8S80ME-GA10
The MAN 8S80ME-GA10 is an eight‑cylinder, low‑speed two‑stroke marine diesel engine delivering up to 81.6 MW at 78 rpm, notable for its dual‑fuel capability (HFO/VLSFO/MDO and ethane/LNG) and Tier III NOx compliance.
Engine Specifications
Inspector Detail
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Designation decoded
8 stands for 8 cylinders, S for Super-Long-Stroke, 80 for 800 mm bore, ME-GA for ethane-capable gas injection, 10 for Mark 10.
Background
The S80ME-GA10 with 8 cylinders is one of the largest ME-GA engines. 800 mm bore, S/B 4.0, 3200 mm stroke. For the very largest VLEC/VLGC. 8 cylinders for maximum power and stability.
Calculated metrics
Inspector checklist
- Cylinder liners: 800 mm, S/B 4.0 — side forces, gas cold corrosion wear
- Piston rings: Gas conditions at a large bore
- Cylinder lubrication: BN adjustment, quills at 800 mm
- Gas injection valves: Large valves at 800 mm — tightness
- FGSS
- Gas detectors
- ME control
- Gas/diesel changeover
- Safety logic
- Crosshead bearing: 3200 mm stroke — inertia forces
- Stuffing box: Drainage
- Piston rod: Deflection at 8 crank throws
- Scavenge air box: Walkable at 800 mm — all 8 ports
- Turbocharger: 2 TC
- Exhaust gas economizer
Logbook reference values
| Parameter | Expected | Deviation means |
|---|---|---|
| Exhaust temperature by cylinder | 320–380 °C (gas); 350–420 °C (diesel) | Spread >15 °C → check gas/pilot |
| Gas injection pressure | 250–300 bar | Deviation → compressor/valve |
| Pmax | ±2 bar | Deviation → control system |
| Crosshead bearing temperature | 55–65 °C | Rise → investigate |
Common Failure Modes
Expert tips
- 💡 8×S80ME-GA10: Piston withdrawal requires a yard stay — always inspect gas injection valves at 800 mm
- 💡 In gas operation: Turbocharger fouling significantly lower — adjust cleaning intervals, but standard intervals immediately in diesel operation
- 💡 8 cylinders at 800 mm: Stable configuration, gas/diesel changeover trouble-free
Related components
Classification & regulatory
IMO Tier II/III. IGC Code. SOLAS. MARPOL — nearly SOx-free.
Reference content for inspector orientation. Always verify against manufacturer's manual, latest service letters and class society requirements.
Other Cylinder Configurations 15
Components & Design
Component data being added…
Technical Data
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