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MAN Energy Solutions
8S95ME-C9.6
The MAN 8S95ME-C9.6 is an eight‑cylinder low‑speed two‑stroke diesel main engine delivering up to 113 MW at 80 rpm, featuring hydraulic camshaft technology and advanced electronic control for high efficiency and Tier III emissions compliance.
113600.0 kW
Power
Engine Specifications
8
Cylinders
950 mm
Bore
3460 mm
Stroke
113,600 kW
MCR Power
80.0 rpm
MCR RPM
2-stroke
Stroke Type
Family: MAN Energy Solutions ME/ME-C
· Tier: Tier III
· Fuel: HFO, VLSFO, MDO
Inspector Detail
▸
Designation decoded
8 = Number of cylinders (8 cylinders); S = Super-Long-Stroke (stroke-to-bore ratio exceeding 3.5); 95 = Cylinder bore in cm (950 mm); ME-C = Electronically controlled engine, Compact version (no camshaft, hydraulic fuel injection and exhaust valve control via ECS); 9.6 = Mark version 9.6 (development stage/upgrade level)
Background
The MAN 8S95ME-C9.6 is the largest two-stroke marine engine of the ME-C series with 950 mm bore and is used for VLCC and ULCC tankers as well as the largest container ships. As an electronically controlled engine without a camshaft, it represents MAN Energy Solutions' most modern control technology with full flexibility in injection timing and exhaust valve control. The Mark 9.6 version integrates the latest efficiency and emissions optimizations.
Calculated metrics
Stroke To Bore Ratio
3.642
Inspector checklist
Hydraulic Power Supply (HPS) and hydraulic system
- Systemdruck prüfen (Betriebsdruck ca. 300 bar)
- Check hydraulic oil condition and filtration grade (NAS/ISO class)
- Inspect HPS pumps for leakage, vibration and delivery rate
- Pressure accumulator precharge pressure and membrane/bladder condition
- Inspect all high-pressure lines for fatigue cracks and leakage
FIVA valves and Hydraulic Cylinder Unit (HCU)
- Check FIVA valve function and response times per cylinder
- Inspect HCU unit for external leakage and wear condition
- Test fuel booster and exhaust valve actuator for correct stroke movement
- Check HCU piston seals for wear and blow-by
Engine Control System (ECS) and EICU
- Check EICU modules (2 per cylinder) for fault messages and redundancy
- Sensor-Kalibrierung (Winkelgeber, Drucksensoren, Temperatursensoren) verifizieren
- Document ECS software version and compare with latest service letter
- Backup-Betriebsmodus (Einzelzylinder-Abschaltung) testen
Cylinder condition and piston system
- Laufbuchsen-Verschleißmessung (Bohrung 950 mm, Ovalisierung dokumentieren)
- Measure piston rings and piston ring grooves
- Inspect piston crown for cracks, burn marks and erosion
- Check scavenge ports for coking and deformation
Alpha-Lubricator and cylinder lubrication
- Alpha-Lubricator Dosiergenauigkeit pro Schmierpunkt prüfen
- Schmierölqualität (BN-Wert) an Betriebsbedingungen anpassen
- Verify lubrication point distribution and timing adjustment
- Feed rate in relation to engine load and fuel sulfur content
Exhaust valve and exhaust system
- Check exhaust valve stem and seat for corrosion and combustion deposits
- Ventildrehvorrichtung (Rotocap) Funktion prüfen
- Check valve guide for wear and oil carbon deposit
- Hydraulic outlet valve actuator tightness and damping
Logbook reference values
| Parameter | Expected | Deviation means |
|---|---|---|
| Hydrauliköldruck HPS | 280–320 bar | Pressure drop indicates pump wear, internal leakage or clogged filters |
| Pmax (Zünddruck) | Depending on load according to testbed protocol, spread between cylinders < 3 bar | Deviation indicates problems with injection timing, FIVA valve or compression |
| Pcomp (Kompressionsdruck) | Gemäß Shop-Test-Werte, Zylinderabweichung < 2 bar | Low value indicates piston ring wear, outlet valve leakage or liner wear |
| Exhaust gas temperature per cylinder | Gemäß Hersteller, Spreizung < 30°C zwischen Zylindern | Elevated temperature indicates poor combustion, injection problem or outlet valve leakage |
