M 43 C

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As a generator drive unit for diesel-electric operation of electric motors, the M 43 has proved itself in service. The compact modular construction with less pipework, easy maintenance access to components, low fuel and lubricating oil consumption as well as extended life between main component overhauls – these have been the decisive factors for the high acceptance rate of the M 43 C. Since its introduction into the market, the MaK engine series M 43 C has achieved an outstanding position between marine applications as an in-line engine in 6, 7, 8 and 9 cylinder versions. More than 650 engines with a total power of more than 6,500 MW have already been sold, making the M 43 C the market leader in the 5–9 MW power class.

Generator Set Specifications

  • Minimum Rating 5754 kWe (7200 kVA) 5754 kWe (7200 kVA)
  • Maximum Rating 9063 kWe (11340 kVA) 9063 kWe (11340 kVA)
  • Emissions/Fuel Strategy EPA Tier 2 & IMO II EPA Tier 2 & IMO II

Engine Specifications

  • Configuration 6,7,8,9 Cylinder 6,7,8,9 Cylinder
  • Bore 16.93 in 430.0 mm
  • Stroke 24.02 in 610.0 mm
  • Swept Volume 5406.704 in³ 88.6 l/cyl

Generator Set Dimensions and Weights - Dependent on Generator Type

  • Height 6278 mm - 6649 mm (247.2 in - 261.8 in) 6278 mm - 6649 mm (247.2 in - 261.8 in)
  • Length 12202 mm - 14459 mm (480.4 in - 569.3 in) 12202 mm - 14459 mm (480.4 in - 569.3 in)
  • Weight 178 t - 240 t (392422 lbs - 529109 lbs) 178 t - 240 t (392422 lbs - 529109 lbs)
  • Width 3400 mm (133.9 in) 3400 mm (133.9 in)

Ease of installation

Engine with high safety level

The M 43 C is an engine with a high safety level, not only inside in terms of component life and availability but also with regard to external peripheral safety.

HFO/MDO anticipated TBO and life

Long maintenance intervals and extended life from the basis for low operating costs.

Complete engine

The engine is marketed with standardized pump and filter equipment.

M 43 C Standard Equipment

Air Inlet System

  • Air intake silencer / filter

Control System

  • Load sharing unit (for multiple engine plant only
  • Protection panel (emergency stop, override, reset push buttons)
  • Protection system
  • Serial link interface (MODbus/canbus)
  • Speed governor
  • Start/stop panel

Cooling System

  • Electric cooling water preheater
  • HT cooling water pump (engine driven)
  • 2-stage charge air cooler

Exhaust System

  • Exhaust gas expansion joint
  • Exhaust gas insulated manifolds
  • Turbocharger at counter-flywheel end

Fuel System

  • Fuel circulating pump (electric driven / for MDO/MGO only)
  • Fuel indicator filter
  • Fuel pressure valve (separate / for MDO/MGO only)


  • Control push buttons and lamps
  • Emergency stop lever
  • Local control panel
  • Pressure and temperature indicator

Lube System

  • Engine with dry sump
  • Lube oil duplex filter
  • Lube oil plate cooler (separate)
  • Lube oil pump (engine driven)
  • Lube oil self-cleaning filter (separate)
  • Oil sump in base frame
  • Pre-lubricating oil pump (electric driven / fitted on base frame)
  • Pressure regulating valve

Mounting System

  • Engine resiliently mounted on base frame, base frame mounted rigidly
  • Flexible pipe connections
  • High flexible coupling

Starting System

  • Electrical barring device
  • Starting air valve


  • Engine, flexible coupling and generator mounted on a common base frame
  • Flywheel cover
  • Lifting device (rental)
  • Torsional Vibration Calculation (TVC)

M 43 C Optional Equipment

Air Inlet System

  • Air inlet shut-off valve
  • Air intake transition piece
  • Expansion joint
  • Silencer / filter

Control System

  • Air injection control (for better load request)
  • Electronic speed governor
  • Engine alarm system
  • Remote indicators (start air pressure, engine speed, etc.)
  • Starter for electric driven pumps
  • 24 DC UPS

Cooling System

  • CW piping for generator cooling on base frame
  • CW piping for lubricating oil cooler on base frame
  • FW/SW plate cooler
  • HT cooling water pump (electric driven)
  • LT cooling water pump (electric driven)
  • Sea water cooling pump (electric driven)
  • Temperature control valve

Exhaust System

  • Silencer (with or without spark arrester)

Fuel System

  • Fuel oil cooler
  • HFO final preheater
  • HFO pressure regulating valve
  • HFO self-cleaning automatic filter
  • HFO supply and booster pumps (electrical driven)
  • HFO treatment and supply modules
  • HFO viscosity control device
  • Mixing tank

Lube System

  • Lube oil pump (electrical driven)
  • Lube oil treatment and combined modules
  • Temperature control valve

Mounting System

  • Resilient mounting on base frame

Starting System

  • Starting air compressor
  • Starting air receiver


  • Generator customer supply

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