Wärtsilä

Alfa Marine Spare Parts supplies genuine, OEM-quality, and selected aftermarket Wärtsilä marine engine spare parts for cruise ships, ferries, offshore-support vessels, fishing vessels, tugboats, cargo ships, research vessels, naval craft, dredgers, icebreakers, yachts, and marine generator installations.

We support shipowners, vessel-management companies, shipyards, marine workshops, engine rebuilders, power-management companies, and offshore operators with Wärtsilä replacement components for scheduled servicing, emergency repairs, engine overhauls, and lifecycle maintenance.

Our Wärtsilä marine parts range includes:

• Fuel injectors
• Fuel-injection pumps
• Common-rail components
• Dual-fuel engine components
• Turbochargers
• Cylinder heads
• Pistons and cylinder liners
• Connecting rods
• Main and connecting-rod bearings
• Freshwater pumps
• Lubricating-oil pumps
• Charge-air coolers
• Filters
• Gaskets and seals
• Engine-control components
• Complete overhaul parts

Wärtsilä manufactures medium-speed four-stroke engines, marine generating sets, fuel-supply systems, emissions-control equipment, propulsion systems, automation products, and lifecycle services for the international maritime industry.

The current published marine-engine portfolio includes engine families such as:

• Wärtsilä 20
• Wärtsilä 20DF
• Wärtsilä 25
• Wärtsilä 25DF
• Wärtsilä 25 Ammonia
• Wärtsilä 31
• Wärtsilä 31DF
• Wärtsilä 31SG
• Wärtsilä 32
• Wärtsilä 32M
• Wärtsilä 32 Methanol
• Wärtsilä 34DF
• Wärtsilä 46F
• Wärtsilä 46TS-DF

These engines are used for mechanical propulsion, diesel-electric propulsion, gas-electric propulsion, onboard power generation, and auxiliary applications.

Wärtsilä engine designations frequently contain information about the engine family, cylinder arrangement, and fuel configuration.

Examples include:

• 6L20 – six-cylinder inline Wärtsilä 20
• 8L20 – eight-cylinder inline Wärtsilä 20
• 9L20 – nine-cylinder inline Wärtsilä 20
• 8L25 – eight-cylinder inline Wärtsilä 25
• 10V31 – ten-cylinder V-configuration Wärtsilä 31
• 12V32 – twelve-cylinder V-configuration Wärtsilä 32
• 16V34DF – sixteen-cylinder V-configuration Wärtsilä 34 dual-fuel engine
• 12V46F – twelve-cylinder V-configuration Wärtsilä 46F
• 14V46TS-DF – fourteen-cylinder V-configuration, two-stage turbocharged dual-fuel engine

Common designation letters include:

• L – inline cylinder arrangement
• V – V-type cylinder arrangement
• DF – dual-fuel engine
• SG – spark-ignited gas engine
• F – selected high-output engine generation
• TS – two-stage turbocharging
• M – selected modernized engine configuration

Exact interpretation and parts compatibility must always be confirmed using the complete engine type, serial number, installation number, component reference, and vessel application.

The Wärtsilä 20 is a compact medium-speed diesel engine used for propulsion and auxiliary-power applications.

Common models include:

• Wärtsilä 4L20
• Wärtsilä 6L20
• Wärtsilä 8L20
• Wärtsilä 9L20

Dual-fuel variants include:

• Wärtsilä 6L20DF
• Wärtsilä 8L20DF
• Wärtsilä 9L20DF

Typical applications include:

• Tugboats
• Small ferries
• Offshore-support vessels
• Fishing vessels
• Research craft
• Harbour vessels
• Marine generator sets
• Diesel-electric propulsion systems

The Wärtsilä 20 is part of the company’s current diesel and dual-fuel marine-engine portfolio and is promoted for compact propulsion and onboard-power installations.

Frequently requested parts include:

• Fuel injectors
• Injector nozzles
• Fuel pumps
• Cylinder-head components
• Pistons and rings
• Cylinder liners
• Connecting-rod bearings
• Main bearings
• Water pumps
• Lubricating-oil pumps
• Turbocharger components
• Complete gasket sets
• Wärtsilä 20 marine parts
• Wärtsilä 6L20 spare parts
• Wärtsilä 8L20 fuel injector
• Wärtsilä 9L20 cylinder head
• Wärtsilä 20DF engine parts
• Wärtsilä 20 overhaul parts

Legacy Wärtsilä 22 engines remain installed in older ferries, fishing vessels, offshore vessels, cargo ships, and generator installations.