| Zylinderschmieröl-Feedrate | 0.6–1.2 g/kWh depending on sulfur content | Too low: increased liner wear; too high: oil carbon formation and costs |
| Hydrauliköl-Filtrationsgrad | NAS 7 or better (ISO 17/15/12) | Deterioration leads to FIVA valve malfunction and HCU wear |
| Kühlwassertemperatur Zylinderauslass | 75–85°C | Zu hoch: Durchbrenner, Dichtungsleck; zu niedrig: Kaltwasserkorrosion, Kondensation |
Common Failure Modes
FIVA-Ventil Fehlfunktion
Symptoms: Zylinder-Missfire, ungleichmäßiger Lauf, ECS-Alarme für betroffenen Zylinder, erhöhte Abgastemperatur-Spreizung
Causes: Hydrauliköl-Kontamination (Partikel, Wasser), Magnetventil-Spule defekt, Wear of valve spool due to insufficient filtration
Preventive: Hydrauliköl-Reinheit gemäß MAN-Vorgaben sicherstellen, Filter regelmäßig wechseln, FIVA-Ventile im Rahmen planmäßiger Überholung tauschen
HCU interne Leckage
Symptoms: Leistungsabfall am betroffenen Zylinder, erhöhter HPS-Pumpen-Laufzeit, Druckabfall im Hydrauliksystem
Causes: Piston seal wear in fuel booster or exhaust valve actuator, Ermüdung der Hochdruck-Dichtungen, Cavitation due to air entrapment in hydraulic system
Preventive: Regular overhaul of HCU according to operating hours interval, bleed hydraulic oil and monitor condition
Auslassventil-Undichtigkeit (Burnthrough)
Symptoms: Erhöhte Abgastemperatur, sichtbarer Blow-by am Ventilgehäuse, Leistungsverlust, hörbare Durchblasgeräusche
Causes: Corrosion of valve spindle and seat due to vanadium/sodium in fuel, Fehlende Ventilrotation (Rotocap defekt), Unzureichende Ventilführungs-Schmierung
Preventive: Grind valve seat regularly, check Rotocap function at each inspection, monitor fuel quality
Alpha-Lubricator Dosierungsfehler
Symptoms: Increased liner wear (insufficient oil) or oil carbon deposit on piston and scavenge ports (excess oil)
Causes: Verstopfte Schmierleitungen, Defekte Dosierkolben im Alpha-Lubricator, Falsche Software-Einstellung der Feed-Rate
Preventive: Regelmäßige Überprüfung der Dosiergenauigkeit pro Schmierpunkt, Leitungen spülen, Software-Parameter mit Betriebsprofil abgleichen
ECS/EICU Elektronikausfall
Symptoms: Zylinder-Cut-out, Umschaltung auf Backup-Modus, diverse Alarme im ECS
Causes: Vibrationsbedingter Kontaktfehler an Steckverbindungen, Feuchtigkeit/Korrosion in Elektronikgehäusen, Spannungsversorgungsprobleme
Preventive: Check and tighten connector plugs regularly, air-condition electronics compartments, maintain UPS system
Expert tips
- 💡 At 950 mm bore, clarify crane capacity and access possibilities in advance — individual components such as piston and outlet valve weigh over 8 tonnes and require docking time or special lifting equipment.
- 💡 Unlike MC/MC-C, there is NO chain drive and NO camshaft — all control runs electronically-hydraulically. Inspection focus is therefore on hydraulic system, FIVA valves and ECS instead of mechanical control components.
- 💡 Hydraulic oil cleanliness is the life insurance of the ME-C: have NAS class analysed regularly and document results in the oil logbook. If limit value is exceeded, immediately use bypass filtration.
Related components
Turbolader (ABB/MAN)
Ladeluftkühler
Crosshead bearing and guide
Main bearing and crankshaft
Pleuellager
Stopfbuchse (Stuffing Box)
Scavenge air port and scavenge ports
Brennstoffaufbereitung (Visco-Therm, Filter, Separator)
Starting air system and starting valves
Crankshaft system and thrust bearing
Classification & regulatory
Class surveys in accordance with IACS UR Z10.4 for electronically controlled engines must be observed. Special attention to ECS software documentation, hydraulic system certificates and cylinder wear trending. NOx Technical File (EIAPP certificate) and Tier II/III compliance to be verified. When switching to alternative fuels (LSFO, LNG-Ready), verify manufacturer approvals and class approval.
Reference content for inspector orientation. Always verify against manufacturer's manual, latest service letters and class society requirements.
