Komatsu

Alfa Marine Spare Parts supplies genuine, OEM-quality, and selected aftermarket Komatsu marine engine spare parts for commercial fishing vessels, workboats, tugboats, ferries, patrol craft, dredgers, harbour vessels, offshore-support equipment, and marine generator installations.

We support shipowners, shipyards, marine workshops, engine rebuilders, equipment operators, and generator specialists with Komatsu replacement parts for routine maintenance, emergency repairs, and complete engine overhauls.

Our product range includes Komatsu filters, injectors, fuel pumps, water pumps, turbochargers, pistons, cylinder liners, bearings, cylinder heads, cooling-system components, electrical parts, gasket sets, and engine overhaul kits.

Komatsu is best known as a manufacturer of construction, mining, forestry, and industrial equipment. However, Komatsu diesel engines and related engine platforms have also been used in marine propulsion, auxiliary-power, pump-drive, and generator applications.

Komatsu began manufacturing diesel engines in 1948 and later established engine-production partnerships, including Komatsu Cummins Engine Company and Cummins Komatsu Engine Company in 1993.

Common Komatsu engine applications in the marine industry include:

• Commercial fishing vessels
• Workboats
• Harbour craft
• Tugboats
• Patrol boats
• Passenger vessels
• Dredgers
• Barges
• Marine generator sets
• Hydraulic power packs
• Deck-machinery drives
• Emergency pumps
• Offshore equipment

Some Komatsu engines used at sea were supplied as dedicated marine packages, while others were industrial engines marinized by specialist manufacturers. Correct parts identification must therefore always be based on the complete engine model, serial number, arrangement, and installed cooling system.

Komatsu engine model codes can provide useful information about the engine’s configuration.

Common letters used in Komatsu engine designations include:

• D – diesel engine
• S – turbocharged engine on many model families
• A – aftercooled or charge-air-cooled configuration on selected models
• 6 – six-cylinder configuration
• E – emissions or electronic specification on many later engines
• M – used in selected marine engine designations

The exact meaning can vary between generations. Customers should not order parts using only a shortened engine designation.

For example, components for an S6D125, SA6D125, and SAA6D125 may differ even though all three engines belong to the same basic displacement family.

Komatsu 3D Series

Compact Komatsu three-cylinder engines are commonly associated with small industrial equipment, pumps, and generator applications. Selected units may also be installed in small marine auxiliary packages.

Common engine families include:

• Komatsu 3D68
• Komatsu 3D72
• Komatsu 3D74
• Komatsu 3D78
• Komatsu 3D82
• Komatsu 3D84
• Komatsu 3D88

Typical applications include:

• Small marine generator sets
• Emergency pumps
• Hydraulic power packs
• Harbour equipment
• Auxiliary machinery
• Small fishing-vessel equipment

Frequently requested parts include:

• Oil filters
• Fuel filters
• Fuel injectors
• Fuel lift pumps
• Water pumps
• Thermostats
• Starter motors
• Alternators
• Cylinder-head gaskets
• Piston-ring sets
• Complete gasket kits

Popular SEO searches include:

• Komatsu 3D84 engine parts
• Komatsu 3D88 generator parts
• Komatsu 3D84 water pump
• Komatsu 3D88 fuel injector
• Komatsu compact diesel engine parts

Komatsu 4D Series

Komatsu four-cylinder engines are used in industrial machinery, generators, pumps, and selected marinized installations.

Common models include:

• Komatsu 4D84
• Komatsu 4D88
• Komatsu 4D92
• Komatsu 4D94
• Komatsu 4D95
• Komatsu S4D95
• Komatsu 4D98
• Komatsu S4D98
• Komatsu 4D102
• Komatsu S4D102

Typical marine-related applications include:

• Auxiliary generator sets
• Fishing-vessel equipment
• Hydraulic power systems
• Deck machinery
• Emergency pumps
• Small workboat auxiliary engines

Popular replacement parts include:

• Fuel injectors
• Injection pumps
• Fuel lift pumps
• Water pumps
• Oil pumps
• Turbochargers
• Pistons
• Piston rings
• Cylinder liners
• Main bearings
• Connecting-rod bearings
• Cylinder-head gaskets
• Complete overhaul kits

Popular SEO searches include:

• Komatsu 4D95 engine parts
• Komatsu S4D95 marine parts
• Komatsu 4D102 spare parts
• Komatsu S4D102 turbocharger
• Komatsu 4D95 overhaul kit

The Komatsu 6D95 family is a six-cylinder diesel-engine platform used in industrial, generator, and selected marine-related applications.

