Yanmar Marine
Spare Parts Supplier
6EY · 6AYL · 6N · 6HAL Series
Yanmar engine models covered
Yanmar marine RFQs may reference EY, AYL, N, HAL or MAL model families. The cards below give short designations; the plate carries more. In Yanmar's current listings most of these families appear as generating-set builds such as 6EY18LW, 6EY18ALW, 6EY22ALW, 6AYL-WET, 6HAL2-WHT and 6N165LW, and as propulsion builds such as 6EY22AW and 6N21AW. Exact model, serial/build, installed duty and part evidence are checked before a route is confirmed.
6EY18
6EY18 RFQs can include cylinder liners, piston assemblies, injection nozzles, cylinder head gaskets and cooling-system parts. Confirm serial/build and part evidence. Review the dedicated Yanmar 6EY18 spare parts route.
6EY22
6EY22 RFQs can include pistons, exhaust valves, fuel pumps, turbocharger components, governor and speed-control parts. Confirm serial/build and part evidence.
6AYL-ET
6AYL-ET RFQs can include cylinder heads, valve assemblies, injection pumps, heat-exchanger elements and mounting seals. Confirm the installed governor and build evidence.
6AYL-HT
6AYL-HT RFQs can include piston rings, liner O-rings, crankshaft bearings, connecting-rod fasteners and lube-oil-system components. Confirm installed configuration.
6N18
6N18 RFQs can include cylinder liners, piston crowns, exhaust valve seats, fuel injectors, intercooler elements and overhaul kits. Confirm serial/build evidence.
6N21
6N21 RFQs can include cylinder heads, main bearings, camshaft-drive parts, fuel injection pumps and turbocharger cartridges. Confirm serial/build evidence.
6HAL-DT
6HAL-DT RFQs can include piston ring sets, liner kits, injector nozzles, gasket sets and water pump assemblies. Yanmar's current HAL2 generating-set engine is built in five suffix versions, from 6HAL2-N to 6HAL2-WDT, so confirm the full designation and serial/build evidence.
6MAL-HT
6MAL-HT RFQs can include cylinder head assemblies, valve seat inserts, injection equipment, turbocharger interface parts and overhaul kits. Confirm serial/build evidence.
Where the Yanmar marks sit on the engine
Reference photography of a Yanmar V8 marine diesel, which is not one of the commercial families covered on this page. The cast badge and the maker-branded filter confirm the make and nothing more; on an EY, N, AYL, HAL or MAL engine the photograph that identifies the unit is the nameplate, with the full designation and the engine serial number.
Representative licensed photography, not a Vessel Core installed reference or completed job. Engine photo: L.Kenzel, Wikimedia Commons, CC BY-SA 3.0. Vessel Core has no dealership, distribution or partnership agreement with Yanmar; it operates as an independent spare parts supplier.
Two ranges share the badge and almost nothing else
Yanmar runs its marine business on two sides. YANMAR Marine International sells the small engines, the GM, YM and JH families among them, for sailboats, powerboats and light-duty commercial craft. YANMAR Commercial Marine looks after the heavier engines for fishing vessels and merchant ships, and that is the programme covered on this page: the EY, N, AY and HAL families in Yanmar's current listings, and the MAL designation, which does not appear in them. The family letters alone do not show which side an engine belongs to, because the commercial range also lists small YM and JH propulsion engines and a 4JHL generating-set engine. An enquiry that names a 4JH when it means a 6EY18 does not come back with the wrong price; it comes back with a question, and a day is lost to it.
Inside the commercial programme the designation is a formula rather than a name. The leading digit is the cylinder count. The letters after it name the family. In the EY family the number that follows is the bore in centimetres, which is why 6EY18 and 6EY22 are separate engines rather than two ratings of one. Last come the suffix letters, and they are both the part most often dropped from an enquiry and the part that decides which catalogue answers it — the 6EY18 page shows how far that goes on a single family.
These engines are usually met as complete generating sets rather than as bare engines, and that changes what an RFQ has to carry. The alternator is a different make with its own plate. The governor and the automation are often a third and a fourth. A line written against the generator can belong to any of them, and the first thing a route review does is establish which one it is before a price is discussed.
Yanmar marine spare parts supply scope
Planned overhaul components, running spares and time-critical spare parts structured by system and component group for common Yanmar commercial marine engine requests.
- Cylinder heads & head gaskets
- Cylinder liners & liner O-rings
- Piston assemblies & piston rings
- Exhaust valves & valve seat inserts
- Fuel injection pumps & plungers
- Fuel injector nozzles & holders
- Turbocharger cartridges & components
- Main bearings & crankpin shells
- Connecting rod bearings & bolts
- Camshaft bearings & drive components
- Water pump assemblies & impellers
- Heat exchanger elements & seals
- Governor & speed control parts
- Overhaul gasket kits & seal sets
What a commercial Yanmar line is quoted from
Most enquiries on these engines arrive as a set: an engine, an alternator or a reduction gear, a turbocharger and a control system, all under one word. The list below is what turns that word into lines that can be priced. Not every item applies to every request, and a request is worth sending before all of them are in hand.