Other Cylinder Configurations 50
5G40ME-C9.6
5 cyl
· 8,550 kW
5G45ME-C9.6
5 cyl
· 11,250 kW
5G50ME-C9.6
5 cyl
· 15,500 kW
5G60ME-C9.6
5 cyl
· 24,500 kW
5G65ME-C9.6
5 cyl
· 29,350 kW
5G70ME-C9.6
5 cyl
· 34,350 kW
5G80ME-C9.6
5 cyl
· 44,500 kW
5G90ME-C9.6
5 cyl
· 56,000 kW
5G95ME-C9.6
5 cyl
· 63,500 kW
5S40ME-C9.6
5 cyl
· 7,850 kW
5S46ME-C9.6
5 cyl
· 15,500 kW
5S50ME-C9.6
5 cyl
· 18,650 kW
5S60ME-C9.6
5 cyl
· 28,250 kW
5S65ME-C9.6
5 cyl
· 35,000 kW
5S70ME-C9.6
5 cyl
· 40,400 kW
5S80ME-C9.6
5 cyl
· 51,000 kW
5S90ME-C9.6
5 cyl
· 64,350 kW
5S95ME-C9.6
5 cyl
· 71,000 kW
6G40ME-C9.6
6 cyl
· 10,260 kW
6G45ME-C9.6
6 cyl
· 13,500 kW
6G50ME-C9.6
6 cyl
· 18,600 kW
6G60ME-C9.6
6 cyl
· 29,400 kW
6G65ME-C9.6
6 cyl
· 35,220 kW
6G70ME-C9.5
6 cyl
· 20,520 kW
6G70ME-C9.6
6 cyl
· 41,220 kW
6G80ME-C9.6
6 cyl
· 53,400 kW
6G90ME-C9.6
6 cyl
· 67,200 kW
6G95ME-C9.6
6 cyl
· 76,200 kW
6S40ME-C9.6
6 cyl
· 9,420 kW
6S46ME-C9.6
6 cyl
· 18,600 kW
6S50ME-C8.5
6 cyl
· 10,680 kW
6S50ME-C9.6
6 cyl
· 22,380 kW
6S60ME-C9.6
6 cyl
· 33,900 kW
6S65ME-C9.6
6 cyl
· 42,000 kW
6S70ME-C8.5
6 cyl
· 18,660 kW
6S70ME-C9.6
6 cyl
· 48,480 kW
6S80ME-C9.5
6 cyl
· 24,000 kW
6S80ME-C9.6
6 cyl
· 61,200 kW
6S90ME-C9.6
6 cyl
· 77,220 kW
6S95ME-C9.6
6 cyl
· 85,200 kW
7G40ME-C9.6
7 cyl
· 11,970 kW
7G45ME-C9.6
7 cyl
· 15,750 kW
7G50ME-C9.6
7 cyl
· 21,700 kW
7G60ME-C9.6
7 cyl
· 34,300 kW
7G65ME-C9.6
7 cyl
· 41,090 kW
7G70ME-C9.6
7 cyl
· 48,090 kW
7G80ME-C9.5
7 cyl
· 34,930 kW
7G80ME-C9.6
7 cyl
· 62,300 kW
7G90ME-C9.6
7 cyl
· 78,400 kW
7G95ME-C9.5
7 cyl
· 46,550 kW
Components & Design
Alpha Lubricator Control
MAN Energy Solutions
MAN Alpha Lubricator Mk III
Feed rate 0.6-1.2 g/kWh depending on fuel sulfur. Monitor via Alpha ACC (Adaptive Cylinder lubrication Control).
Lead time: 6 wk
25.0 kg
Crankcase Oil Mist Detector
Schaller Automation
Schaller Visatron VN215+ OMD
SOLAS mandatory. Test weekly. Clean sensor optics every 4,000 hrs. Replace reference cell every 2 years.
Lead time: 2 wk
8.0 kg
Crosshead Bearing
MAN Energy Solutions
MAN Crosshead Bearing (thin-shell, white metal)
Inspect at 16,000 hrs. Check bearing clearance. Monitor via bearing temperature and oil analysis.
Lead time: 12 wk
380.0 kg
Cylinder Liner
MAN Energy Solutions
MAN ME-C Cylinder Liner (bore-cooled)
Wear monitoring via calibration. Max wear 0.8% of bore. Replace typically at 32,000-60,000 hrs.