Common engine models include:

• Komatsu 6D95
• Komatsu S6D95
• Komatsu SA6D95
• Komatsu SAA6D95

Typical applications include:

• Marine generator sets
• Fishing-vessel auxiliaries
• Workboat equipment
• Pump drives
• Hydraulic power units
• Deck machinery
• Industrial marine equipment

Frequently requested components include:

• Fuel injectors
• Injection pumps
• Turbochargers
• Water pumps
• Oil pumps
• Cylinder heads
• Pistons and rings
• Main bearings
• Connecting-rod bearings
• Full gasket sets
• Complete overhaul kits

Popular SEO searches include:

• Komatsu 6D95 parts
• Komatsu S6D95 engine parts
• Komatsu S6D95 injector
• Komatsu S6D95 water pump
• Komatsu S6D95 overhaul kit

The Komatsu 6D102 is a popular six-cylinder platform used in construction equipment, generators, pumps, and selected marine auxiliary installations.

Common models include:

• Komatsu 6D102
• Komatsu S6D102
• Komatsu SA6D102
• Komatsu SAA6D102
• Komatsu S6D102E
• Komatsu SAA6D102E

Typical marine-related applications include:

• Auxiliary generator sets
• Hydraulic power packs
• Workboat equipment
• Dredging pumps
• Deck machinery
• Emergency generators
• Offshore-support equipment

Frequently requested parts include:

• Komatsu 6D102 fuel injectors
• Fuel-injection pumps
• Fuel lift pumps
• Turbochargers
• Water pumps
• Oil pumps
• Cylinder heads
• Pistons
• Cylinder liners
• Bearing sets
• Gasket kits
• Engine overhaul kits

Popular SEO searches include:

• Komatsu 6D102 engine parts
• Komatsu S6D102 marine generator parts
• Komatsu SAA6D102 injector
• Komatsu S6D102 turbocharger
• Komatsu 6D102 overhaul kit

The Komatsu 6D105 is a mechanically controlled six-cylinder diesel engine that remains in service in older machinery, generator sets, and marine auxiliary installations.

Common variants include:

• Komatsu 6D105
• Komatsu S6D105
• Komatsu SA6D105

Typical applications include:

• Marine generators
• Fishing-vessel auxiliaries
• Pump drives
• Workboat deck equipment
• Hydraulic installations
• Harbour machinery

High-demand components include:

• Fuel injectors
• Injection pumps
• Fuel lift pumps
• Turbochargers
• Water pumps
• Pistons
• Piston rings
• Cylinder liners
• Main bearings
• Connecting-rod bearings
• Cylinder-head components
• Complete gasket sets

Popular SEO searches include:

• Komatsu 6D105 parts
• Komatsu S6D105 spare parts
• Komatsu 6D105 injection pump
• Komatsu S6D105 water pump
• Komatsu 6D105 overhaul kit

The 6D108 and related 6M108 engine designations are associated with six-cylinder Komatsu diesel-engine platforms.

Common models include:

• Komatsu 6D108
• Komatsu S6D108
• Komatsu SA6D108
• Komatsu 6M108
• Komatsu 6M108A

The Komatsu 6M108A has appeared in the international marine-engine market as a marine propulsion engine, including used-engine listings.

