Part-number led
Start from the catalogue number, drawing reference or old-part marking instead of relying on a name alone.
By Brand / Engine Systems
Marine engine spare parts
Caterpillar
Marine propulsion and auxiliary engine parts
Caterpillar marine requests are matched from the engine family, serial prefix and part number wherever possible. Photos of the nameplate and removed component help separate similar-looking options.
01Matched by part number, engine data and technical documents; source, condition and lead time are confirmed line by line.
Independent sourcing service. Maker names and marks identify the requested equipment only; no authorization or affiliation is implied. Directory entries are not a compatibility or stock list.
Supply line overview
Marine propulsion and auxiliary engine parts
Fuel systems, cylinder components, valve train, filters, cooling and turbocharger-related parts.
Evidence check
Model, serial, dimensions, photos and quantity determine whether a candidate source can enter the formal quotation.
Line-by-line
Original-maker, documented third-party and replacement options are stated separately against your preference and evidence.
Parts system
Caterpillar spare parts directory
Each system opens into individual part families with the model, number, dimensions or photos needed for a useful RFQ.
01
Cylinder & Power ComponentsCombustion, load-bearing and reciprocating parts at the centre of the engine.
Combustion, load-bearing and reciprocating parts at the centre of the engine. Open an individual item to see the parameters and evidence normally checked for this line.
Pistons and piston rings
Subparts & supply scope
- Piston crown
- Piston skirt
- Compression rings
- Oil-control rings (where fitted)
Identification parameters
- Bore
- Ring width and radial thickness
- Groove position
- Crown / skirt scope
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Cylinder liner
Subparts & supply scope
- Cylinder liner
- Liner sealing rings
- Cooling jacket seals
Identification parameters
- Bore and overall length
- Flange profile
- Cooling arrangement
- Drawing revision
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Cylinder head / cover
Subparts & supply scope
- Bare cylinder head
- Complete head assembly
- Studs and nuts
- Cover seals
Identification parameters
- Casting or drawing number
- Bare or assembled
- Valve arrangement
- Included components
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Connecting rod and bush
Subparts & supply scope
- Connecting rod
- Small-end bush
- Big-end bearing shells
- Rod bolts
Identification parameters
- Rod marking
- Small / big-end dimensions
- Bearing grade
- Bolt specification
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Main and crankshaft bearings
Subparts & supply scope
- Main bearing shells
- Crankpin bearing shells
- Thrust washers
Identification parameters
- Journal position
- Standard or repair size
- Shell marking
- Oil-hole arrangement
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →02
Fuel & Injection SystemMetering, injection and starting-air items that depend heavily on exact engine configuration.
Metering, injection and starting-air items that depend heavily on exact engine configuration. Open an individual item to see the parameters and evidence normally checked for this line.
Fuel injection pump
Subparts & supply scope
- Complete pump
- Plunger and barrel
- Delivery valve
- Pump seal kit
Identification parameters
- Pump maker and type
- Element marking
- Drive arrangement
- Test-document requirement
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Fuel injector and nozzle
Subparts & supply scope
- Complete injector
- Nozzle and needle
- Holder
- Injector seal kit
Identification parameters
- Injector type
- Nozzle marking
- Engine configuration
- Test scope to be agreed
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Fuel valve
Subparts & supply scope
- Fuel valve assembly
- Valve spindle
- Nozzle
- Sealing components
Identification parameters
- Valve designation
- Part-number suffix
- Fuel-system configuration
- Assembly scope
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →High-pressure fuel pipe
Subparts & supply scope
- Injection pipe
- Double-wall pipe (where fitted)
- Union nuts
- Pipe supports
Identification parameters
- Cylinder position
- Pipe route
- End connection
- Length and drawing
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Starting air valve
Subparts & supply scope
- Starting valve assembly
- Valve spindle
- Spring
- Seals and seat
Identification parameters
- Valve marking
- Mounting dimensions
- Connection type
- Operating specification from manual
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →03
Valve Train & TimingValve, guide, spring and timing-drive items with strong model and drawing dependence.
Valve, guide, spring and timing-drive items with strong model and drawing dependence. Open an individual item to see the parameters and evidence normally checked for this line.
Exhaust valve
Subparts & supply scope
- Valve assembly
- Spindle
- Seat ring
- Actuation seals
Identification parameters
- Engine configuration
- Spindle marking
- Seat dimensions
- Actuation type
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Valve seat and spindle
Subparts & supply scope
- Seat ring
- Valve spindle
- Rotator (where fitted)
Identification parameters
- Seat outer diameter
- Spindle length
- Face profile
- Material from drawing
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Camshaft and cam elements
Subparts & supply scope
- Camshaft section
- Cam element
- Camshaft bush
- Timing-drive parts
Identification parameters
- Shaft section and position
- Cam profile / drawing
- Drive arrangement
- Engine revision
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Roller guide
Subparts & supply scope
- Guide assembly
- Roller
- Pin
- Guide bush
Identification parameters
- Guide designation
- Roller diameter
- Pin dimensions
- Mounting location
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Valve guide, spring and retainer
Subparts & supply scope
- Valve guide
- Spring
- Retainer
- Collets
Identification parameters
- Inlet or exhaust
- Guide dimensions
- Spring reference
- Retainer arrangement
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →04
Air, Exhaust & TurbochargingAir-side and exhaust-side parts where dimensions, core arrangement and configuration matter.
Air-side and exhaust-side parts where dimensions, core arrangement and configuration matter. Open an individual item to see the parameters and evidence normally checked for this line.
