^BAMJ — L51/60DF

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Description

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Did you know

The MAN L51/60DF dual-fuel engine was introduced into MAN Energy Solutions' portfolio in 2009, with the first order for this engine type registered in 2007.
The L51/60DF is part of MAN Energy Solutions' medium-speed engine family, sitting alongside models like the L32/40 and L48/60, and is a predecessor to the newer 49/60DF series.
This model is chosen for its fuel flexibility, allowing operation on various fuels including natural gas, biogas, and heavy fuel oil, and its ability to switch between them seamlessly without power loss. It also offers high power output per cylinder and compliance with IMO Tier II and Tier III emission regulations.

Model	Bore × Stroke (mm)	Power/Cylinder (kW)	RPM (at MCR)	Fuel Type
L51/60DF	510 × 600	975-1000	500/514	Dual-fuel (Diesel/Gas)
L48/60 (earlier version)	480 × 600	885	500/514	Heavy Fuel Oil
L48/60B	480 × 600	1200	500/514	Heavy Fuel Oil
L32/40	320 × 400	500	720/750	Heavy Fuel Oil
49/60DF (successor)	490 × 600	1300	600	Dual-fuel (LNG/Diesel/HFO)

Sources: marinelog.com; offshore-energy.biz; marinelink.com; powerprogress.com; man-es.com; nauticexpo.com; facebook.com

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Spares

Positions 1–12 are the same part on every engine and are safe to quote by code. 13 and 14 vary with cylinder count.

1Cylinder Liner — page under construction
2Piston — page under construction
3Fuel Injector Nozzle — page under construction
4Cylinder Head / Cover — page under construction
5Connecting Rod — page under construction
6Main Bearing — page under construction
7Bottom-End (Crankpin / Con-Rod) Bearing — page under construction
8Fuel Injection Pump — page under construction
9Fuel Injector (Complete) — page under construction
10Exhaust Valve — page under construction
11Inlet Valve — page under construction
12Piston Ring Set — page under construction
13Crankshaft — page under construction
14Camshaft — page under construction

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Code map

^B  A  M  J
 │  │  │  └── Model: L51/60DF
 │  │  └───── Make: MAN Energy Solutions
 │  └──────── Equipment: Aux Engine
 └─────────── System: Aux Engine Power Generation