"> MAN Energy Solutions 5G80ME-C9.6
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MAN Energy Solutions

5G80ME-C9.6

The MAN 5G80ME-C9.6 is a high‑power, low‑speed 2‑stroke marine diesel engine (44 500 kW @ 78 rpm) featuring camless hydraulic cylinder units and advanced electronic control for Tier III emission compliance.

MAN Energy Solutions 5G80ME-C9.6
44500.0 kW
Power

Engine Specifications

5
Cylinders
800 mm
Bore
3450 mm
Stroke
44,500 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

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Designation decoded

5 = number of cylinders, G = Green Ultra Long Stroke, 80 = 800 mm bore, ME-C = MAN Electronically controlled Mark C, 9.6 = Mark 9.6 control generation.

Background

The G80ME-C with an 800mm bore and 3450mm stroke (S/B=4.31) is designed for large ships. 5 cylinders at 800mm is extremely rare — normally VLCCs and large containerships have 6-8+ cylinders. This configuration could be for special applications with limited power requirements.

Calculated metrics

Stroke To Bore Ratio
4.31

Inspector checklist

Fuel System
  • Fuel pumps: spray pattern for the 800mm combustion chamber
  • Pre-heating: 12-15 cSt
  • Cat fines: <15 ppm
  • VLSFO
Running Gear and Tribology
  • 800mm liners: large diameter, wear, BN, piston ring management
  • Piston rings: extreme thermal distortion at 800mm
  • Crosshead: S/B=4.31, 3450mm stroke, high loading, LI reading
  • Stuffing box: long stroke, large piston rod
Structural Integrity
  • Engine block: 800mm bore, check foundation bolts
  • Crankshaft: deflection, 5 throws
  • Foundation
ME Control
  • HPS 300 bar: high flow rates
  • FIVA Mark 9.6
  • CCU

Logbook reference values

Parameter Expected Deviation means
Exhaust gas temperature 320-420°C >25°C spread
Scavenge air pressure 2.5-3.8 bar TC
Cylinder oil consumption 0.7-1.2 g/kWh BN
OMD <2.5% LEL Stuffing box
Deflection MAN tolerance Alignment

Common Failure Modes

Cat fine damage
Symptoms: Wear at 800mm — large damage potential
Causes: Separator, VLSFO
Preventive: <15 ppm, strict control.
Crosshead bearing damage
Symptoms: Knocking, LI, temperature
Causes: 3450mm stroke, Oil
Preventive: LI every 8000 op. hours.
Foundation bolts
Symptoms: Vibration
Causes: 5 cyl. unfavorable mass balance
Preventive: Ultrasonic testing at docking.

Expert tips

  • 💡 5 cylinders on a G80 is extremely rare — torsional vibration and barred speed range MUST be precisely documented.
  • 💡 With only 5 cylinders and an 800mm bore, the engine runs in a narrow optimal speed band — slow steaming can be problematic.
  • 💡 Pay particular attention to structural integrity: 800mm forces distributed over only 5 cylinders.

Related components

Turbocharger (large unit) Scavenge air cooler Separators Alpha Lubricator HPS Torsional damper Engine block structure

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
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
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 #38454 · ✓ still in production