Typical applications include:

• Commercial fishing boats
• Workboats
• Passenger vessels
• Harbour craft
• Marine generator sets
• Pump drives

Frequently requested parts include:

• Fuel injectors
• Injection pumps
• Turbochargers
• Seawater pumps
• Freshwater pumps
• Heat-exchanger components
• Exhaust-manifold parts
• Pistons and liners
• Bearing sets
• Complete overhaul kits

Popular SEO searches include:

• Komatsu 6M108 marine parts
• Komatsu 6M108A engine parts
• Komatsu 6D108 spare parts
• Komatsu S6D108 turbocharger
• Komatsu 6M108 overhaul kit

The Komatsu 6D114 family is a six-cylinder engine platform used in heavy industrial equipment, generators, pumps, and selected marine auxiliary packages.

Common models include:

• Komatsu 6D114
• Komatsu S6D114
• Komatsu SA6D114
• Komatsu SAA6D114
• Komatsu SAA6D114E-2
• Komatsu SAA6D114E-3
• Komatsu SAA6D114E-5
• Komatsu SAA6D114E-6

Typical marine-related applications include:

• Auxiliary generator sets
• Dredger pump drives
• Hydraulic power packs
• Offshore deck machinery
• Commercial vessel equipment
• Port and harbour machinery

Popular replacement parts include:

• Common-rail injectors
• High-pressure fuel pumps
• Turbochargers
• Electronic sensors
• Water pumps
• Oil pumps
• Cylinder heads
• Pistons and liners
• Bearing sets
• Gasket kits
• Engine control components

Popular SEO searches include:

• Komatsu SAA6D114 engine parts
• Komatsu SAA6D114 injector
• Komatsu S6D114 turbocharger
• Komatsu 6D114 water pump
• Komatsu SAA6D114 overhaul kit

The Komatsu 6D125 is one of the best-known Komatsu six-cylinder heavy-duty engine families.

Common variants include:

• Komatsu 6D125
• Komatsu S6D125
• Komatsu SA6D125
• Komatsu SAA6D125
• Komatsu SAA6D125E
• Komatsu SAA6D125E-2
• Komatsu SAA6D125E-3
• Komatsu SAA6D125E-5
• Komatsu SAA6D125E-6

Typical applications include:

• Marine generator sets
• Dredger systems
• Pump drives
• Offshore equipment
• Tugboat auxiliaries
• Workboat hydraulic systems
• Harbour machinery
• Commercial vessel generators

Frequently requested components include:

• Fuel injectors
• Injector nozzles
• Fuel-injection pumps
• High-pressure pumps
• Turbochargers
• Water pumps
• Oil pumps
• Cylinder heads
• Pistons and liners
• Crankshaft bearings
• Complete gasket sets
• Overhaul kits

Popular SEO searches include:

• Komatsu 6D125 marine parts
• Komatsu S6D125 spare parts
• Komatsu SAA6D125 injector
• Komatsu S6D125 water pump
• Komatsu 6D125 overhaul kit

The Komatsu 6D140 is a large six-cylinder heavy-duty diesel-engine platform used in high-load industrial and auxiliary-power applications.

Common models include:

• Komatsu 6D140
• Komatsu S6D140
• Komatsu SA6D140
• Komatsu SAA6D140
• Komatsu SAA6D140E

Typical marine-related applications include:

• Large marine generator sets
• Dredging equipment
• Pump drives
• Hydraulic power packs
• Offshore equipment
• Port machinery
• Tugboat auxiliaries
• Large workboat systems

Frequently requested parts include:

• Fuel injectors
• Fuel pumps
• Turbochargers
• Water pumps
• Oil pumps
• Cylinder heads
• Pistons
• Cylinder liners
• Connecting rods
• Crankshafts
• Main bearings
• Complete overhaul kits

Popular SEO searches include:

• Komatsu 6D140 engine parts
• Komatsu S6D140 spare parts
• Komatsu SAA6D140 injector
• Komatsu 6D140 turbocharger
• Komatsu S6D140 overhaul kit

The Komatsu 6D155 family is used in heavy-duty equipment, generator sets, pump drives, and industrial marine-related installations.

