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MAN Energy Solutions
18V51/60DF
The MAN 18V51/60DF is an 18‑cylinder V‑type, four‑stroke marine diesel engine delivering up to 21 600 kW at 500 rpm, capable of running on LNG (dual‑fuel) or HFO with seamless fuel switching.
21600.0 kW
Power
Engine Specifications
18
Cylinders
510 mm
Bore
600 mm
Stroke
4-stroke
Stroke Type
Components & Design
Component data being added…
Technical Data
Swept Volume per Cylinder
122.6 dm³
Output per Cylinder (MCR)
1050 kW @ 500-514 rpm
Diesel Fuel Consumption (85% MCR)
176 g/kWh
Gas Mode Consumption (85% MCR)
7150 kJ/kWh
Dry Mass - 12V51/60DF (Propulsion)
189 t
Dry Mass - 18V51/60DF (Propulsion)
265 t
Engine Cycle
Four-Stroke
Emissions Compliance
IMO Tier II, IMO Tier III (Gas & Diesel+SCR modes)
Fuel Flexibility
Seamless switching between gas/liquid during operation
power kw
21600
rpm
500
fuel type
LNG/HFO (Dual-Fuel)
configuration
V
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Common failures & inspection points
Lubricating Oil System Contamination: Extended operation with activated contamination display can lead to lube oil supply problems; running-in filter must be re
Piston Temperature Management: Crown scuffing risk if operating conditions cause thermal expansion to reduce piston-liner clearance; typically from over-fueling
Gas Fuel System Integrity: Dual-fuel systems require strict maintenance of gas supply cleanliness and pressure relief systems; hydrocarbon sensor monitoring ess
Turbocharger Boost Management: Stock turbocharger limitations at low-speed regions can compromise fuel consumption and combustion mode performance in dual-fuel
Cross-Head Bearing Maintenance: While MAN V51/60DF features optimized marine-head design for reduced service downtime, proper oil film maintenance and periodic
Type-general inspection and maintenance points for this equipment category — not model-specific.
Suppliers & Spare Parts
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Equipment Model #123374
· ✓ still in production