Lead time: 16 wk
3500.0 kg
Engine Control Unit (ECU / ECS)
MAN Energy Solutions
MAN ECS (Engine Control System)
Dual-redundant ECU. Software updates via MAN PrimeServ. Keep backup CCU on board.
Lead time: 8 wk
45.0 kg
Exhaust Valve (& Valve Seat)
MAN Energy Solutions
MAN Exhaust Valve (Nimonic/Stellite)
Overhaul at 8,000-12,000 hrs. Stellite-faced seat. Grinding/lapping at overhaul. Check spindle guide clearance.
Lead time: 8 wk
320.0 kg
FIVA Valve (ME-type)
MAN Energy Solutions
MAN FIVA Valve (ME-C)
FIVA = Fuel Injection Valve Actuator. Overhaul at 8,000 hrs. Critical for timing accuracy.
Lead time: 8 wk
35.0 kg
Fuel Booster Module (ME-type)
MAN Energy Solutions
MAN Fuel Booster Module
Overhaul at 16,000 hrs. Pressure test fuel pipes. Check plunger wear with micrometer.
Lead time: 12 wk
450.0 kg
Fuel Valve (Injector)
MAN Energy Solutions
MAN ME-C Fuel Valve Assembly
Overhaul every 4,000-8,000 hrs. Pressure test after overhaul. Nozzle replacement at 8,000 hrs.
Lead time: 4 wk
85.0 kg
Governor (Electronic/Woodward)
Woodward
Woodward 723PLUS Digital Governor
Electronic governor integrated with ECS on ME engines. Firmware updates via Woodward service.
Lead time: 4 wk
15.0 kg
Hydraulic Cylinder Unit (HCU)
MAN Energy Solutions
MAN HCU (ME-C type, per cylinder)
One HCU per cylinder. FIVA valve overhaul at 8,000 hrs. Booster overhaul at 16,000 hrs.
Lead time: 12 wk
1200.0 kg
Hydraulic Power Supply (HPS)
MAN Energy Solutions
MAN HPS Unit (ME-C)
Servo oil SAE 30 / System oil. Filter change every 4000 hrs. Monitor servo oil pressure.
Lead time: 16 wk
2800.0 kg
Main Bearings
MAN Energy Solutions
MAN Main Bearing Shells (white metal/tri-metal)
Inspect at 16,000 hrs. Jack up crankshaft for clearance measurement. Replace at signs of overlay fatigue.
Lead time: 8 wk
250.0 kg
PMI (Pressure Measurement Indicator)
MAN Energy Solutions
MAN PMI Sensor System
Online cylinder pressure monitoring. Calibrate sensors annually. Essential for combustion optimization.
Lead time: 4 wk
5.0 kg
Piston Crown
MAN Energy Solutions
MAN ME-C Piston Crown (bore-cooled Cr-Mo steel)
Inspect at 16,000 hrs. Pull piston at 16,000-24,000 hrs. Check cooling bores with borescope.
Lead time: 16 wk
1800.0 kg
Piston Ring Pack
MAN Energy Solutions
MAN Piston Ring Set (CPR / AL rings)
CPR (Controlled Pressure Relief) top ring. Replace at 8,000-16,000 hrs depending on wear.
Lead time: 4 wk
60.0 kg
Scavenge Air Cooler
MAN Energy Solutions
MAN Scavenge Air Cooler (plate-type)
Clean air side every 4,000-8,000 hrs (chemical/HP water). Monitor pressure drop and charge air temp.
Lead time: 16 wk
5500.0 kg
Turbocharger Unit (ABB/MHI/Napier)
ABB Turbocharging
ABB A175-L Turbocharger
Overhaul at 12,000-16,000 hrs. Water washing every 24-100 hrs depending on load.
Lead time: 12 wk
4500.0 kg
Technical Data
unified from engine model
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Maritime Network →Manuals
-
operating
MAN B&W ME/ME-C/ME-B Engine Operation (OM-ME-C)MAN Energy Solutions
-
maintenance
MAN B&W ME/ME-C Maintenance Manual (MM-ME-C)MAN Energy Solutions
-
spare_parts
MAN B&W ME/ME-C Illustrated Parts Catalogue (IPC-ME-C)MAN Energy Solutions
-
service_letter
SL-ME Service Letters Collection (SL-ME)MAN Energy Solutions
- technical_data
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Equipment Model #38521
· ✓ still in production