MAN Engines

MAN in-line six-cylinder engine

MAN in-line six-cylinder engine

The current generation of MAN Engines in-line six-cylinder engines for the work boat industry

  • Comfort thanks to modern Common Rail system
  • Fuel efficient with state-of-the-art emissions compliance
  • Wide torque plateau for maximum efficiency

With the introduction of the engine generation based on the MAN D2676 with 12.4 l displacement, MAN Engines is modernising its product range of in-line six-cylinder engines for the work boat industry. For use in applications such as passenger ferries, pilot boats, fishing boats and lifeboats, a power range of 221 to 625 kW (301 to 850 HP) is available for light, medium and heavy duty operation.

The six-cylinder base engine has already been in use in numerous on- and off-road applications since 2007 and has proven itself hundreds of thousands of times. The robustness and reliability in the work boat industry has been further proven by extensive field testing over several thousand hours on 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 % fuel consumption reduction compared to the engine’s predecessors.

As part of this improvement in fuel consumption, all engines also comply with the current strict emission regulations. To achieve this, MAN Engines engages in close exchange of information with all required institutions, including the US Environmental Protection Agency (EPA) and the International Maritime Organization (IMO).

The new D2676 engines clearly show the wide torque plateau typical of MAN marine engines. The 368 kW (500 HP) engine, for example, provides 2,196 Nm between 1,400 and 1,600 rpm for heavy-duty operation and the most powerful variant 625 kW (850 HP) even provides 2,740 Nm between 1,400 and 2,100 rpm for light-duty operation. This allows maximum torque to be realised over a wide speed range with the lowest specific fuel consumption.

The MAN D2676 with 12.4 l displacement was developed for passenger ferries, pilot boats, fishing boats and lifeboats, among others.

For ship designers, the basic unit of the D2676 with dimensions of 1,800 x 922 x 1,103 mm (L x W x H) offers MAN’s usual compact dimensions – in this case with an even slimmer oil sump. At 1,200 kg (dry), the new engine generation also impresses with an even better power-to-weight ratio.

Optionally, the units are classified and available with keel cooling.

    D2676 LE4x6
(light duty)
D2676 LE43x / 42x
(medium duty)
D2676 LE4xx
(heavy duty)
Engine width mm 922 922 922
Engine length mm 1,800 1,800 1,800
Engine height mm 1,103 1,103 1,103
Engine height over crankshaft 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-igniter Self-igniter Self-igniter
Injection system   Common Rail Common Rail Common Rail
Engine control unit   EDC17 EDC17 EDC17
Direction of rotation looking at flywheel   Counterclockwise Counterclockwise Counterclockwise
Rated power according to ISO 1585; 89/491 EWG kW (HP) 537/588/625 (730/800/850) 412/441/478 (560/600/650) 221/290/331/368 (301/394/450/500)
Nominal speed rpm 2,300 2,100 1,800
Max. torque at nominal speed according to UN ECE-R120 Nm/ rpm see product brochure in the download area see product brochure in the download area see product brochure in the download area
Specific output kW/l 43.2/47.3/50.3 33.2/35.5/38.5 17.8/23.3/26.7/29.6
Exhaust status   see product brochure in the download area see product brochure in the download area see product brochure in the download area
Oil fill quantity 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
  2. Exhaust emission standard RCD 2013/53/EC does not apply to LE434

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