MAN Marine
Spare Parts Supplier
MAN B&W · Holeby · 2-stroke · 4-stroke
MAN engine models covered
Vessel Core OÜ, an independent marine spare parts supplier in Tallinn, Estonia, quotes spare parts across the MAN marine engine programme — from large-bore two-stroke main engines to medium-speed generator sets and high-speed auxiliary units — and holds no agreement with MAN or Everllence.
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, or the electronically controlled MAN B&W S60ME-C spare parts route for the ME-C generation of the same bore.
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. The L23/30H execution has its own MAN L23/30H spare parts route.
L16/24 · L21/31
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 is often assumed to be a MAN family and is not. Caterpillar bought the Maschinenbau Kiel engine division from the Krupp group in 1997 and renamed it Caterpillar Motoren in 2000, so an M-series plate belongs on the Caterpillar page, where the identification detail for it sits. Enquiries are handled either way.
D2866 · D2876
High-speed marine diesels for workboats and service vessels, built by MAN Engines, the engine business of MAN Truck & Bus. That is a different company from Everllence, whose own high-speed engine is the 175D, so a D-series line is not quoted from the Everllence catalogue; the maker's current in-line six-cylinder workboat engine is the D2676. 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 follow — GI for gas injection, LGIM for methanol, LGIP for LPG, LGIA for ammonia — and on a Tier III engine a last suffix names the NOx technology, such as HPSCR or EcoEGR; the Mark number before them, with its dot number, pins the revision. An enquiry that says S50MC has given the family. One that says 6S50MC-C8 has given the engine. The bore in that string is the figure the indicated power calculator needs, together with the stroke from the engine documents, the speed and a pmi from an indicator diagram.
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 is written the same way, which is what L16/24, L21/31, L23/30 and L27/38 are saying — with the caveat that the figures name the type and are not a dimension to order a liner or piston against. 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 the engine business of Burmeister & Wain of Copenhagen in 1980, the shipyard side staying separate and failing in 1996, 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.
MC, ME-C and ME-B are three parts routes, not one engine
The designation above reads MC as camshaft control and ME as electronic control. For a spares list the split goes one step further: the letters after the bore say how much of the engine is electronic, and the ME-B keeps a camshaft for the exhaust valve.
Camshaft on the fuel and exhaust side
The generation the MC cards above belong to. Its parts list carries the camshaft, the injection pumps, the actuator pumps and the reversing gear.
Hydraulic units in place of the camshaft
On the ME-C the camshaft hardware is replaced by hydraulic cylinder units and a power supply unit. Each cylinder has its own unit, supporting the fuel oil pressure booster and the exhaust valve actuator. Reversing is done by re-timing injection, exhaust valve activation and the starting valves, so the reversing servomotors of older engines are absent.
Camshaft kept for the exhaust valve
A chain-driven camshaft stays for the exhaust valves, and one hydraulic cylinder unit serves a pair of cylinders, with no exhaust valve actuator on it. The maker states that the starting air distributor on the ME-B is the same item as on the MC-C.
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 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
The maker designs the B&W two-stroke and licenses its construction: its own engine programme states that the engine is supplied by the licensee, the engine maker. 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, with Makita building under a Mitsui sub-licence and Hanshin under a Kawasaki one; and a large Chinese group including CSSC-MES Diesel, Dalian, Yichang and Hudong. Several of those builders have since been renamed — Doosan Engine traded as HSD Engine before becoming Hanwha Engine in 2024; the STX Heavy Industries works joined the HD Hyundai group the same year as HD Hyundai Marine Engine; Hitachi Zosen's engine business trades as Kanadevia; and Hyundai trades as HD Hyundai, a name two separate works now share — while the plates in service still carry the older names, so send the name as it is stamped rather than the name the company uses today. 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, the Mark number with its dot number, and any fuel or Tier III suffix such as -GI or -HPSCR
- Builder named on the plate — on a two-stroke a licensee in Korea, Japan or China; on a four-stroke MAN itself or one of its four-stroke licensees, such as Hanwha Engine, STX Engine or Kawasaki
- 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 and any Mk — L23/30H Mk 2, not 23/30
- 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 make 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
The turbocharger has a plate of its own
On an engine of any real size the turbocharger is a separate assembly with its own type designation, serial number and parts list. The engine plate names the engine, not the turbocharger fitted to it, and a line built from the engine type alone risks the wrong frame size entirely.
The turbocharger need not be a MAN unit at all. For the S60ME-C, the maker’s engine description states that these engines can be fitted with Everllence, Accelleron or MHI turbochargers, so the make is read off the turbocharger before a catalogue is chosen. Where the plate is a MAN one, the programmes seen in enquiries are the axial NA and TCA and the radial NR and TCR, with the axial TCT, the latest generation, on newer engines; the internal parts follow the flow arrangement, not just the generation.
