MAN inline six-cylinder engine

MAN Engines for Commercial Shipping

The next generation of MAN inline six-cylinder engines for work boats

MAN D2676

Modern common rail system ensures comfort

Fuel-efficient and compliant with latest emissions standards

Wide torque plateau for maximum efficiency

MAN Engines is set to modernize its range of inline six-cylinder engines for work boats with the launch of the latest generation of engines based on the MAN D2676 with cylinder capacity of 12.4 l. Designed for use in vessels such as passenger ferries, pilot boats, fishing trawlers and lifeboats, the engine provides a range of outputs from 323 kW to 588 kW (440 to 800 hp) for light, medium and heavy operations.

The basic six-cylinder engine has been tried and tested many hundreds of thousands of times in a wide range of on- and off-road machinery since it was first introduced in 2007. Its robustness and reliability in work boats has also been demonstrated in extensive field trials over several thousand hours of use in ferries, pilot boats and high-speed catamarans.

The modern common rail injection system used in the D2676, with fuel pressures up to 1,800 bar, ensures high mean pressures and optimized combustion. This increases on-board comfort due to reduced vibration and noise emissions. The inclusion of a Miller or Atkinson camshaft has helped to achieve an average 10% reduction in fuel consumption compared to the engine’s predecessors.

As part of this improvement in fuel consumption, all engines also comply with the current strict emissions legislation. To achieve this, MAN Engines engages in close exchange of information with all required institutions, in-cluding the US Environmental Protection Agency (EPA) and the Interna-tional Maritime Organization (IMO).

The new D2676 engines also offer the wide torque plateau that is characteristic for MAN marine engines. The 323 kW (440 hp) power unit provides 1,950 Nm of torque between 1,200 and 1,600 rpm for heavy operations, while the 588 kW (800 hp) high-performance model manages to generate 2,700 Nm between 1,200 and 2,100 rpm for light operations. This ensures maximum torque over a broad engine speed range at the lowest specific fuel consumption.

MAN D2676
The MAN D2676 is designed for use in vessels such as passenger ferries, pilot boats, fishing trawlers and lifeboats.

For naval architects, the basic MAN D2676 unit measures a typically compact 1,800 x 922 x 1,103 mm (L x B x H), and this model even has a more streamlined oil sump design. With a dry weight of 1,200 kg, the new gener-ation of engines also has an improved power to weight ratio.

The following D2676 models are available: For light operations: 537 kW (730 hp), 588 kW (800 hp); for medium operations: 412 kW (560 hp), 478 kW (650 hp); for heavy operations: 323 kW (440 hp), 382 kW (520 hp).

The new MAN D2676 marine diesel engines replace the predecessor models D2866 and D2876 with immediate effect and are already available to order. Optionally, the units can be classified and supplied with a keel cooling system.

    D2676 LE4x3 D2676 LE4x5 D2676 LE4x4
Engine width mm 922 922 922
Engine length mm 1.800 1.800 1.800
Engine height mm 704 704 704
Weight (dry) kg 1.215 1.215 1.215
Max. permissible oblique position, axial/transverse (inclination when installed considered) ° 7,5°/22,5° 7,5°/22,5° 7,5°/22,5°
Cylinder arrangement   In-line In-line In-line
Number of cylinders   6 6 6
Bore mm 126 126 126
Stroke mm 166 166 166
Displacement l 12,42 12,42 12,42
Operating mode   Four-stroke diesel engine Four-stroke diesel engine Four-stroke diesel engine
Combustion process   Self-ignition Self-ignition Self-ignition
Injection system   Common Rail Common Rail Common Rail
Engine control unit   EDC7 EDC7 EDC7
Direction of rotation looking at flywheel   Anti-clockwise Anti-clockwise Anti-clockwise
Rated power acc. to ISO 1585; 89/491 EWG   537 / 588
(730 / 800)
412 / 478
(560 / 650)
324 / 382
(440 / 520)
Rated speed rpm 2.300 2.100 1.800
Max. torque at rated speed acc. to UN ECE-R120 Nm/
2.450 / 2.674
1.300-2.100 / 1.400-2.000
2.065 / 2.402
1.300-1.900 / 1.200-1.900
1.925 / 2.270
Specific output kW/l 43,2 / 47,3 33,2 / 38,5 26,1 / 30,8
Exhaust status   IMO Tier 2, RCD 2013/53/EC, EPA Tier 3 (commercial), 97/68/EC IMO Tier 2, RCD 2013/53/EC, EPA Tier 3 commercial, 97/68/EC IMO Tier 2, RCD 2013/53/EC, EPA Tier 3 commercial, 97/68/EC
Oil filling without/with filter l 34 min/40 max 34 min/40 max 34 min/40 max
  1. Subject to technical changes due to further development