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MAN Energy Solutions
7S80ME-C9.6
The MAN 7S80ME-C9.6 is a high‑power, low‑speed two‑stroke marine diesel engine (71 400 kW @ 78 rpm) featuring hydraulic camshaft replacement and advanced electronic control for superior fuel efficiency.
71400.0 kW
Power
Engine Specifications
7
Cylinders
800 mm
Bore
3200 mm
Stroke
71,400 kW
MCR Power
78.0 rpm
MCR RPM
2-stroke
Stroke Type
Family: MAN Energy Solutions ME/ME-C
· Tier: Tier III
· Fuel: HFO, VLSFO, MDO
Inspector Detail
✓ verified
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Designation decoded
7 = number of cylinders, S = Super-Long-Stroke, 80 = bore 800 mm, ME = electronically controlled, C = Compact, 9.6 = Engine Mark.
Background
The 7S80ME-C9.6 with 3200 mm stroke (ratio 4.0) and 7 cylinders is the Super-Long-Stroke variant of the 80er class. Higher speed than the G80 at the same bore. For large ships with a conventional propeller.
Calculated metrics
Stroke To Bore Ratio
4.0
Inspector checklist
Fuel system
- 7 injectors: 800 mm bore, Cat Fines
- Fuel system
- ME timing
Running gear & tribology
- Ratio 4.0 at 800 mm: high absolute forces
- Liners: wear
- Cylinder oil: BN
Control & hydraulics
- 7 large HCUs
- EICU 9.6
- Hydraulic oil
Exhaust system
- TC (2-3x)
- Exhaust boiler
- Scavenge air receiver
Foundation
- 7S80: large engine, deflection
- Torsional vibration damper
- Foundation bolts
Logbook reference values
| Parameter | Expected | Deviation means |
|---|---|---|
| Exhaust gas temperature per cylinder | 310-375 °C | >20 °C → check injection |
| P-max | ±5 bar | Timing |
| Scavenge air pressure | 2.8-3.8 bar | TC |
| Crankshaft deflection | per MAN S80 7-cyl | Alignment |
| Hydraulic oil pressure | 200-300 bar | HCU |
Common Failure Modes
Cat Fine damage
Symptoms: Liner wear
Causes: Cat Fines
Preventive: Separator
Torsional vibration on S80
Symptoms: Vibrations
Causes: Higher speed + 7 cyl
Preventive: Torsional vibration analysis; damper
Foundation
Symptoms: Deflection
Causes: Large engine
Preventive: Measure closely
Expert tips
- 💡 7S80 is more compact than 7G80 — but still a large engine >600 t. Foundation inspection remains mandatory.
- 💡 At S80 higher speed: check torsional vibration behaviour. A torsional vibration analysis must be available and valid.
- 💡 7 cylinders at 800 mm: good mass balance reduces external forces, but internal forces (guide shoes, bearings) remain high.
Related components
Turbocharger (2-3x)
Separator
Torsional vibration damper
Foundation
Guide shoes
Classification & regulatory
IMO Tier II/III. MARPOL Annex VI. EEDI Phase 2/3.
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 #38497
· ✓ still in production