Two more facts belong on the line. One is scope: a cartridge exchange and a loose-component order draw from the same parts list but are quoted differently. The other is VTA, the maker's variable turbine area, offered for TCA and TCR units and as a retrofit; it changes the turbine end, so state whether it is fitted before a nozzle ring, rotor or cartridge is quoted. The MAN turbocharger route takes each series in turn.
OEM-route and verified alternative review for MAN marine parts.
Vessel Core reviews an OEM route and a verified alternative against the evidence for the part, the buyer's approval requirements, the documentation available and the vessel's schedule. Availability and the supply route are confirmed only after the RFQ has been reviewed.
Cost-Aware Supply Options
Verified alternative routes for MAN B&W and MAN four-stroke 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, we review OEM-route components when documentation and approval requirements justify that route. For running spares and planned maintenance, we review verified alternative routes as well.
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. Identification review starts from the complete engine designation, serial/build, component photographs and drawing or part-book evidence; no component is confirmed from the family name alone.
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.
EU-registered company
Vessel Core OÜ is registered in Estonia (registry code 17028043, VAT EE102773714), with open company details, a named RFQ contact and a clear way for buyers to verify the company.
Which lines can be reviewed on a verified alternative, and which stay on the OEM route
The route is written beside each line, not decided for the whole engine. The decision rests on the item itself: whether it has measurable geometry and stated material, whether it carries control electronics, and whether a surveyor will look at it or a warranty covers it.
Measurable geometry, stated material
On a two-stroke overhaul: liners and O-rings, piston crowns and skirts, ring sets, stuffing box rings, crosshead, crankpin and main bearing shells, exhaust valve seats and housings, gaskets and seal kits. On an L23/30H generating set: liners and sealing rings, piston rings, valves and seat inserts, guides and rotators, bearing shells, gaskets, O-rings, filter elements and mounting elements. A verified alternative can be reviewed on these where your approval requirements permit, against dimensional records and material documentation supplied with the offer.
Control, precision hydraulics and survey scope
Anything carrying control electronics stays on the OEM route. On an ME-C engine the hydraulic assemblies — pressure boosters, exhaust valve actuators, control valves — are reviewed on an OEM route by default, and reconditioning the removed unit is often the sensible answer. On an L23/30H, cylinder heads, injection pumps and plunger elements, camshaft sections, turbocharger internals and the actuator go to an OEM-route review, and so does any scope a surveyor will look at.
The request states the route
State in the RFQ whether an OEM route is required, whether a verified alternative may be reviewed, and which technical, warranty, class and documentation approvals apply. An OEM-route review can be requested line by line rather than for the whole order. Vessel Core structures the route options but makes no blanket interchangeability decision; final technical acceptance stays with the buyer.
The OEM or verified alternative comparison sets out what evidence each route needs.
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.
When is a delivery date given for MAN spare parts?
We quote lead time line by line rather than order by order. On MAN B&W two-stroke work a cylinder cover or an exhaust valve cage rarely moves on the same clock as the ring sets and gaskets in the same request, so we put a date against each line only once a supplier has committed to it.
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.
Do you supply parts for electronically controlled MAN B&W ME-series engines?
An ME-series request can include mechanical parts that are identified unambiguously by a part number or a part-book page — cylinder kits, exhaust valves, fuel-system and turbocharger parts. HCU hydraulic units, Alpha lubricators and control-system components need exact evidence of the equipment actually installed and a line-by-line review of the supply route at RFQ stage.
My MAN B&W plate names Hyundai, Mitsui or another builder. Whose parts route applies?
Both names on the plate count. MAN has licensed its two-stroke design for decades, so the engines in service were built mostly by licensees in Korea, Japan and China: the MAN B&W type on the plate is the design, and beside it stand the builder's name and the builder's own works number. The type narrows a line to a family; a licensee parts route is keyed to the builder and the works number. Where the vessel has changed hands, the part book on board is often the licensee's rather than MAN's and may number an item differently, so send the page as photographed.
Is MaK part of the MAN engine programme?
No, although it is often taken for one. Caterpillar bought the Maschinenbau Kiel engine division from the Krupp group in 1997 and renamed it Caterpillar Motoren in 2000, so a MaK M-series plate, such as M20, M25, M32 or M43, belongs on the Caterpillar route, where the identification detail for it sits. The enquiry is handled either way; it is simply read against a different maker's documentation.
Is Vessel Core connected to MAN?
No, and there is no agreement of any kind. Vessel Core holds no dealership, distribution, representation or partnership agreement with MAN, and quoting a component against one of its designations implies no approval by the maker and no claim of interchangeability.
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.
