8S70ME-GA10
The MAN 8S70ME-GA10 is an eight‑cylinder, low‑speed two‑stroke main engine delivering up to 64.6 MW at 91 rpm, designed for ultra‑large vessels and featuring dual‑fuel capability (HFO/VLSFO/MDO plus ethane/LNG).
Engine Specifications
Inspector Detail
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Designation decoded
8 stands for 8 cylinders, S for Super-Long-Stroke, 70 for 700 mm bore, ME-GA for ethane-capable gas injection, 10 for Mark 10.
Background
The S70ME-GA10 with 8 cylinders is a powerful dual-fuel engine for large VLEC/VLGC. S/B 4.0 at 700 mm. 8 cylinders for the best vibration behavior and high power.
Calculated metrics
Inspector checklist
- Cylinder liners: S/B 4.0 at 700 mm — side forces, gas cold corrosion wear
- Piston rings: Gas lubrication conditions
- Cylinder lubrication: BN adjustment, quill flow at 700 mm
- Gas injection valves: Tightness at all 8 cylinders
- FGSS
- Gas detectors
- ME control
- Gas/diesel changeover
- Safety logic
- Scavenge air box: Accessible at 700 mm — all 8 ports
- Turbocharger: 2 TC
- Exhaust temperature across 8 cylinders
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 |
Common Failure Modes
Expert tips
- 💡 8×S70ME-GA10: Quill checks at 700 mm especially important in gas operation — set gas-specific feed rate
- 💡 2 turbochargers on 8 cylinders — less fouling with gas, but resume TC cleaning immediately after diesel fallback
- 💡 8 cylinders: Stable vibration behavior, 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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