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MAN Energy Solutions
10K90MC-C8
The MAN 10K90MC-C8 is a low‑speed, two‑stroke marine diesel main engine delivering up to 94.5 MW at 76 rpm, known for its camshaft‑controlled fuel injection and long‑standing reliability.
94500.0 kW
Power
Engine Specifications
10
Cylinders
900 mm
Bore
2500 mm
Stroke
94,500 kW
MCR Power
76.0 rpm
MCR RPM
2-stroke
Stroke Type
Family: MAN B&W MC/MC-C
· Tier: Tier II
· Fuel: HFO, VLSFO, MDO
Inspector Detail
▸
Designation decoded
10 steht für 10 Zylinder, K für Short-Stroke (Kurzhub), 90 für 900 mm Bohrung, MC-C für MAN B&W MC-Compact-Baureihe, 8 für Mark 8.
Background
The K90MC-C8 with 10 cylinders is an extremely powerful large engine. 900 mm bore at S/B 2.78 in 10-cylinder configuration — designed for the largest ships. 10 cylinders are exceptional in 2-stroke engines of this size.
Calculated metrics
Stroke To Bore Ratio
2.778
Inspector checklist
Laufzeug & Tribologie
- Zylinderlaufbuchsen: 900 mm Bohrung — Verschleißmessung an 12+ Positionen pro Zylinder
- Piston rings: K-type — compare ring wear across all 10 cylinders
- Zylinderschmierung: 900 mm Bohrung — gleichmäßige Quill-Verteilung an 10 Zylindern
Kreuzkopf & Stopfbuchse
- Kreuzkopflager: 10 Lager — systematischer Temperatur-Vergleich
- Stopfbuchse: Drainage an 10 Zylindern
- Kolbenstange: Deflection an allen 10 Kröpfungen
Steuerung & Hydraulik
- Camshaft drive: Extreme length at 10 cylinders — chain elongation and guide rails
- Exhaust valves and fuel injection pumps on all 10 cylinders
- Timing-Gleichmäßigkeit über 10 Zylinder
Spülluft & Abgassystem
- Scavenge air box: Walk-in — inspect all 10 ports
- Turbocharger: 3 TC — inspect all
- Abgas-Economiser auf Rußbrand-Risiko
Strukturelle Integrität
- Foundation: Extremely long engine — torque and condition of all foundation bolts
- Chocking: Zustand über gesamte Motorlänge inspizieren
- Alignment: 10 Kröpfungen + 11 Hauptlager vollständig messen
Logbook reference values
| Parameter | Expected | Deviation means |
|---|---|---|
| Exhaust gas temperature per cylinder | 330–400 °C at MCR | Spread >15 °C → untersuchen |
| Spülluftdruck | 2.8–3.5 bar | Abfall → TC |
| Pmax | ±3 bar Zylindergleichgewicht | Abweichung → Timing |
| Kreuzkopflager-Temperatur | 55–65 °C | Anstieg → sofort untersuchen |
| Kühlwasser-Temperatur | 80–85 °C | Einzelzylinder-Abweichung prüfen |
Common Failure Modes
Foundation deflection at 10×900 mm
Symptoms: Deflection deviations, uneven main bearing wear, chocking detachment
Causes: Extremely long and heavy engine, Schiffskörper-Biegebeanspruchung, Thermische Verformung
Preventive: Deflection at every docking, inspect foundation for cracks, inspect chocking
Nockenwellen-Antrieb Überlastung
Symptoms: Timing-Drift, Kettenlängung, Geräusche
Causes: 10 Zylinder = längste Antriebskette, Dynamic load at K-type
Preventive: Chain case every 10,000 operating hours inspect
Ungleichmäßige Zylinderschmierung
Symptoms: Lokaler Trockenlauf, Fressspuren
Causes: Clogged quills at 900 mm, Pressure drop across the fuel-oil distribution line at 10 cylinders
Preventive: Test each quill, verify oil pressure uniformity across all 10 cylinders
Expert tips
- 💡 10×K90MC-C8: One of the physically largest and most powerful conventional marine engines — the logistics for a major overhaul require months of advance planning
- 💡 At 10 cylinders with 900 mm bore: The total mass of the engine creates local forces on the double bottom that vary with sea state — compare deflection measurements under different loading conditions
- 💡 Zylinderöl-Versorgung: Bei 10 Zylindern sicherstellen, dass die Verteilerleitung ausreichend dimensioniert ist — Druckabfall zum letzten Zylinder kann zu Unterschmierung führen
Related components
Turbolader (3 TC)
Foundation bolts and double bottom
Kurbelwellen-Hauptlager (11 Lager)
Crankshaft and main bearing
Schwingungsdämpfer
Hilfsbläser
Classification & regulatory
IMO Tier I compliant. For Tier II combustion optimization or EGR/SCR. EEDI. MARPOL Annex VI — scrubber or VLSFO.
