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7S50MC-C8

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

Technical data from manufacturer or class sources · not yet verified by a person
26,110 kWPower
7Cylinders
500 mmBore
2,000 mmStroke
127 rpmMCR RPM

The MAN Energy Solutions 7S50MC-C8 is a low‑speed, 7‑cylinder two‑stroke marine diesel engine delivering up to 26 110 kW at 127 rpm, noted for its camshaft‑controlled fuel injection and proven reliability over four decades.

Inspection

Inspector Detail ✓ verified

Designation decoded

7 Zylinder, S=Super-Long-Stroke, 50=500 mm, MC-C8. 500 mm Bohrung, 2.000 mm Hub.

Background

7S50MC-C8, 7-Zylinder, 500 mm. Für Handymax-Bulker. Mechanisch.

Calculated metrics

Stroke to bore ratio4

Inspector checklist

Laufzeug
  • 500 mm, S/B 4.0.
  • Kolbenringe.
  • Kreuzkopf.
Steuerung
  • Nockenwelle.
  • Einspritzpumpen.
  • Auslassventil.
Kraftstoff
  • Cat-Fines.
  • VLSFO.
Turbolader
  • Turbolader (1 Stück).
Dichtungen
  • Stopfbuchse.
  • Auslassventil.

Logbook reference values

ParameterExpectedDeviation means
Abgastemperatur370-420 °C>20 °C → Timing

Common Failure Modes

  • Plunger-Verschleiß

    Symptoms: Leistung

    Causes: Cat-Fines

    Preventive: Filtration.

Expert tips

  • 7S50: 7 Zylinder bieten mehr Leistung als 6-Zylinder-Version bei gleichem Bauraum-Footprint.

Related components

  • Nockenwelle
  • Einspritzpumpen
  • Turbolader

Classification & regulatory

IMO Tier I/II. EEXI.

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

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Related models

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