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Library› Engine Room› Main Engines (2-Stroke)› Main Engine 2-Stroke› MAN Energy Solutions 7S80ME-GA10
MAN Energy Solutions

7S80ME-GA10

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-GA10 is a high‑power, low‑speed two‑stroke marine diesel engine with dual‑fuel capability (HFO/VLSFO/MDO and gas such as ethane or LNG), delivering up to 71.4 MW at 78 rpm.

Inspection

Inspector Detail ✓ verified

Designation decoded

7 steht für 7 Zylinder, S für Super-Long-Stroke, 80 für 800 mm Bohrung, ME-GA für Ethan-fähige Gaseinspritzung, 10 für Mark 10.

Background

Die S80ME-GA10 mit 7 Zylindern ist ein Großmotor der ME-GA-Reihe. 800 mm Bohrung, S/B 4.0, 3200 mm Hub. Für die größten VLEC/VLGC. 7 Zylinder für hohes Leistungsniveau.

Calculated metrics

Stroke to bore ratio4

Inspector checklist

Laufzeug & Tribologie
  • Zylinderlaufbuchsen: 800 mm, S/B 4.0 — signifikante Seitenkräfte, Gas-Kaltverschleiß
  • Kolbenringe: Gas-Schmierungsbedingungen bei großer Bohrung
  • Zylinderschmierung: BN-Anpassung, Quill-Durchfluss bei 800 mm
Gaseinspritz-System
  • Gas-Einspritzventile: Bei 800 mm große Ventile — Dichtheit kritisch
  • FGSS: Kompressor, Sicherheitsventile
  • Gas-Detektoren
Elektronische Steuerung
  • ME-Steuerung: FIVA, HPS/HCU, EICU
  • Gas/Diesel-Umschaltung
  • Sicherheitslogik
Kreuzkopf & Stopfbuchse
  • Kreuzkopflager: 3200 mm Hub — hohe Trägheitskräfte
  • Stopfbuchse: Drainage
  • Kolbenstange: Deflection
Spülluft & Abgassystem
  • Spülluftkasten: Bei 800 mm begehbar
  • Turbolader: 2 TC bei 7×80
  • Abgas-Economiser

Logbook reference values

ParameterExpectedDeviation means
Abgastemperatur nach Zylinder320–380 °C (Gas); 350–420 °C (Diesel)Spread >15 °C → Gas/Pilot prüfen
Gas-Einspritzdruck250–300 barAbweichung → Kompressor/Ventil
Pmax±2 barAbweichung → Steuerung
Kreuzkopflager-Temperatur55–65 °CAnstieg → untersuchen

Common Failure Modes

  • Gas-Einspritzventil-Leckage bei 800 mm

    Symptoms: Gas-Alarm, Druckabfall

    Causes: Große Ventile, Ethan-Exposition

    Preventive: Ventile bei Kolbenziehung inspizieren

  • Kaltverschleiß im Gasbetrieb

    Symptoms: Erhöhte Wear-Rate

    Causes: Niedrige Temperatur, BN zu hoch

    Preventive: BN25-Öl, Kühlwasser >65 °C

  • FGSS-Ausfall

    Symptoms: Diesel-Fallback

    Causes: Kompressor-Verschleiß

    Preventive: FGSS warten

Expert tips

  • 7×S80ME-GA10: Bei 800 mm Bohrung und Gasbetrieb — Kolbenziehung erfordert Werftaufenthalt, Gas-Einspritzventile dabei immer mit inspizieren
  • Im Gasbetrieb: Turbolader-Fouling ist deutlich geringer — Reinigungsintervalle können verlängert werden, aber bei Diesel-Fallback sofort wieder normal warten
  • 7 Zylinder bei 800 mm: Torsionsschwingungen bei bestimmten Drehzahlen — Schwingungsdämpfer kontrollieren

Related components

  • FGSS
  • Gas-Einspritzventile
  • Gas-Detektoren
  • Turbolader (2 TC)
  • Pilot-Fuel-System
  • Schwingungsdämpfer

Classification & regulatory

IMO Tier II/III. IGC Code. SOLAS. MARPOL — nahezu SOx-frei.

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

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