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. 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
Direct turbocharged HAL auxiliary. Compact high-speed configuration. Piston ring sets, liner kits, injector nozzles, gasket sets, water pump assemblies.
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 SY-series marine diesel — the cast badge and the filter marking are the two places worth photographing when you prepare an RFQ.
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
The Yanmar name sits on two ranges that have very little in common. One is the small-craft programme — the GM, YM, JH and LY families that power yachts, launches and small workboats. The other is the commercial marine programme covered on this page: the medium-speed EY, AY, N, HAL and MAL engines that drive generating sets and propulsion on merchant tonnage. They do not share a parts catalogue, a numbering scheme or a supply route. 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 maker 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
- Whether the unit is a generating set or a propulsion engine, and the reduction gear make where it drives a shaft
- 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 maker 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 the catalogue 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
- 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
- Vessel type and duty, which decide whether the line is routine consumption or a spare held against a survey
- Photographs of the engine nameplate and of the component in place
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 listed on this page do not imply stock, compatibility or authorised-dealer status.
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.
How quickly can Yanmar 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 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.
Submit your RFQ now.
Send your Yanmar spare parts request — vessel name, engine model (e.g. Yanmar 6N21), part numbers or descriptions, and port/ETA. Vessel Core reviews the supply route and prepares a structured supply quotation.
