14K98MC-C8
The MAN Energy Solutions 14K98MC‑C8 is a 14‑cylinder low‑speed two‑stroke diesel main engine delivering up to 198 MW (≈268 000 hp) at 97 rpm, with camshaft‑controlled fuel injection, constant‑pressure turbocharging and Variable Injection Timing as standard.
Engine Specifications
Inspector Detail
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Designation decoded
14 stands for 14 cylinders, K for Short-Stroke, 98 for 980 mm bore, MC-C for the MAN B&W MC-Compact series, 8 for Mark 8.
Background
The K98MC-C8 with 14 cylinders would be the absolute most powerful conventional marine engine in the world. A 980 mm bore with an S/B of 2.45 in a 14-cylinder configuration is a theoretical maximum configuration. In practice, the very largest container ships are fitted with 12-cylinder versions or the electronically controlled ME-C variant.
Calculated metrics
Inspector checklist
- Cylinder liners: 980 mm — wear measurement at 12+ positions, compare across 14 cylinders in groups
- Piston rings: S/B 2.45 — ring flutter risk across all 14 cylinders
- Piston crown: NDT at every piston withdrawal
- Crosshead bearings: 14 bearings — monitor in groups
- Stuffing box: drainage on 14 cylinders
- Piston rod: deflection at all 14 throws
- Camshaft drive: most extreme configuration
- Exhaust valves and fuel injection pumps on all 14 cylinders
- Timing across 14 cylinders
- Scavenge air box: all 14 ports
- Turbocharger: 4-5 TC
- Exhaust gas economiser
- Foundation: most extreme configuration — 14×980 mm
- Alignment: 14 throws + 15 main bearings
- Double bottom, chocking, tie rods
Logbook reference values
| Parameter | Expected | Deviation means |
|---|---|---|
| Exhaust gas temperature per cylinder | 330-400 °C at MCR | spread >15 °C → investigate immediately |
| Scavenge air pressure | 3.0-3.8 bar | drop → TC |
| Pmax | ±3 bar cylinder balance | deviation → timing |
| Crosshead bearing temperature | 55-65 °C | rise >3 °C → immediate action |
| Piston cooling oil temperature differential | Δt 15-25 °C | deviation → cooling |
Common Failure Modes
Expert tips
- 💡 14×K98MC-C8 is an extreme configuration — whether it was ever built or exists only as a catalogue variant must be clarified engine by engine
- 💡 Ring flutter at S/B 2.45 and foundation alignment are the two dominant inspection topics
- 💡 Major overhaul: at least 10 weeks of yard time, spare parts pre-ordered 24+ months in advance — a project management team experienced in large-engine overhauls is mandatory
Related components
Classification & regulatory
IMO Tier I. EGR/SCR for Tier II. EEDI Phase 2/3. MARPOL Annex VI — scrubber. For newbuilds ME-C or dual-fuel.
Reference content for inspector orientation. Always verify against manufacturer's manual, latest service letters and class society requirements.
Other Cylinder Configurations 50
Components & Design
Component data being added…
Technical Data
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Suppliers & Spare Parts
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Maritime Network →Manuals
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operating
MAN B&W MC/MC-C Engine Operating Manual (OM-MC-C)MAN Energy Solutions
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maintenance
MAN B&W MC/MC-C Maintenance Manual (MM-MC-C)MAN Energy Solutions
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spare_parts
MAN B&W MC/MC-C Illustrated Parts Catalogue (IPC-MC-C)MAN Energy Solutions
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project_guide
MAN B&W Project Guide MC/MC-C (PG-MC-C)MAN Energy Solutions