MAN Marine
Spare Parts Supplier
MAN B&W · MaK · 2-stroke · 4-stroke
MAN engine models covered
Spare parts supply across the full MAN marine engine programme — from large-bore two-stroke main engines to medium-speed generator sets and high-speed auxiliary units.
MAN Energy Solutions has been named Everllence since 4 June 2025, and the two-stroke programme is branded Everllence B&W today. Nameplates on engines already in service still read MAN B&W, so both names are used on this page — send whichever is stamped on your unit.
Reading a two-stroke designation such as 6S50MC-C: the first figure is the number of cylinders, the letter that follows is the stroke-to-bore class — S super-long stroke, L long stroke, K short stroke — and the number after it is the bore in centimetres. So L50MC and S50MC share a 50 cm bore but differ in stroke, and their wear parts are not interchangeable on that basis alone. The Mark number and build are what settle a part number.
S50MC / S60MC
S50MC and S60MC RFQs can include pistons, liners, exhaust valves, fuel injection pumps and crosshead bearings. Confirm the complete designation, Mark and build evidence. Review the dedicated MAN B&W S50MC spare parts route.
S35MC / L35MC
35 cm bore engines in super-long-stroke and long-stroke form. Piston crowns and rings, cylinder liners, exhaust valve spindles and seats, fuel valves and injection pump elements, bearing shells and complete overhaul gasket sets.
L42MC / L50MC
Long-stroke units at 42 and 50 cm bore. Liners, piston rod stuffing box parts, exhaust valve components, fuel pump plungers and barrels, crosshead and main bearing shells, and cylinder cover studs.
L60MC / L70MC
Larger long-stroke units at 60 and 70 cm bore. Complete cylinder cover assemblies, exhaust valve housings and spindles, piston assemblies, turbocharger interface parts, and bearing sets for planned overhauls.
S70MC / S80MC
Large-bore slow-speed main engines. Cylinder liners, piston rings, stuffing box seals, turbocharger nozzle rings, camshaft drives.
G80ME-C / S90ME-C
Electronically controlled 2-stroke engines. HCU components, exhaust valve actuators, Alpha lubricators, cylinder liner kits.
L28/32 · L23/30
Medium-speed auxiliary engines. Cylinder heads, connecting rod bearings, injection nozzles, turbocharger cartridges, gasket sets.
L16/24
Compact auxiliary diesel. Piston rings, cylinder liners, fuel injection pumps, intercooler elements, crankshaft bearing shells.
L27/38 · V28/32S
In-line and V-form medium-speed engines for genset and propulsion duty. Cylinder liner sets, fuel injection equipment, valve-drive components, cooling circuit overhaul kits.
M20 · M25 · M32 · M43
MaK in-line and V-type diesels. Cylinder heads, valve seat inserts, injection equipment, governor parts, cooling system spares.
D2866 · D2876
High-speed marine diesels for fast craft and service vessels. Pistons, liners, injectors, turbocharger units, water pump assemblies.
What a MAN B&W marine engine looks like in service
Reference photography of a MAN B&W two-stroke main engine — useful for confirming engine family before an RFQ is submitted.
Representative licensed photography, not a Vessel Core installed reference or completed job. Engine photo: Eduard47, Wikimedia Commons, CC BY-SA 4.0. Vessel Core has no dealership, distribution or partnership agreement with Everllence, formerly MAN Energy Solutions; it operates as an independent spare parts supplier.
What a MAN designation says before a part number does
MAN type designations are read rather than looked up. On the two-stroke side a string like 6S50MC-C8 runs left to right: the 6 is the cylinder count; the letter after it is the stroke class, running K, L, S and G from the shortest stroke to the ultra-long-stroke green type; the 50 is the bore in centimetres; MC marks a camshaft-controlled engine and ME an electronically controlled one; a trailing C means the compact frame. Fuel suffixes come last — GI for gas injection, LGIM for methanol, LGIP for LPG — and the Mark number after that pins the revision. An enquiry that says S50MC has given the family. One that says 6S50MC-C8 has given the engine.
The four-stroke side reads differently, and the two are easy to mix up. There the designation carries two numbers instead of one: in L32/40 the 32 is the bore and the 40 the stroke, both in centimetres, and the leading letter is the cylinder arrangement — L in line, V in a vee. The Holeby generating-set programme follows the same rule, which is what L16/24, L21/31, L23/30 and L27/38 are saying. So one number behind a stroke letter means a two-stroke; a pair of numbers separated by a slash means a four-stroke. Reading that the wrong way round sends an enquiry to the wrong catalogue before anyone has looked at a part.
The B&W in the two-stroke name is older than any of it. MAN acquired Burmeister & Wain, the Copenhagen shipyard and engine builder, in 1980, and the joint name has outlived every corporate change since — including the 2018 move from MAN Diesel & Turbo to MAN Energy Solutions and the 2025 rename to Everllence, under which the two-stroke programme is branded Everllence B&W. A plate cast decades ago remains the plate to send; the brand above it has changed more often than the engine below it.