Common variants include:

• Komatsu 6D155
• Komatsu S6D155
• Komatsu SA6D155
• Komatsu SAA6D155

Typical applications include:

• Large auxiliary generators
• Dredgers
• Offshore machinery
• Hydraulic systems
• Port equipment
• Pump stations
• Commercial vessel support systems

Popular replacement parts include:

• Fuel injectors
• Injection pumps
• Turbochargers
• Water pumps
• Oil pumps
• Cylinder heads
• Pistons and liners
• Connecting rods
• Bearing sets
• Full gasket kits
• Engine overhaul kits

Popular SEO searches include:

• Komatsu 6D155 parts
• Komatsu S6D155 engine parts
• Komatsu S6D155 injector
• Komatsu S6D155 turbocharger
• Komatsu 6D155 overhaul kit

The Komatsu 6D170 is a large-displacement heavy-duty engine family used in demanding industrial and power-generation applications.

Common models include:

• Komatsu 6D170
• Komatsu S6D170
• Komatsu SA6D170
• Komatsu SAA6D170

Potential marine and port-related applications include:

• Large generator packages
• Offshore equipment
• Dredger pump drives
• Port machinery
• Heavy hydraulic systems
• Commercial vessel auxiliaries

Frequently requested components include:

• Fuel injectors
• High-pressure fuel pumps
• Turbochargers
• Water pumps
• Oil pumps
• Cylinder heads
• Pistons and liners
• Connecting rods
• Main bearings
• Crankshaft components
• Complete overhaul kits

Popular SEO searches include:

• Komatsu 6D170 engine parts
• Komatsu S6D170 spare parts
• Komatsu SAA6D170 injector
• Komatsu 6D170 water pump
• Komatsu S6D170 overhaul kit

Selected Komatsu V-type diesel engines have been used in large equipment, stationary power, generator, pump, and specialized heavy-duty applications.

Engine families may include:

• Komatsu 8V140
• Komatsu 8V170
• Komatsu 12V140
• Komatsu 12V170
• Komatsu 16V140
• Komatsu 16V170

Potential applications include:

• Large generator packages
• Offshore power modules
• Pump drives
• Heavy port machinery
• Specialized marine auxiliary systems
• Dredging equipment

Because V-series engines may have highly specific configurations, all parts must be verified using the full model, serial number, arrangement, and application.

Komatsu and Cummins have maintained engine-manufacturing partnerships since the 1990s. Komatsu’s company history records the establishment of Komatsu Cummins Engine Company and Cummins Komatsu Engine Company in October 1993.

This means that some engines installed in Komatsu-powered equipment may use Cummins-derived platforms or components.

Customers should not assume that every engine installed in Komatsu equipment is a fully Komatsu-designed engine. Identification may require:

• Komatsu engine model
• Cummins engine model
• Komatsu equipment serial number
• Cummins engine serial number
• Engine data-plate photograph
• Existing component number

Examples of Cummins engine families associated with Komatsu equipment can include:

• Cummins B Series
• Cummins C Series
• Cummins QSB
• Cummins QSC
• Cummins QSL
• Cummins QSM
• Cummins QSK Series

Parts should always be cross-checked before ordering.

Komatsu engines are used in generator and auxiliary-power packages supporting vessel operations.

Typical generator applications include:

• Main shipboard electricity generation
• Emergency generators
• Fishing-vessel generators
• Dredger generators
• Tugboat auxiliary generators
• Offshore equipment
• Deck machinery
• Pumps and compressors
• Harbour installations
• Port equipment

Common Komatsu generator engine families include:

• Komatsu 3D Series
• Komatsu 4D Series
• Komatsu 6D95
• Komatsu 6D102
• Komatsu 6D105
• Komatsu 6D108
• Komatsu 6D114
• Komatsu 6D125
• Komatsu 6D140
• Komatsu 6D155
• Komatsu 6D170

Exact marine suitability depends on the generator manufacturer, cooling arrangement, classification requirements, and emissions regulations.

