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Library› Engine Room› Main Engines (2-Stroke)› Main Engine 2-Stroke› MAN Energy Solutions 7G70ME-GA10
MAN Energy Solutions

7G70ME-GA10

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

Technical data from manufacturer or class sources · not yet verified by a person
48,090 kWPower
7Cylinders
700 mmBore
3,256 mmStroke
91 rpmMCR RPM

The MAN 7G70ME-GA10 is a high‑power, low‑speed 2‑stroke marine diesel engine with dual‑fuel capability (HFO/VLSFO/MDO and ethane/LNG), delivering up to 48 MW at 91 rpm while meeting IMO Tier III emission limits.

Inspection

Inspector Detail ✓ verified

Designation decoded

7 steht für 7 Zylinder, G für Green Ultra-Long-Stroke, 70 für 700 mm Bohrung, ME-GA für Ethan-fähige Gaseinspritzung, 10 für Mark 10.

Background

Die G70ME-GA10 mit 7 Zylindern kombiniert Green-Ultra-Long-Stroke (S/B 4.65) mit Ethan-fähiger Gaseinspritzung. Maximale Effizienz für VLEC/VLGC. 3256 mm Hub bei 700 mm Bohrung.

Calculated metrics

Stroke to bore ratio4.651

Inspector checklist

Laufzeug & Tribologie
  • Zylinderlaufbuchsen: S/B 4.65 — extrem hohe Seitenkräfte PLUS Gas-Kaltverschleiß — doppelte Herausforderung
  • Kolbenringe: Maximaler Seitendruck bei Gas-Schmierungsbedingungen
  • Zylinderschmierung: BN-Anpassung bei S/B 4.65 und Gas besonders kritisch
Gaseinspritz-System
  • Gas-Einspritzventile: Dichtheit — bei G-Typ höhere thermische Belastung
  • FGSS: Kompressor, Verdampfer, Sicherheitsventile
  • Gas-Detektoren
Kreuzkopf & Stopfbuchse
  • Kreuzkopflager: 3256 mm Hub — maximale Kräfte
  • Stopfbuchse: S/B 4.65 — maximale Relativbewegung — auch im Gasbetrieb Drainage kontrollieren
  • Kolbenstange: Deflection
Elektronische Steuerung
  • ME-Steuerung: FIVA, HPS/HCU, EICU
  • Gas/Diesel-Umschaltung
  • Sicherheitslogik
Spülluft & Abgassystem
  • Spülluftkasten: Bei 700 mm zugänglich — trotz Gas Öleintrag durch Stopfbuchse bei G-Typ
  • Turbolader
  • Abgastemperatur

Logbook reference values

ParameterExpectedDeviation means
Abgastemperatur nach Zylinder320–380 °C (Gas); 340–410 °C (Diesel)Spread >15 °C → Gas/Pilot prüfen
Gas-Einspritzdruck250–300 barAbweichung → Kompressor/Ventil
Kreuzkopflager-Temperatur55–65 °CAnstieg → sofort untersuchen
Pmax±2 barAbweichung → Steuerung

Common Failure Modes

  • Beschleunigter Liner-Verschleiß bei S/B 4.65 im Gasbetrieb

    Symptoms: Hohe Wear-Rate

    Causes: Extrem hohe Seitenkräfte, Kein HFO-Aschefilm, BN zu hoch

    Preventive: BN25-Öl, Alpha-Lubricator kalibrieren

  • Gas-Einspritzventil-Leckage

    Symptoms: Gas-Alarm

    Causes: Verschleiß, Ethan-Exposition

    Preventive: Ventile inspizieren

  • Stopfbuchsen-Verschleiß bei G-Typ

    Symptoms: Steigende Drainage

    Causes: S/B 4.65 maximale Relativbewegung

    Preventive: Drainage alle 1000 Bh prüfen

Expert tips

  • G70ME-GA10 mit 7 Zylindern: Dreifache Herausforderung — S/B 4.65, Gasbetrieb, Torsionsschwingungen bei 7 Zylindern
  • Zylinderöl-Management bei G-Typ und Gas: BN25 mit präziser Feed-Rate — die elektronische Dosierung muss exakt kalibriert sein
  • Spülluftkasten trotz Gas inspizieren — G-Typ-Stopfbuchsen erzeugen Öleintrag unabhängig vom Kraftstoff

Related components

  • FGSS
  • Gas-Einspritzventile
  • Gas-Detektoren
  • Turbolader
  • Schwingungsdämpfer
  • Alpha-Lubricator

Classification & regulatory

IMO Tier II/III. IGC Code. SOLAS. MARPOL — maximale Emissionsreduktion.

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

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