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7L42MC-C8

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

Technical data from manufacturer or class sources · not yet verified by a person
14,140 kWPower
7Cylinders
420 mmBore
1,360 mmStroke
136 rpmMCR RPM

The MAN 7L42MC-C8 is a low‑speed, 7‑cylinder, two‑stroke main propulsion engine delivering up to 14 140 kW at 136 rpm, distinguished by camshaft‑controlled fuel injection and exhaust valves with constant‑pressure turbocharging.

Inspection

Inspector Detail

Designation decoded

7 Zylinder, L=Long-Stroke, 42=420 mm, MC-C8. 420 mm Bohrung, 1.360 mm Hub.

Background

7L42MC-C8, 7-Zylinder Long-Stroke, 420 mm. Mechanisch. Für Handysize-Schiffe.

Calculated metrics

Stroke to bore ratio3.24

Inspector checklist

Laufzeug
  • 420 mm, S/B 3.24.
  • Kolbenringe.
  • Kreuzkopf.
Steuerung
  • Nockenwelle.
  • Einspritzpumpen.
  • Auslassventil.
Kraftstoff
  • Düsen.
  • VLSFO.
Turbolader
  • Turbolader (1 Stück).
Dichtungen
  • Stopfbuchse.
  • Auslassventil.

Logbook reference values

ParameterExpectedDeviation means
AbgastemperaturHerstellerangabe>15 °C → Problem

Common Failure Modes

  • Plunger-Verschleiß

    Symptoms: Leistung

    Causes: Cat-Fines

    Preventive: Filtration.

Expert tips

  • L-Typ 7 Zylinder: Höhere Drehzahl, guter Massenausgleich.

Related components

  • Nockenwelle
  • Einspritzpumpen
  • Turbolader

Classification & regulatory

IMO Tier I/II.

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

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