Routine Maintenance Parts

• Engine oil filters
• Primary fuel filters
• Secondary fuel filters
• Air filters
• Fuel-water separators
• Crankcase breathers
• V-belts
• Multi-rib belts
• Thermostats
• Service kits
• Hose kits
• O-ring kits

Fuel-System Parts

• Fuel injectors
• Injector nozzles
• Injector holders
• Injector sleeves
• Injector seals
• Mechanical injection pumps
• High-pressure common-rail pumps
• Fuel lift pumps
• Fuel-transfer pumps
• Fuel-filter heads
• Fuel-pressure regulators
• Fuel-pressure sensors
• Fuel lines
• Stop solenoids

Cooling-System Parts

• Freshwater circulation pumps
• Raw-water pumps
• Seawater pumps
• Water-pump repair kits
• Impellers
• Thermostats
• Thermostat housings
• Heat exchangers
• Expansion tanks
• Oil coolers
• Charge-air coolers
• Radiators
• Coolant pipes
• Cooling fans
• Fan hubs
• Seals and O-rings

Engine Overhaul Parts

• Complete overhaul kits
• In-frame overhaul kits
• Pistons
• Piston pins
• Piston-ring sets
• Cylinder liners
• Liner seals
• Connecting rods
• Connecting-rod bushes
• Crankshafts
• Camshafts
• Main bearings
• Connecting-rod bearings
• Thrust bearings
• Tappets
• Timing gears
• Complete gasket sets

Cylinder-Head and Valve Parts

• Complete cylinder heads
• Bare cylinder heads
• Cylinder-head gaskets
• Inlet valves
• Exhaust valves
• Valve guides
• Valve seats
• Valve springs
• Rocker arms
• Rocker shafts
• Pushrods
• Tappets
• Injector sleeves
• Valve-cover gaskets

Turbocharger and Air-System Parts

• Complete turbochargers
• Turbocharger cartridges
• Turbo repair kits
• Compressor wheels
• Turbine wheels
• Wastegate actuators
• Intake manifolds
• Exhaust manifolds
• Air filters
• Charge-air coolers
• Turbocharger oil lines
• Mounting gaskets

Lubrication-System Parts

• Engine oil pumps
• Oil filters
• Oil-filter housings
• Oil coolers
• Oil-pressure regulators
• Oil-pressure switches
• Oil-pressure sensors
• Oil pans
• Dipsticks
• Lubrication pipes
• Front and rear crankshaft seals

Electrical and Electronic Parts

• Starter motors
• Alternators
• Engine control modules
• Electronic control units
• Wiring harnesses
• Instrument panels
• Engine monitors
• Temperature sensors
• Oil-pressure sensors
• Fuel-pressure sensors
• Speed sensors
• Crankshaft sensors
• Camshaft sensors
• Solenoids
• Relays

Exhaust-System Parts

• Exhaust manifolds
• Exhaust elbows
• Dry exhaust components
• Flexible exhaust connections
• Exhaust gaskets
• Mounting studs
• Exhaust-temperature sensors
• Silencers
• Exhaust clamps

Mounting and Drive Components

• Engine mounts
• Flywheels
• Flywheel housings
• Damper plates
• Flexible couplings
• Gearbox adaptors
• Pump-drive couplings
• Pulley assemblies
• Auxiliary drives
• Mounting brackets

Frequently requested Komatsu service and repair products include:

• Komatsu oil filters
• Komatsu fuel filters
• Komatsu air filters
• Komatsu fuel injectors
• Komatsu injector nozzles
• Komatsu fuel pumps
• Komatsu water pumps
• Komatsu thermostats
• Komatsu belts
• Komatsu turbochargers
• Komatsu starter motors
• Komatsu alternators
• Komatsu cylinder-head gaskets
• Komatsu piston-and-liner kits
• Komatsu bearing sets
• Komatsu complete gasket kits
• Komatsu engine overhaul kits

Komatsu’s official parts offering includes genuine and remanufactured engine components distributed through its parts and dealer network.

Komatsu diesel engines and marinized power packages may be used in:

• Commercial fishing vessels
• Workboats
• Tugboats
• Barges
• Dredgers
• Harbour craft
• Passenger boats
• Patrol vessels
• Pilot boats
• Offshore-support equipment
• Deck machinery
• Hydraulic power units
• Pump drives
• Compressors
• Marine generator sets
• Emergency generators
• Port and terminal equipment

Alfa Marine Spare Parts supplies Komatsu engine components to vessel operators, generator specialists, shipyards, repair companies, and marine workshops around the world.