MAN marine spare parts supply scope
Planned overhaul components, running spares, and time-critical spare parts — structured by system and component group for MAN B&W, MaK, and MAN D-series engines.
- Cylinder heads & head gaskets
- Cylinder liners & liner O-rings
- Piston crowns, skirts & piston rings
- Exhaust valves, seats & spindles
- Fuel injection pumps & plungers
- Fuel injector nozzles & holders
- Turbocharger cartridges & nozzle rings
- Main bearings & crankpin shells
- Crosshead bearings & pins
- Camshaft bearings & timing drives
- Stuffing box seals & piston rod packings
- Connecting rod bolts & assemblies
- Governors & speed control parts
- Overhaul gasket kits & seal sets
The builder is named on the plate too, and it matters
MAN stopped building two-stroke engines at scale in the 1980s and has licensed the design ever since. The engines in service were built by the licensee network: Hyundai, Doosan and STX in Korea; Mitsui — licensed since 1926 and the oldest of them — Hitachi and Kawasaki in Japan; and a large Chinese group including CSSC-MES Diesel, Dalian, Yichang and Hudong. A plate therefore carries two identities. The MAN B&W type is the design. The builder name and works number beside it are what a licensee parts route is keyed to. One of the two narrows a line to a family; both together narrow it to an engine.
- Full type designation as stamped, with the cylinder count, the C where present and the Mark number
- Builder named on the plate — a Korean, Japanese or Chinese licensee, or MAN itself on an older or four-stroke unit
- The builder’s own engine or works number, which is what a licensee route is keyed to
- Year of build, and any conversion or upgrade recorded against the engine since
- MC or ME stated explicitly, since camshaft and electronic actuation share almost nothing on the fuel and exhaust side
- On a four-stroke, the complete designation with the arrangement letter — L27/38, not 27/38
- Duty: main propulsion or generating set, and for a genset the alternator make where the line touches the coupling
- Cylinder number the component came off, for any running-gear line
- Part number and the part-book page it came from, treated as a starting point rather than a conclusion
- Bearing shells with the undersize stated, and ring sets quoted per cylinder rather than per ring
- Exhaust valve written as a spindle, a seat, a housing or a complete cage — one word, four different orders
- Piston written as a crown, a skirt, a rod or a complete assembly, since on a crosshead engine those are separate items
- Turbocharger make and designation from its own plate, since it is a separate maker with a separate catalogue
- Running hours since the last overhaul, and any earlier reconditioning of the item itself
- Photographs of the engine plate, of the builder plate where it is separate, and of the component in place
Competitive alternative to MAN PrimeServ.
OEM-route and verified alternative routes are reviewed side by side so buyers can choose the route that fits approval needs, documentation, lead time and budget logic.
Cost-Aware Supply Options
Verified alternative routes for MAN B&W and MaK engines are reviewed when approval requirements, lead time and budget logic make them suitable.
OEM or Alternative — Your Choice
For class-surveyed overhauls or warranty-sensitive repairs, OEM-route components can be reviewed when documentation and approval requirements justify that route. For running spares and planned maintenance, verified alternative routes can also be reviewed.
Lead Time Confirmed at RFQ Stage
Lead time, availability and freight options are confirmed at RFQ stage based on part specification, approval requirements, vessel ETA and destination port.
Technical Part Identification
Missing part numbers or incomplete spares lists are not a barrier. We identify correct MAN components from engine type designation, bore, stroke, build year, and component photographs or drawings.
Port-Aware Delivery Planning
Supply route, handover option and freight timing are reviewed against confirmed RFQ details, vessel ETA, port context, documentation needs and part availability before quotation. No fixed delivery commitment is made before availability and route are confirmed.
Time-Critical Priority Review
Time-critical MAN B&W main engine failures receive priority RFQ review. Time-critical RFQs are checked against supplier availability, freight options, vessel timing and port timing.
MAN parts — common questions
Can Vessel Core review OEM-route and verified alternative routes for MAN B&W engines?
Yes. Vessel Core handles MAN B&W RFQs through OEM routes and verified alternative supply paths. Alternative options are reviewed case by case according to approval needs, lead time and budget logic.
What MAN engine models do you cover?
RFQs may reference MAN B&W S50MC, S60MC, S70MC, S80MC or G80ME-C families, L28/32, L23/30 or L16/24 auxiliaries and other identified MAN configurations. Review begins from the complete engine designation, serial/build and part evidence.
How quickly can MAN spare parts be delivered?
Lead time and freight options are confirmed at RFQ stage based on part availability, vessel ETA, destination port and urgency level.
Can Vessel Core supply MAN parts if I only have the engine model plate details?
If an exact part number is unavailable, the complete engine designation, serial/build, component description, model-plate photo and drawing or part-book evidence can start identification review. No component is confirmed from the family name alone.
Submit your RFQ now.
Send your MAN spare parts request — vessel name, engine model (e.g. MAN B&W S60MC-C), part numbers or descriptions, and port/ETA. Vessel Core reviews the supply route and prepares a structured supply quotation.
