Cummins engine models covered
Spare parts supply across the Cummins commercial marine engine programme — from the compact QSB6.7 auxiliary through to the high-output KTA50 and QSK60 powerplants used on large offshore support and anchor handling vessels.
KTA19
KTA19 RFQs can include pistons, liners, cylinder heads, injectors, turbocharger components and gasket sets. Confirm the complete engine identity and installed configuration.
KTA38
The V12 of the mechanical K-series, on the same PT fuel system as the KTA19. Anchor handling tugs and platform supply vessels. Crankshaft bearings, connecting rods, exhaust valves, fuel pump assemblies.
KTA50
The V16 and the largest engine of the K-series, also on PT fuel injection. Heavy anchor handlers and large OSVs. Cylinder liners, piston ring sets, turbocharger cartridges, aftercooler cores, overhaul kits.
QSK19
The electronic successor to the KTA19 in the maker's Quantum System range; the marine QSK19 was introduced with a modular common-rail fuel system, so its injectors and their drive do not cross from a KTA19. Cylinder heads, injector cups, valve seat inserts, camshaft followers, lube oil system components.
QSK38
The V12 of the Quantum System QSK range. Piston assemblies, exhaust valve rotators, fuel injectors, turbocharger cartridges, cooling system spares.
QSK60
The largest Quantum System QSK model listed on this page. Main bearings, piston crowns, cylinder liner sets, complete head assemblies, full overhaul kits.
QSM11
QSM11 RFQs can include injectors, cylinder head gaskets, water pump assemblies, intercooler elements and seal kits. Confirm model, serial and application evidence.
QSB6.7
QSB6.7 RFQs can include piston rings, injector nozzles, turbocharger components, gasket sets and cooling-system parts. Confirm model, serial and application evidence.
Cummins marine spare parts supply scope
Planned overhaul components, running spares, and time-critical spare parts — structured by system and component group for KTA, QSK, QSM, and QSB Cummins commercial marine engines.
- Cylinder heads & head gaskets
- Cylinder liners & liner seals
- Piston assemblies & piston rings
- Exhaust valves & valve rotators
- Fuel injectors & injector cups
- Fuel pump assemblies (PT pumps, common-rail high-pressure pumps) & repair kits
- Holset turbocharger cartridges, housing parts & nozzle rings
- Main bearings & crankpin shells
- Connecting rod bearings & bolts
- Camshaft bearings & followers
- Water pump assemblies & impellers
- Intercooler cores & heat exchanger elements
- Lube oil system components
- Overhaul gasket kits & seal sets
ESN and CPL: what a Cummins line is quoted from
Cummins is unusual among marine engine makers in that the model name is the least useful part of the identification. Two engines can both be QSK19 and take different components, and the numbers that separate them are on the dataplate.
- Engine serial number (ESN) from the dataplate, or as stamped on the block where the plate has gone
- CPL number, four digits, from the same plate — the single most useful figure on a Cummins request
- Model designation as written, with every letter: QSK19 and KTA19 are different engines, and QSB6.7 is not QSM11
- Where on the engine the dataplate was read from, with a photograph wide enough to show what it is fixed to — a plate on a cover or bracket that has been exchanged may belong to another engine
- Duty: propulsion, auxiliary generating set or pump drive, and the rating the engine is set to
- Aftercooler arrangement and whether the installation is keel-cooled or heat-exchanger cooled, where the line touches the cooling side
- Old part number and the photograph of the removed component, which together settle fitment when the CPL is missing
- Bearing shells with the undersize stated, and ring sets quoted per cylinder rather than per ring
- Running hours and whether the engine has been rebuilt, since a rebuild can move a component away from the original CPL
- Photographs of the dataplate 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. To check a consumption figure, the fuel consumption calculator works from the SFOC and the power the engine delivers.
Cummins supply route review — OEM and verified alternative.
Cummins requests may need OEM-route review, verified alternative review or both, depending on lead time, documentation and budget. Vessel Core structures the RFQ around buyer approval needs, technical evidence and port-aware delivery coordination.
OEM or Alternative — Your Choice
For class and flag state compliance on surveyed vessels, OEM-route Cummins parts can be reviewed with documentation requirements confirmed at RFQ stage. For planned maintenance and running spares programmes, verified alternative components can be reviewed where buyer approval and technical specification allow it.
Model-specific RFQ review
KTA, QSK, QSM and QSB model-family requests can be reviewed when the buyer provides complete engine, installed-duty and part evidence. Listing a model here implies neither availability, compatibility nor any affiliation with the maker; availability is confirmed only in the quotation.
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
No Cummins part number available? We can start the review from engine CPL code, serial number, model designation, component photographs or descriptions, then clarify the missing details before supplier outreach.
OSV & Offshore Fleet Ready
Cummins KTA and QSK engines are common across OSVs, PSVs, anchor handling tugs and workboats. Vessel Core reviews each RFQ against vessel timing, port context and the practical supply route confirmed during quotation.
Time-Critical Priority Review
Propulsion failures on Cummins-powered vessels receive priority RFQ review. Time-critical KTA, QSK and QSM RFQs are checked against supplier availability, route options, freight options and port timing.
Cummins parts — common questions
Can Vessel Core review OEM-route and verified alternative routes for Cummins marine engines?
Yes. We review OEM-route and verified alternative routes for KTA, QSK, QSM and QSB series marine engine requests. Alternative routes are selected case by case where documentation, quality and specification permit.
What Cummins engine models do you cover?
RFQs may reference Cummins KTA19, KTA38, KTA50, QSK19, QSK38, QSK60, QSM11 or QSB6.7 configurations. Provide the complete nameplate designation, serial/build and part evidence; availability and route are confirmed only in the quotation.
How are lead time and delivery confirmed for Cummins parts?
We confirm lead time and freight in the quotation, line by line. On KTA, QSK, QSM and QSB requests the serial and build evidence decides the part more than the model name does, so we settle that first and put a date against a line only once a supplier has committed to it.
Can you supply Cummins parts for offshore support vessels and workboats?
Yes. Cummins KTA and QSK series engines are used on OSVs, anchor handling tugs, platform supply vessels, crew boats and workboats. We review spare parts requests for commercial vessel Cummins propulsion and generator set applications with delivery options confirmed during quotation.
What is the CPL on a Cummins dataplate, and why do you need it?
The CPL identifies the component set, the timing specification and the maximum rating the engine was built and approved to. Two engines can both be QSK19 and take different components: a model name without a CPL narrows a part to a family, while a CPL narrows it to a build. Send the CPL from the dataplate together with the engine serial number.
The engine has been rebuilt. Does the original CPL still apply?
Not always. A rebuild can move a component away from the original CPL, so give the running hours and say whether the engine has been rebuilt. Where the CPL is missing or no longer reliable, the old part number and a photograph of the removed component together settle fitment.
Is Vessel Core connected to Cummins?
No, and there is no agreement of any kind. Vessel Core holds no dealership, distribution, representation or partnership agreement with Cummins, and quoting a component against one of its designations implies no approval by the maker and no claim of interchangeability.
Why the maker name appears on this page
Cummins model names, series letters and CPL references appear here for one reason: a buyer cannot describe an engine without them. Their presence carries no claim of appointment. Vessel Core holds no dealership, distribution, representation or partnership agreement with Cummins or with any other manufacturer named on this site, and does not present itself as holding one.
Submit your RFQ now.
Send your Cummins spare parts request — vessel name, engine model (e.g. Cummins KTA38), CPL code or part numbers, and port/ETA. Vessel Core reviews the supply route and prepares a structured supply quotation.