The company names below are included for geographical and industry relevance only. Inclusion does not imply that Alfa Marine Spare Parts is affiliated with, authorized by, or an official supplier to these companies.

United States

Major American shipbuilding and repair facilities include:

• Huntington Ingalls Industries
• Newport News Shipbuilding
• Ingalls Shipbuilding
• General Dynamics NASSCO
• General Dynamics Bath Iron Works
• Fincantieri Marinette Marine
• Austal USA
• Bollinger Shipyards
• Eastern Shipbuilding Group
• Vigor Marine
• Conrad Shipyard
• Gulf Copper
• BAE Systems Jacksonville Ship Repair
• Hanwha Philly Shipyard

Important marine-service markets include:

• Florida
• Louisiana
• Texas
• California
• Washington
• Virginia
• Maine
• Massachusetts
• North Carolina
• South Carolina

United Kingdom

Major British shipyards and repair facilities include:

• Navantia UK
• Cammell Laird
• A&P Falmouth
• A&P Tyne
• A&P Tees
• Babcock Rosyth
• Ferguson Marine
• BAE Systems Maritime
• Pendennis Shipyard
• Portsmouth marine-service facilities

Important UK maritime centres include:

• Southampton
• Portsmouth
• Plymouth
• Falmouth
• Liverpool
• Newcastle
• Aberdeen
• Glasgow
• Belfast

Dubai and the United Arab Emirates

Major shipyards and marine-service centres include:

• Drydocks World Dubai
• Dubai Maritime City
• Grandweld Shipyards
• Albwardy Damen
• Gulf Craft
• Al Seer Marine
• Premier Marine Engineering Services

Important UAE maritime hubs include:

• Dubai Harbour
• Port Rashid
• Jebel Ali
• Abu Dhabi
• Sharjah
• Ras Al Khaimah

Brazil

Major Brazilian shipbuilding and repair centres include:

• Estaleiro Atlântico Sul
• BrasFELS
• Wilson Sons Shipyards
• Estaleiro Rio Grande
• Mauá Shipyard
• Enseada Shipyard
• INACE
• Marina Verolme

Important Brazilian marine markets include:

• Rio de Janeiro
• Niterói
• Santos
• Itajaí
• Angra dos Reis
• Recife
• Salvador
• Fortaleza

Japan

As Komatsu is a Japanese manufacturer, Japan is an important sourcing and technical-support region for legacy Komatsu engines.

Major Japanese shipbuilding groups and maritime centres include:

• Imabari Shipbuilding
• Japan Marine United
• Mitsubishi Heavy Industries
• Oshima Shipbuilding
• Tsuneishi Shipbuilding
• Onomichi Dockyard
• Sanoyas Shipbuilding
• Naikai Zosen

Important Japanese maritime regions include:

• Tokyo
• Yokohama
• Kobe
• Osaka
• Hiroshima
• Imabari
• Nagasaki
• Fukuoka

Netherlands

Major Dutch shipyards include:

• Damen Shipyards
• Damen Shiprepair Rotterdam
• Royal IHC
• Royal Niestern Sander
• Holland Shipyards Group
• De Haas Shipyards

Important Dutch ports and service regions include:

• Rotterdam
• Amsterdam
• IJmuiden
• Vlissingen
• Dordrecht
• Harlingen
• Den Helder

Germany

Major German shipyards include:

• Meyer Werft
• Lürssen
• German Naval Yards
• Fassmer
• Abeking & Rasmussen
• Blohm+Voss

France

Major French shipyards include:

• Chantiers de l’Atlantique
• Naval Group
• Piriou
• OCEA
• Chantier Naval de Marseille
• La Ciotat Shipyards

Italy

Major Italian shipyards and repair centres include:

• Fincantieri
• Sanlorenzo
• Benetti
• Palumbo Superyachts
• CRN
• Rosetti Marino
• Lusben

