^AASA — Mitsui-MAN B&W

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Description

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Did you know

Mitsui E&S has been manufacturing MAN B&W diesel engines since a technical partnership with Burmeister & Wain (now MAN Energy Solutions) began in 1926. The first Mitsui-MAN B&W diesel engine, a 6125M model with 950 BHP, was produced in 1928 and installed in the Mitsui-made ship 'Takamisan'.
The Mitsui-MAN B&W engine series represents Mitsui E&S's long-standing line of two-stroke main engines. With the establishment of Mitsui E&S DU in 2023, the company expanded its portfolio to include WinGD and MAN's four-stroke Pielstick engines, offering a broader range of propulsion solutions.
Mitsui-MAN B&W engines are chosen for their fuel efficiency, ease of maintenance, and adaptability to various operating conditions, including compliance with NOx emission regulations. Recent developments focus on dual-fuel capabilities for methanol, LNG, ammonia, and hydrogen to meet decarbonization goals.

Model	Cylinder Bore (mm)	Piston Stroke (mm)	Max Output (kW)	Fuel Type
Mitsui-MAN B&W 12S50ME-C8.5-GI	500	2200	21,240	LNG Dual Fuel
Mitsui-MAN B&W 7S65ME-C	650	2730	Not specified (80 million HP accumulated production engine)	Diesel
Mitsui-MAN B&W 6S50MC-C	500	Not specified	Not specified	Diesel

Sources: mhi.com; imarinenews.com; mes.co.jp; marinelink.com; mes.co.jp; mlit.go.jp; scribd.com; motorship.com; mes.co.jp; seapowerhellas.gr; zaidan.info; man-es.com; biofuels.co.jp; mes.co.jp

Competitive Models

Similar models from other manufacturers — apple to apple.

^AAAA G50ME-C

G50ME-C is a MAN B&W 2S model, coded ^AAAA. Typical service: primary propulsion at sea; shaft drive to propeller. Instal…

^AAAE G95ME-C

G95ME-C is a MAN B&W 2S model, coded ^AAAE. Typical service: primary propulsion at sea; shaft drive to propeller. Instal…

^AAAD G80ME-C

G80ME-C is a MAN B&W 2S model, coded ^AAAD. Typical service: primary propulsion at sea; shaft drive to propeller. Instal…

^AAEA 6EY26W

Yanmar 6EY26W — a 6-cylinder medium-speed four-stroke main engine with 260mm bore. Compact design for coastal tankers, f…

^AAAF S50ME-C

S50ME-C is a MAN B&W 2S model, coded ^AAAF. Typical service: primary propulsion at sea; shaft drive to propeller. Instal…

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

^A  A  S  A
 │  │  │  └── Model: Mitsui-MAN B&W
 │  │  └───── Make: Mitsui E&S MES
 │  └──────── Equipment: Main Engine
 └─────────── System: ME, Propulsion & Steering