"> MAN Energy Solutions 6G70ME-C9.5
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MAN Energy Solutions

6G70ME-C9.5

The MAN 6G70ME-C9.5 is a six‑cylinder, low‑speed 2‑stroke main propulsion engine delivering up to 20 520 kW at 91 rpm, featuring hydraulic camless valve actuation and electronic control for high efficiency.

20520.0 kW
Power
680,000 kg
Weight

Engine Specifications

6
Cylinders
700 mm
Bore
3256 mm
Stroke
20,520 kW
MCR Power
91.0 rpm
MCR RPM
21.0 bar
MEP
160.0 g/kWh
SFC
2-stroke
Stroke Type
Family: MAN Energy Solutions ME/ME-C · Tier: IMO Tier II · Fuel: HFO, VLSFO, MDO

Inspector Detail

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Designation decoded

6 = number of cylinders, G = Green Ultra Long Stroke, 70 = bore 700 mm, ME-C = MAN Electronically controlled Mark C, 9.5 = Mark 9.5 control generation.

Background

The 6G70ME-C9.5 is a Mark 9.5 version of the powerful G70 platform. Mark 9.5 is the direct predecessor of 9.6 — almost identical technology with minimal software/hardware differences. MEP 21.0 bar shows high power density. For large containerships and VLCCs.

Calculated metrics

Stroke To Bore Ratio
4.65
Mean Effective Pressure Bar
21.0

Inspector checklist

Fuel system
  • Fuel pumps: spray pattern for 700mm combustion chamber
  • Cat Fines: <15 ppm, high damage potential at 700mm
  • VLSFO
Running gear and tribology
  • 700mm liners: higher load at MEP 21 bar, wear, BN
  • Piston rings: thermal distortion at 700mm
  • Crosshead: S/B=4.65, 3256mm stroke, extreme side forces, LI critical
  • Stuffing box: long stroke, drainage
ME control system
  • HPS 300 bar: high flow rates
  • FIVA Mark 9.5
  • CCU: software differences to 9.6 minimal
Turbocharger
  • Large unit
  • Cleaning
  • Scavenge air pressure high at 21 bar MEP

Logbook reference values

Parameter Expected Deviation means
Exhaust gas temperature 330-430 °C (higher due to MEP 21) >25 °C spread
Scavenge air pressure 2.5-3.8 bar TC
Cylinder oil consumption 0.8-1.3 g/kWh BN, feed rate
Pmax High due to MEP 21 Timing
OMD <2.5% LEL Stuffing box

Common Failure Modes

Cat Fine damage
Symptoms: Wear at 700mm
Causes: Separator
Preventive: <15 ppm.
Crosshead bearing damage
Symptoms: Knocking, LI, temperature
Causes: S/B=4.65, 3256mm stroke, high MEP
Preventive: LI every 8000 running hours.
Liner crack at high MEP
Symptoms: Cooling water leakage, compression loss
Causes: Thermal fatigue at 21 bar MEP, Missing liner inspection
Preventive: Measure liner wall thickness every 24000 running hours, check cooling water for oil contamination.

Expert tips

  • 💡 Mark 9.5 vs. 9.6: minimal differences, but MAN software updates can bring efficiency improvements — check if an update is available.
  • 💡 MEP 21 bar: engine runs at the upper end of its capability — thermal load on the liner is higher than at standard MEP.
  • 💡 G70 with 6 cylinders and 3256mm stroke: crosshead inspection is priority no. 1.

Related components

Turbocharger (large unit) Scavenge air cooler Separators Alpha Lubricator (6) HPS

Classification & regulatory

IMO Tier II. ECA: VLSFO/scrubber.

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-C9.6
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
7G95ME-C9.6
7 cyl · 88,900 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 #38471 · ✓ still in production