Spain

Major Spanish shipyards include:

• Navantia
• Astilleros Armón
• Astilleros Gondán
• Freire Shipyard
• Aresa Shipyard
• Metalships & Docks
• MB92 Barcelona

Norway

Major Norwegian shipyards include:

• Vard
• Ulstein Verft
• Myklebust Verft
• Green Yard Kleven
• Larsnes Mek Verksted

Greece

Major Greek shipyards and repair regions include:

• Elefsis Shipyards
• ONEX Neorion Shipyards
• Chalkis Shipyards
• Perama repair zone
• Spanopoulos Group

Croatia

Major Croatian shipyards include:

• Brodosplit
• Maj Shipyard
• Viktor Lenac Shipyard

Komatsu-powered auxiliary equipment, generators, pumps, and port machinery can be serviced in major maritime hubs including:

United States

• Port of Houston
• Port of New Orleans
• Port of Miami
• Port Everglades
• Port of Los Angeles
• Port of Long Beach
• Port of Seattle
• Port of Tacoma
• Port of New York and New Jersey

United Kingdom

• Port of Southampton
• Port of Portsmouth
• Port of Liverpool
• Port of Felixstowe
• Port of London
• Port of Aberdeen
• Port of Glasgow

Dubai and the UAE

• Jebel Ali Port
• Port Rashid
• Dubai Maritime City
• Khalifa Port
• Port of Fujairah
• Port Khalid

Brazil

• Port of Santos
• Port of Rio de Janeiro
• Port of Itajaí
• Port of Paranaguá
• Port of Rio Grande
• Port of Suape

Europe

• Port of Rotterdam
• Port of Antwerp-Bruges
• Port of Hamburg
• Port of Bremerhaven
• Port of Valencia
• Port of Barcelona
• Port of Piraeus
• Port of Genoa
• Port of Marseille Fos

Genuine and Remanufactured Engine Parts

Komatsu continues to support equipment owners through genuine and remanufactured engine parts. Its official parts service allows eligible customers to obtain engine components through Komatsu dealers and its My Komatsu system.

For marine operators using legacy or marinized Komatsu engines, exact availability may depend on:

• Engine age
• Serial number
• Original equipment application
• Marine conversion company
• Regional distributor
• Superseded part numbers

Lower-Emission Engine Technology

Komatsu’s newer industrial engines use technologies such as exhaust-gas recirculation, variable-geometry turbocharging, diesel particulate filtration, and advanced electronic monitoring to meet modern emissions requirements.

These developments primarily relate to construction, mining, and industrial engines. Their use in marine applications must be confirmed for the exact engine package and applicable marine emissions rules.

Hybrid Powertrain Development

In September 2025, Cummins and Komatsu announced an agreement to collaborate on hybrid powertrains for heavy mining equipment. The project is not a marine-engine programme, but it demonstrates the companies’ wider focus on hybridisation and lower-emission heavy-duty power systems.

Important Marine-Range Clarification

Komatsu’s current global public website primarily promotes construction, mining, forestry, industrial equipment, engine parts, and power solutions. A complete current dedicated recreational-marine propulsion range is not prominently published.

For this reason, Alfa Marine Spare Parts should market this page around:

• Komatsu engines used in marine applications
• Komatsu marine generator parts
• Komatsu auxiliary-engine parts
• Legacy Komatsu marine engines
• Komatsu industrial engines in marinized packages
• Komatsu engine overhaul parts
• Komatsu replacement components for workboats and commercial vessels

This wording is more accurate than presenting every Komatsu industrial engine as a factory-built marine propulsion model.

