MAN 35/44DF CD – dual fuel auxiliary genset with zero compromises
In the rapidly evolving marine market, a versatile auxiliary genset can make a difference to your ship’s economic and environmental performance. But only if it can provide a complete range of strengths: high power, fuel flexibility, low methane slip, future-proof technology, and competitive CAPEX and OPEX.
With its state-of-the-art engineering, the new MAN 35/44DF CD delivers the full spectrum. It can adapt to the most varied genset applications and is ready for future methanol use, CO2 reduction, and the “Fit for 55” climate package.
Higher power, better configuration, fewer gensets
The advantages of the powerful 560 kW/cylinder output are easy to demonstrate using a typical LNG carrier as an example. Instead of needing four gensets to cope with the high load demand of cargo unloading and port operation, (e.g. 2x6 + 2x8 cylinders at 480 kW), the work can be done with just three MAN 35/44DF CD GenSets (3x8 cylinders at 560 kW).
With this setup, the LNG carrier needs only one genset for normal operation. The other two are kept for cargo loading and unloading. This saves operation hours, fuel, and emissions, in particular methane slip. It also lowers investment costs and space requirements.
Technical specifications
| Power output | 560 kW/cylinder |
| Tier III emissions compliance | With SCR in diesel operation. No SCR needed for gas operation |
| Main gas fuels | Natural gas, biomethane |
| Main liquid fuels | MGO, MDO, diesel, or biofuel |
| Pilot fuels | MGO, synthetic diesel |
| Future fuels | Methanol ready |
The 35/44DF CD was developed in close collaboration with our licensee and is based on shipyard needs to meet all demands: low CAPEX, digitalization, easy integration, low emissions and full flexibility for the future, e.g. methanol operation.
Engineering the evolution together with our customers
From dual fuel reliability to full spectrum performance, the new genset is based on the MAN 35/44DF CR and MAN 32/44CR, proven with millions of hours in the field.
We have built on the base engine elements, which ensures the safety of the genset and low maintenance needs. We have also made upgrades to key application components, improving quality, making installation faster, lowering both CAPEX and OPEX, and generally making operation, installation, and maintenance more convenient.
The MAN 35/44DF CD is developed and tested together with the STX engine and allows licensees to implement their own sourcing concepts.
Upgraded components
- SaCoS 5000 – the engine control system ensures future-proof digitalization with CAPEX-optimized, state-of-the-art cybersecurity, available from 2025
- State-of-the-art cybersecurity – up to SL3
- Mk3 fuel injection system – robust design, with over 2,000 units in operation. Saves on cost and emissions, and is compatible with future fuels
- Pilot fuel oil pump – direct drive pump prevents blackouts and optimizes CAPEX
- Combustion strategy – increased power and reduced methane slip
- Cylinder top cover – modular design for easy maintenance of cylinder head, air intake and gas pipe, and full methanol upgrade
Low methane slip
We have made several important design changes: crevice volume is reduced, realized up to 35% engine load, and combustion process updated.
All these technologies are available as standard. All load points are secured with the lowest methane slip. You benefit from plug-and-play and worry less about engine adjustments. The result is up to 85% lower methane slip compared to current industry standards. Be ready for future regulations and taxes.
Download the factsheet
Contact our experts
Full spectrum of questions?
The perfect expert for your location
Rüdiger Schmidt
Head of Marine 4-Stroke Region Asia Pacific
ruediger.schmidt@man-es.com t +65 9248 5278Lex Nijsen
Head of Marine 4-Stroke Regions Europe and Americas
lex.nijsen@man-es.com t +49 1752 2587 00Waldemar Wiesner
Head of Marine 4-Stroke Region Middle East
waldemar.wiesner@man-es.com t +97 1504 5808 48Explore more topics
Discover the full spectrum of power in our MAN ExpertTalk
Learn about the new MAN 35/44DF CD featuring its technical features, methane slip reduction, operational benefits, and vessel integration enhancements.