oil (MDO) or large and complex scrubber installations for ECA operation as of 2015. High efficiency and proven reliability make the M 34 DF an excellent generator set. Due to selected operation profiles and low diesel fuel costs, the M 34 DF is a preferred generator set regarding cost of operation.
| Minimum Rating | 2934 kWe (3672 kVA) 2934 kWe (3672 kVA) |
| Maximum Rating | 4574 kWe (5724 kVA) 4574 kWe (5724 kVA) |
| Emissions/Fuel Strategy | IMO II in diesel mode / IMO III in gas mode IMO II in diesel mode / IMO III in gas mode |
| Configuration | 6,8,9 Cylinder 6,8,9 Cylinder |
| Bore | 13.4 in 340 mm |
| Stroke | 18.1 in 460 mm |
| Swept Volume | 2563 in³ 42 l/cyl |
| Height | 4567 - 4770 mm (179.8 - 187.8 in) 4567 - 4770 mm (179.8 - 187.8 in) |
| Weight | 73 - 98 t (160937 - 216053 lbs) 73 - 98 t (160937 - 216053 lbs) |
| Width | 2600 mm (102.4 in) 2600 mm (102.4 in) |
| Length | 9566 - 11156 mm (376.6 - 439.2 in) 9566 - 11156 mm (376.6 - 439.2 in) |
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