Alfa Marine Spare Parts exports Komatsu engine components to customers in:

• United States
• Canada
• United Kingdom
• Ireland
• Netherlands
• Belgium
• Germany
• France
• Spain
• Portugal
• Italy
• Greece
• Croatia
• Norway
• Denmark
• Poland
• Turkey
• United Arab Emirates
• Saudi Arabia
• Qatar
• Oman
• Brazil
• Guyana
• Suriname
• Caribbean
• Japan
• Singapore
• Malaysia
• Indonesia
• Philippines
• Australia
• New Zealand
• South Africa
• Nigeria
• Ghana
• Angola

Customers choose Alfa Marine Spare Parts for:

• Genuine Komatsu engine parts
• OEM-quality replacement components
• Selected aftermarket alternatives
• Support for legacy Komatsu engines
• Marine generator and auxiliary-engine parts
• Technical parts identification
• Assistance with superseded references
• Worldwide export experience
• Competitive quotations
• Fast shipping to ports and shipyards
• Routine maintenance components
• Complete engine overhaul parts

Komatsu engines are manufactured in many versions for construction machinery, mining equipment, generators, pumps, industrial machinery, and specialized marine installations.

Two engines with the same basic family designation may use different components due to:

• Engine serial-number range
• Turbocharged or naturally aspirated design
• Aftercooled or non-aftercooled configuration
• Mechanical or common-rail fuel system
• Emissions specification
• Cooling arrangement
• Generator or propulsion application
• Original equipment installation
• Marine conversion package
• Regional specification

Before ordering, customers should provide:

• Complete Komatsu engine model
• Engine serial number
• Existing Komatsu part number
• Equipment or generator model
• Propulsion, generator, pump, or auxiliary application
• Cooling-system configuration
• Photograph of the engine data plate
• Photographs of the existing component
• Required quantity
• Delivery country and port

Looking for Komatsu 3D, 4D, 6D95, 6D102, 6D105, 6D108, 6M108, 6D114, 6D125, 6D140, 6D155, or 6D170 engine parts?

Send Alfa Marine Spare Parts your:

• Complete engine model
• Engine serial number
• Required part numbers
• Product descriptions
• Equipment or vessel application
• Quantities
• Photographs
• Delivery destination

We supply genuine, OEM-quality, and selected aftermarket Komatsu engine components for marine generators, auxiliary engines, industrial marine equipment, routine servicing, emergency repairs, and complete engine overhauls.

Alfa Marine Spare Parts – Your Worldwide Supplier of Komatsu Marine, Auxiliary and Generator Engine Parts.

Do you supply Komatsu marine engine parts?

Yes. Alfa Marine Spare Parts supplies selected genuine, OEM-quality, and aftermarket components for Komatsu engines used in marine propulsion, auxiliary-power, generator, pump, and industrial marine installations.

Which Komatsu engine families do you support?

We can source components for many Komatsu engine families, including the 3D, 4D, 6D95, 6D102, 6D105, 6D108, 6M108, 6D114, 6D125, 6D140, 6D155, and 6D170 series.

Availability depends on the complete engine model and serial number.

Are all Komatsu diesel engines marine engines?

No. Many Komatsu diesel engines were originally designed for construction, mining, generator, or industrial use. Some were later incorporated into marinized propulsion, generator, pump, or auxiliary packages.

The installed engine and marine conversion must be identified before parts are ordered.

Do you supply Komatsu marine generator parts?

Yes. We supply selected filters, injectors, fuel pumps, water pumps, turbochargers, sensors, electrical components, gasket sets, and overhaul parts for Komatsu-powered generator installations.

Can you identify a Komatsu part using the engine serial number?

Yes. Customers should provide the complete engine model, serial number, existing part number, equipment model, and clear photographs of the data plate and component.

Do you supply Komatsu–Cummins engine parts?

We can help identify parts for selected engines produced through Komatsu and Cummins partnerships. The Komatsu and Cummins engine serial numbers should be provided because the correct reference may belong to either parts system.

Do you supply parts for older Komatsu engines?

Yes. We can source many components for legacy Komatsu mechanical engines, subject to model, serial number, and availability.

Do you ship Komatsu engine parts worldwide?

Yes. We arrange international delivery to shipowners, workshops, generator specialists, shipyards, ports, offshore operators, and marine-service companies worldwide.

Can you supply complete Komatsu overhaul kits?

Depending on the engine model, we can source complete overhaul kits, in-frame kits, piston-and-liner kits, bearing sets, gasket sets, cylinder-head components, and related rebuild parts.