Air cooler element
Subparts & supply scope
- Complete cooler core
- Tube bundle
- Water-box gaskets
- Sealing kit
Identification parameters
- Cooler maker / model
- Core length × width × depth
- Tube / fin arrangement
- Material and flange drawing
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Turbocharger cartridge and bearings
Subparts & supply scope
- Cartridge
- Rotor assembly
- Journal / thrust bearings
- Seal rings
Identification parameters
- Turbocharger maker / type
- Serial number
- Rotor specification
- Inspection documents
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Exhaust gas valve
Subparts & supply scope
- Bypass valve
- Wastegate (where fitted)
- Actuator
- Valve sealing kit
Identification parameters
- Valve function
- Valve maker / type
- Flange size
- Actuator configuration
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Air filter element
Subparts & supply scope
- Intake filter
- Filter insert
- Filter housing seals
Identification parameters
- Filter part number
- Outer / inner diameter
- Height
- End-cap arrangement
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Scavenge air system parts
Subparts & supply scope
- Non-return flaps
- Flap seats
- Drain components
- Receiver seals
Identification parameters
- Two-stroke system designation
- Installation position
- Flap dimensions
- Drawing number
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →05
Gaskets, Seals & Service KitsReplacement sets and sealing items grouped by service task, not just by a single loose part.
Replacement sets and sealing items grouped by service task, not just by a single loose part. Open an individual item to see the parameters and evidence normally checked for this line.
Cylinder head gasket set
Subparts & supply scope
- Head gasket
- Water seals
- Oil seals
- Cover gaskets
Identification parameters
- Engine configuration
- Gasket thickness / grade
- Bore
- Kit contents
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →O-rings and seals
Subparts & supply scope
- O-rings
- Shaft seals
- Lip seals
- Backup rings
Identification parameters
- Inner diameter and section
- Material
- Working fluid
- Temperature from specification
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Overhaul gasket set
Subparts & supply scope
- Top-overhaul set
- Full-overhaul set
- System-specific seal kit
Identification parameters
- Overhaul scope
- Engine serial
- Number of cylinders
- Itemised kit list
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Copper washers and sealing rings
Subparts & supply scope
- Copper washers
- Crush seals
- Bonded seals
Identification parameters
- Inner / outer diameter
- Thickness
- Material specification
- Sealing location
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Fasteners and locking parts
Subparts & supply scope
- Studs
- Bolts and nuts
- Lock plates
- Retaining rings
Identification parameters
- Thread and pitch
- Length
- Strength grade
- Locking arrangement
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →06
Engine Support & ConsumablesSupporting parts and routine maintenance items often ordered with an overhaul package.
Supporting parts and routine maintenance items often ordered with an overhaul package. Open an individual item to see the parameters and evidence normally checked for this line.
Fuel and lube-oil filters
Subparts & supply scope
- Fuel filter
- Lube-oil filter
- Bypass element
- Filter seals
Identification parameters
- Maker part number
- Dimensions
- Filter rating from specification
- Housing type
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Cooling-water pump parts
Subparts & supply scope
- Impeller
- Pump shaft
- Mechanical seal
- Bearing and gasket kit
Identification parameters
- Pump maker / type
- Fresh or sea water
- Impeller dimensions
- Seal arrangement
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Thermostatic elements
Subparts & supply scope
- Thermostatic insert
- Valve element
- Seal kit
Identification parameters
- Valve maker / type
- Temperature marking
- Element dimensions
- Number of elements
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Flexible coupling parts
Subparts & supply scope
- Flexible element
- Rubber blocks
- Bolts
- Coupling bushes
Identification parameters
- Coupling maker / type
- Element marking
- Size / hardness specification
- Arrangement drawing
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Wear parts and maintenance kits
Subparts & supply scope
- Scheduled-service kit
- Pump service kit
- Valve service kit
- Consumable package
Identification parameters
- Service task
- Engine running-hour interval
- Requested item list
- Quantities per engine
Send the identification details you already have. Scope depends on equipment configuration; any extra model, part-number or dimensional information needed is checked before quotation.
Not sure about the model or part number?
Use public maker documents to help identify the item, or send the photos and information you already have. Reading a manual is not required before you inquire.
Browse maker technical documents →Model and document check
Prepare the information that makes a quotation useful
Similar names are not treated as compatibility promises; these inputs are the shortest route to a checked quotation.
01Engine model / family
The complete designation from the nameplate, catalogue or drawing, not just the maker name.
02Serial / build number
Helps separate configurations and revisions within the same family.
03Part / drawing number
Send the number exactly as printed, including dashes, suffixes and revision information.
04Condition / quantity
State whether you need new, reconditioned, replacement or quotation-only supply, plus quantity per engine.
Frequently asked questions
Clarify the points that cause the most confusion
Is the maker name and part name enough?
Usually not. Similar names can map to different models, revisions or dimensions; include the model, part number, quantity and photos where possible.
Can I ask for a replacement option?
Yes, but interchangeability is not assumed. We separate original-maker, documented third-party and replacement sources in the quotation against the available evidence.
What is needed for an air cooler element?
Provide the cooler designation, engine model, core length/width/depth, tube or fin arrangement, material, quantity and old-part photos. Open the “Air cooler element” item above for the checklist.
Other brand pages
Continue by maker
Line-item quotation
Start an inquiry Send the part number for a line-item quotation
State whether you prefer original-maker, documented third-party or replacement supply in the inquiry.