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Library› Engine Room› Main Engines (2-Stroke)› Main Engine 2-Stroke› MAN Energy Solutions 7S40ME-C9.6
MAN Energy Solutions

7S40ME-C9.6

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

Technical data from manufacturer or class sources · not yet verified by a person
10,990 kWPower
7Cylinders
400 mmBore
1,600 mmStroke
146 rpmMCR RPM

The MAN Energy Solutions 7S40ME-C9.6 is a low‑speed, 2‑stroke marine diesel main engine delivering up to 10 990 kW at 146 rpm, featuring hydraulic camshaft replacement and advanced electronic control for high efficiency and Tier III emissions compliance.

Inspection

Inspector Detail

Designation decoded

7 = Zylinderzahl, S = Super-Long-Stroke, 40 = Bohrung 400 mm, ME = elektronisch gesteuert, C = Compact, 9.6 = Engine Mark.

Background

Die 7S40ME-C mit 1600 mm Hub (Ratio 4.0) und 7 Zylindern ist die Super-Long-Stroke-Variante der 40er-Klasse. Höchste Drehzahl bei kleinster Bore. 7 Zylinder für excellenten Massenausgleich.

Calculated metrics

Stroke to bore ratio4

Inspector checklist

Brennstoffsystem
  • Injektoren: Cat-Fines, 7 Stück
  • Fuel-System
  • ME Timing
Laufzeug & Tribologie
  • Ratio 4.0: Moderate Seitenkräfte
  • Laufbuchsen: Verschleiß
  • Zylinderöl: BN
Steuerung & Hydraulik
  • 7 HCUs: 200-300 bar
  • EICU
  • Hydrauliköl
Abgassystem
  • TC (1x)
  • Abgaskessel
  • Spülluft-Receiver
Dichtungen
  • 7 Stopfbuchsen
  • Abgasventile
  • Spülluft-Klappen

Logbook reference values

ParameterExpectedDeviation means
Abgastemperatur nach Zylinder355-425 °C>25 °C → Einspritzung
P-max±5 barTiming
Spülluftdruck1.8-2.8 barTC
Zylinderöl-Feed-Rate0.8-1.2 g/kWhFuel-abhängig
Hydrauliköl-Druck200-300 barHCU

Common Failure Modes

  • Cat-Fine-Schäden

    Symptoms: Verschleiß

    Causes: Cat-Fines

    Preventive: Separator; Fuel-Analyse

  • Cold Corrosion

    Symptoms: Liner-Verschleiß

    Causes: BN niedrig

    Preventive: BN anpassen

  • Zylinderbalance 7 Zyl

    Symptoms: Temperatur-Spreizung

    Causes: Ungleicher Verschleiß

    Preventive: Performance-Monitoring

Expert tips

  • 7S40 mit Ratio 4.0: Kompakteste 7-Zylinder-Konfiguration. Exzellenter Massenausgleich bei höchster Drehzahl in der 40er-Klasse.
  • 7 Zylinder S40: Ideale Konfiguration für kleine Schiffe mit Anspruch an Laufruhe und geringem Platz.
  • Bei kleinen Motoren mit 7 Zylindern: Fuel-Qualität wirkt sich auf alle 7 gleichzeitig aus.

Related components

  • Turbolader (1x)
  • Separator
  • Alpha Lubricator
  • Fuel-System
  • Ladeluftkühler

Classification & regulatory

IMO Tier II. Tier III in ECA. MARPOL Annex VI.

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

Documentation

Manuals

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