"> MAN Energy Solutions 7S40ME-C9.6
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MAN Energy Solutions

7S40ME-C9.6

The MAN Energy Solutions 7S40ME-C9.6 is a low‑speed, 2‑stroke marine diesel main engine delivering up to 10 990 kW at 146 rpm, featuring hydraulic camshaft replacement and advanced electronic control for high efficiency and Tier III emissions compliance.

MAN Energy Solutions 7S40ME-C9.6
10990.0 kW
Power

Engine Specifications

7
Cylinders
400 mm
Bore
1600 mm
Stroke
10,990 kW
MCR Power
146.0 rpm
MCR RPM
2-stroke
Stroke Type
Family: MAN Energy Solutions ME/ME-C · Tier: Tier III · Fuel: HFO, VLSFO, MDO

Inspector Detail

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Designation decoded

7 = number of cylinders, S = Super-Long-Stroke, 40 = bore 400 mm, ME = electronically controlled, C = Compact, 9.6 = Engine Mark.

Background

The 7S40ME-C with 1600 mm stroke (ratio 4.0) and 7 cylinders is the Super-Long-Stroke variant of the 40er class. Highest speed at the smallest bore. 7 cylinders for excellent mass balance.

Calculated metrics

Stroke To Bore Ratio
4.0

Inspector checklist

Fuel system
  • Injectors: Cat Fines, 7 units
  • Fuel system
  • ME timing
Running gear & tribology
  • Ratio 4.0: moderate side forces
  • Liners: wear
  • Cylinder oil: BN
Control & hydraulics
  • 7 HCUs: 200-300 bar
  • EICU
  • Hydraulic oil
Exhaust system
  • TC (1x)
  • Exhaust boiler
  • Scavenge air receiver
Seals
  • 7 stuffing boxes
  • Exhaust valves
  • Scavenge air flaps

Logbook reference values

Parameter Expected Deviation means
Exhaust gas temperature per cylinder 355-425 °C >25 °C → check injection
P-max ±5 bar Timing
Scavenge air pressure 1.8-2.8 bar TC
Cylinder oil feed rate 0.8-1.2 g/kWh Fuel-dependent
Hydraulic oil pressure 200-300 bar HCU

Common Failure Modes

Cat Fine damage
Symptoms: Wear
Causes: Cat Fines
Preventive: Separator; fuel analysis
Cold corrosion
Symptoms: Liner wear
Causes: BN low
Preventive: Adjust BN
Cylinder balance, 7 cyl
Symptoms: Temperature spread
Causes: Uneven wear
Preventive: Performance monitoring

Expert tips

  • 💡 7S40 with ratio 4.0: most compact 7-cylinder configuration. Excellent mass balance at the highest speed in the 40er class.
  • 💡 7-cylinder S40: ideal configuration for small ships requiring smooth running and limited space.
  • 💡 On small engines with 7 cylinders: fuel quality affects all 7 simultaneously.

Related components

Turbocharger (1x) Separator Alpha Lubricator Fuel system Charge air cooler

Classification & regulatory

IMO Tier II. Tier III in ECA. MARPOL Annex VI.

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

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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
    MAN CEAS Engine Calculation Tool (CEAS)
    MAN Energy Solutions
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Equipment Model #38483 · ✓ still in production