Reference content for inspector orientation. Always verify against manufacturer's manual, latest service letters and class society requirements.
Other Cylinder Configurations 50
5L35MC-C8
5 cyl
· 6,450 kW
5L42MC-C8
5 cyl
· 10,100 kW
5L60MC-C8
5 cyl
· 21,000 kW
5L70MC-C8
5 cyl
· 31,150 kW
5L80MC-C8
5 cyl
· 42,000 kW
5S26MC-C8
5 cyl
· 3,700 kW
5S35MC-C8
5 cyl
· 7,650 kW
5S42MC-C8
5 cyl
· 12,950 kW
5S46MC-C8
5 cyl
· 15,500 kW
5S50MC-C8
5 cyl
· 18,650 kW
5S60MC-C8
5 cyl
· 28,250 kW
5S65MC-C8
5 cyl
· 35,000 kW
5S70MC-C8
5 cyl
· 40,400 kW
5S80MC-C8
5 cyl
· 51,000 kW
5S90MC-C8
5 cyl
· 64,350 kW
6K80MC-C8
6 cyl
· 43,500 kW
6K90MC-C6
6 cyl
· 30,780 kW
6K90MC-C8
6 cyl
· 56,700 kW
6K98MC-C8
6 cyl
· 85,020 kW
6L35MC-C8
6 cyl
· 7,740 kW
6L42MC-C8
6 cyl
· 12,120 kW
6L60MC-C8
6 cyl
· 25,200 kW
6L70MC-C8
6 cyl
· 37,380 kW
6L80MC-C8
6 cyl
· 50,400 kW
6S26MC-C8
6 cyl
· 4,440 kW
6S35MC-C8
6 cyl
· 9,180 kW
6S42MC-C8
6 cyl
· 15,540 kW
6S46MC-C8
6 cyl
· 18,600 kW
6S50MC-C8
6 cyl
· 22,380 kW
6S50MC-C8.2
6 cyl
· 9,960 kW
6S60MC-C8
6 cyl
· 33,900 kW
6S65MC-C8
6 cyl
· 42,000 kW
6S65MC-C8.2
6 cyl
· 16,440 kW
6S70MC-C8
6 cyl
· 48,480 kW
6S80MC-C8
6 cyl
· 61,200 kW
6S90MC-C8
6 cyl
· 77,220 kW
7K80MC-C6
7 cyl
· 28,980 kW
7K80MC-C8
7 cyl
· 50,750 kW
7K90MC-C8
7 cyl
· 66,150 kW
7K98MC-C7.1
7 cyl
· 40,040 kW
7K98MC-C8
7 cyl
· 99,190 kW
7L35MC-C8
7 cyl
· 9,030 kW
7L42MC-C8
7 cyl
· 14,140 kW
7L60MC-C8
7 cyl
· 29,400 kW
7L70MC-C8
7 cyl
· 43,610 kW
7L80MC-C8
7 cyl
· 58,800 kW
7S35MC-C8
7 cyl
· 10,710 kW
7S42MC-C8
7 cyl
· 18,130 kW
7S46MC-C8
7 cyl
· 21,700 kW
7S50MC-C8
7 cyl
· 26,110 kW
Components & Design
Component data being added…
Technical Data
unified from engine model
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Maritime Network →Manuals
-
operating
MAN B&W MC/MC-C Engine Operating Manual (OM-MC-C)MAN Energy Solutions
-
maintenance
MAN B&W MC/MC-C Maintenance Manual (MM-MC-C)MAN Energy Solutions
-
spare_parts
MAN B&W MC/MC-C Illustrated Parts Catalogue (IPC-MC-C)MAN Energy Solutions
-
project_guide
MAN B&W Project Guide MC/MC-C (PG-MC-C)MAN Energy Solutions
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Equipment Model #38270
· ✓ still in production