- Complete designation as stamped, with the cylinder count and every suffix letter
- Engine serial number and year of build from the nameplate; Yanmar's own service organisation keeps each engine's specification and parts-delivery history against that number and matches parts to it
- Whether the unit is a generating set or a propulsion engine, and the reduction gear make where it drives a shaft; Yanmar lists the two under different suffixes, for example 6EY22LW or 6EY22ALW for a generating set and 6EY22AW for propulsion
- Alternator make, type and serial where the line sits at the alternator end
- Turbocharger make and designation from its own plate, since it is a separate make with a separate catalogue
- Governor or automation make and version where the line touches control rather than the engine itself
- Cylinder number the component came off, for any running-gear line
- Old part number and where it came from (the engine's own documents, an earlier delivery note or a marking on the part), treated as a starting point rather than a conclusion; Yanmar states that it does not make its parts catalogue available to customers
- Bearing shells with the undersize stated, and ring sets quoted per cylinder rather than per ring
- Injection equipment split by name — nozzle, holder, pump element or complete pump are four different orders
- Cooling side named as fresh water, sea water or charge air, because the three sit in different part groups
- Running hours since the last top overhaul and since the last full overhaul, given separately
- Whether the item has been reconditioned before, and by whom, since that changes what an alternative has to match; Yanmar runs its own exchange and reconditioning service, including laser cladding, connecting-rod crack removal, liner re-honing and fuel injection pump maintenance, so a part on board may already be a reconditioned unit
- Vessel type and duty, which decide whether the line is routine consumption or a spare held against a survey, and the fuel burned, MDO or HFO, since Yanmar limits some ratings of the 6N165LW to one or the other
- Photographs of the engine nameplate and of the component in place
Tools for this equipment: the Pt100 and thermocouple reader for the temperature sensors, the pressure gauge selector for the engine gauges and the O-ring size finder for loose O-rings. On a generating set, the motor speed calculator works out the alternator frequency from the engine speed and the number of poles.
Yanmar supply routes for engine-room spare parts.
Yanmar requests may need OEM-route review, verified alternative review or both depending on urgency, approval requirements, documentation and budget logic. Vessel Core structures the RFQ around the buyer's technical evidence and vessel timing.
OEM or Alternative — Your Choice
For class-surveyed overhauls or manufacturer-warranty situations, OEM-route review can be requested. For running maintenance and planned spares, verified alternative components can be reviewed when documentation and specification context permit.
Model-specific RFQ review
Yanmar model-family requests can be reviewed when the buyer provides clear engine, installed-duty and part evidence. Model names on this page identify requests only; they do not imply availability, compatibility or any connection with the maker.
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 Yanmar part numbers? We can start the review from engine model, serial number, build year, component description or photographs, then clarify the missing details before supplier outreach.
Port-Call Route Review
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
Generator set failures and auxiliary engine breakdowns receive priority RFQ review. Time-critical Yanmar RFQs are checked against supplier availability, route options, freight options and port timing.
Yanmar parts — common questions
Can Vessel Core review OEM-route and verified alternative routes for Yanmar marine engines?
Yes. We review OEM-route and verified alternative routes for Yanmar 6EY, 6AYL, 6N, 6HAL and 6MAL series marine engine requests. Alternative routes are selected case by case where documentation, quality and specification context permit.
What Yanmar engine models do you cover?
RFQs may reference Yanmar 6EY18, 6EY22, 6AYL-ET, 6AYL-HT, 6N18, 6N21, 6HAL-DT or 6MAL-HT models. Provide the complete nameplate designation, serial/build and part evidence; availability and the supply route are confirmed only in the quotation.
When is a delivery date given for Yanmar spare parts?
We confirm lead time and freight in the quotation. Yanmar EY, AYL, N, HAL and MAL parts are matched to the serial and the installed duty rather than to the family name, and the handover point weighs as much as the part: a fishing harbour or a coastal berth is a different freight leg from a hub port, so we work both out against your actual call.
Can you identify Yanmar parts if I only have the engine model and a description?
Model designation, serial/build information, part description and photographs can start identification review. The final component and supply route are confirmed only after sufficient part-book, drawing or installed-part evidence is available.
Is a small-craft Yanmar such as a 4JH covered by the same catalogue?
Not by default, and the family letters alone will not settle it. Yanmar runs its marine business on two sides: YANMAR Marine International sells the small engines, the GM, YM and JH families among them, for sailboats, powerboats and light-duty commercial craft, while YANMAR Commercial Marine looks after the heavier engines covered on this page. The commercial range also lists small YM and JH propulsion engines and a 4JHL generating-set engine, so send the full designation, serial and installed duty exactly as stamped; a 4JH written where a 6EY18 is meant comes back with a question rather than a price.
What does a designation such as 6EY18 tell you?
In the commercial programme the designation is a formula. The leading digit is the cylinder count and the letters after it name the family; in the EY family the number that follows is the bore in centimetres, which is why 6EY18 and 6EY22 are separate engines rather than two ratings of one. Suffix letters come last, and they are both the part most often dropped and the part that decides which catalogue answers the request.
Is Vessel Core connected to Yanmar?
No, and there is no agreement of any kind. Vessel Core holds no dealership, distribution, representation or partnership agreement with Yanmar, 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 Yanmar spare parts request — vessel name, engine model as stamped on the plate with its suffix (e.g. Yanmar 6EY18ALW rather than 6EY18), engine serial number, part numbers or descriptions, and port/ETA. Vessel Core reviews the supply route and prepares a structured supply quotation.
