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6S50ME-C9.6

Main Engine 2-Stroke · Main Engines (2-Stroke)

Technical data from manufacturer or class sources · not yet verified by a person
22,380 kWPower
6Cylinders
500 mmBore
2,000 mmStroke
127 rpmMCR RPM

The MAN 6S50ME-C9.6 is a low‑speed, six‑cylinder, two‑stroke marine diesel engine delivering up to 22 380 kW at 127 rpm, notable for its hydraulic valve actuation and advanced electronic control.

Inspection

Inspector Detail

Designation decoded

6 = Zylinderzahl, S = Super Long Stroke, 50 = Bohrung 500 mm, ME-C = MAN Electronically controlled Mark C, 9.6 = Mark 9.6 Steuerungsgeneration.

Background

Die 6S50ME-C9.6 ist die aktuelle Super-Long-Stroke-Variante der 50er-Plattform mit 6 Zylindern. S/B=4.0, hoehere Drehzahl als G50. Eine der meistgebauten ME-C-Konfigurationen weltweit.

Calculated metrics

Stroke to bore ratio4

Inspector checklist

Kraftstoffsystem
  • Kraftstoffpumpen: Plunger, Duesen
  • Cat-Fines: <15 ppm
  • VLSFO
Laufzeug und Tribologie
  • Laufbuchsen 500mm: Wear, BN, Honmuster
  • Kolbenringe: Gap, Laufflaeche
  • Kreuzkopf: S/B=4.0, moderate Belastung
  • Stopfbuchse: Drainage
ME-Steuerung
  • HPS 300 bar
  • FIVA Mark 9.6
  • CCU
Turbolader
  • Lagerspiel, Reinigung
  • Spuelluftdruck

Logbook reference values

ParameterExpectedDeviation means
Abgastemperatur320-420 Grad C>25 Grad C Spread
Spuelluftdruck1.8-3.2 barTC
Zylindeloelverbrauch0.7-1.2 g/kWhBN
OMD<2.5% LELStopfbuchse

Common Failure Modes

  • Cat-Fine-Schaeden

    Symptoms: Wear

    Causes: Separator

    Preventive: <15 ppm.

  • Cold Corrosion

    Symptoms: Wear

    Causes: BN

    Preventive: BN anpassen.

  • FIVA

    Symptoms: Timing

    Causes: Oel

    Preventive: HPS-Oel, FIVA 16000-24000 Bh.

Expert tips

  • 6S50ME-C: Arbeitspferd der globalen Handelsflotte, riesige Erfahrungsbasis.
  • S/B=4.0: Sweet Spot zwischen Effizienz und mechanischer Belastung.
  • Excellent Ersatzteilversorgung bei dieser Standard-Konfiguration.

Related components

  • Turbolader
  • Spuelluftkuehler
  • Separatoren
  • Alpha Lubricator (6)
  • HPS

Classification & regulatory

IMO Tier II. ECA: VLSFO/Scrubber.

Reference content for inspector orientation. Always verify against manufacturer's manual, latest service letters and class society requirements.

Documentation

Manuals

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