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Library› Engine Room› Main Engines (2-Stroke)› Main Engine 2-Stroke› MAN Energy Solutions 7S80ME-C9.6
MAN Energy Solutions

7S80ME-C9.6

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

Technical data from manufacturer or class sources · not yet verified by a person
71,400 kWPower
7Cylinders
800 mmBore
3,200 mmStroke
78 rpmMCR RPM

The MAN 7S80ME-C9.6 is a high‑power, low‑speed two‑stroke marine diesel engine (71 400 kW @ 78 rpm) featuring hydraulic camshaft replacement and advanced electronic control for superior fuel efficiency.

Inspection

Inspector Detail ✓ verified

Designation decoded

7 = Zylinderzahl, S = Super-Long-Stroke, 80 = Bohrung 800 mm, ME = elektronisch gesteuert, C = Compact, 9.6 = Engine Mark.

Background

Die 7S80ME-C9.6 mit 3200 mm Hub (Ratio 4.0) und 7 Zylindern ist die Super-Long-Stroke-Variante der 80er-Klasse. Höhere Drehzahl als G80 bei gleicher Bohrung. Für große Schiffe mit konventionellem Propeller.

Calculated metrics

Stroke to bore ratio4

Inspector checklist

Brennstoffsystem
  • 7 Injektoren: 800 mm Bore, Cat-Fines
  • Fuel-System
  • ME Timing
Laufzeug & Tribologie
  • Ratio 4.0 bei 800 mm: Hohe Absolutkräfte
  • Laufbuchsen: Verschleiß
  • Zylinderöl: BN
Steuerung & Hydraulik
  • 7 große HCUs
  • EICU 9.6
  • Hydrauliköl
Abgassystem
  • TC (2-3x)
  • Abgaskessel
  • Spülluft-Receiver
Fundament
  • 7S80: Großmotor, Deflection
  • Torsionsdämpfer
  • Fundament-Bolzen

Logbook reference values

ParameterExpectedDeviation means
Abgastemperatur nach Zylinder310-375 °C>20 °C → Einspritzung
P-max±5 barTiming
Spülluftdruck2.8-3.8 barTC
Kurbelwellen-Deflectiongemäß MAN S80 7-ZylAlignment
Hydrauliköl-Druck200-300 barHCU

Common Failure Modes

  • Cat-Fine-Schäden

    Symptoms: Liner-Verschleiß

    Causes: Cat-Fines

    Preventive: Separator

  • Torsionsschwingung bei S80

    Symptoms: Vibrationen

    Causes: Höhere Drehzahl + 7 Zyl

    Preventive: Torsionsgutachten; Dämpfer

  • Fundament

    Symptoms: Deflection

    Causes: Großmotor

    Preventive: Engmaschig messen

Expert tips

  • 7S80 ist kompakter als 7G80 — aber immer noch ein Großmotor >600 t. Fundament-Inspektion bleibt Pflicht.
  • Bei S80 höherer Drehzahl: Torsionsschwingungsverhalten prüfen. Torsionsgutachten muss vorhanden und gültig sein.
  • 7 Zylinder bei 800 mm: Guter Massenausgleich reduziert externe Kräfte, aber interne Kräfte (Guide-Shoes, Lager) bleiben hoch.

Related components

  • Turbolader (2-3x)
  • Separator
  • Torsionsdämpfer
  • Fundament
  • Guide-Shoes

Classification & regulatory

IMO Tier II/III. MARPOL Annex VI. EEDI Phase 2/3.

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

Documentation

Manuals

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