Common models include:

• Wärtsilä 4R22
• Wärtsilä 6R22
• Wärtsilä 8R22
• Wärtsilä 6L22
• Wärtsilä 8L22
• Wärtsilä 12V22
• Wärtsilä 16V22
• Wärtsilä 22HF

Frequently requested components include:

• Fuel injectors
• Injection-pump parts
• Exhaust valves
• Inlet valves
• Cylinder-head gaskets
• Pistons and liners
• Turbocharger parts
• Cooling-water pumps
• Bearings
• Complete overhaul components
• Wärtsilä 22 engine parts
• Wärtsilä 6R22 spare parts
• Wärtsilä 8R22 injector
• Wärtsilä 12V22 overhaul parts
• Wärtsilä 22HF marine parts

The Wärtsilä 25 is a modern, fuel-flexible medium-speed engine platform intended for propulsion and onboard power.

Current engine options include:

• Wärtsilä 25 diesel
• Wärtsilä 25DF
• Wärtsilä 25 Ammonia

Typical applications include:

• Short-sea cargo vessels
• Offshore-support vessels
• LNG bunker vessels
• Tugboats
• Ferries
• Hybrid-powered vessels
• Auxiliary generating sets

Wärtsilä promotes the 25 platform as a versatile engine suitable for different vessel types and future-fuel pathways.

Common replacement categories include:

• Common-rail injectors
• High-pressure fuel pumps
• Dual-fuel control components
• Gas-admission components
• Pilot-fuel parts
• Cylinder heads
• Pistons and liners
• Turbocharger components
• Sensors
• Electronic control modules
• Gaskets and seals
• Wärtsilä 25 marine parts
• Wärtsilä 25DF spare parts
• Wärtsilä 25 ammonia engine parts
• Wärtsilä 25 fuel injector
• Wärtsilä 25 cylinder head
• Wärtsilä 25 overhaul kit

The Wärtsilä 25 Ammonia is a four-stroke marine engine developed for ammonia-fuelled vessel applications.

In April 2026, Wärtsilä announced increased output for the engine of:

• 315 kW per cylinder at 900 rpm
• 345 kW per cylinder at 1,000 rpm

The increased output matches the published power level of the LNG-fuelled Wärtsilä 25DF platform.

The engine received its first classification-society type approvals in 2025.

A Wärtsilä 25 Ammonia solution was selected for a new Skarv Shipping cargo vessel, with equipment delivery scheduled to begin in the fourth quarter of 2026.

Potential parts and service categories include:

• Ammonia fuel-supply components
• Pilot-fuel equipment
• Fuel valves
• Ignition and combustion components
• Cylinder heads
• Pistons and liners
• Sealing components
• Sensors
• Control-system components
• Exhaust aftertreatment components

Ammonia engines require specialized maintenance, fuel-safety procedures, approved materials, and trained personnel.

The Wärtsilä 26 is a widely installed legacy medium-speed diesel-engine family.

Common models include:

• Wärtsilä 6L26
• Wärtsilä 8L26
• Wärtsilä 9L26
• Wärtsilä 12V26
• Wärtsilä 16V26

Typical applications include:

• Ferries
• Cargo vessels
• Fishing vessels
• Offshore-support vessels
• Dredgers
• Marine generator sets
• Diesel-electric installations

The Wärtsilä service range continues to reference the W26 alongside current and legacy engines for upgrades and auxiliary components.

High-demand parts include:

• Fuel injectors
• Fuel pumps
• Exhaust valves
• Cylinder heads
• Pistons and liners
• Connecting rods
• Main bearings
• Turbochargers
• Water pumps
• Oil pumps
• Gasket sets
• Wärtsilä 26 engine parts
• Wärtsilä 6L26 spare parts
• Wärtsilä 8L26 injector
• Wärtsilä 12V26 cylinder head
• Wärtsilä 16V26 overhaul parts

The Wärtsilä 31 is a medium-speed four-stroke engine designed for high efficiency and demanding marine operating profiles.

It is available in configurations from eight to sixteen cylinders, with published power output ranging from approximately 4.6 to 10.4 MW at 720 or 750 rpm.

Common models include:

• Wärtsilä 8L31
• Wärtsilä 10V31
• Wärtsilä 12V31
• Wärtsilä 14V31
• Wärtsilä 16V31

Fuel configurations include:

• Wärtsilä 31 diesel
• Wärtsilä 31DF
• Wärtsilä 31SG

The Wärtsilä 31SG is available in eight- to sixteen-cylinder configurations with published power output from approximately 4.2 to 8.8 MW.

Typical applications include:

• Cruise ships
• Ferries
• Offshore-support vessels
• Icebreakers
• Fishing vessels
• Research vessels
• Merchant ships
• Diesel-electric propulsion
• Gas-electric propulsion

Frequently requested parts include:

• Fuel injectors
• Gas-admission valves
• Pilot-fuel injectors
• Cylinder heads
• Exhaust valves
• Pistons and liners
• Connecting rods
• Main bearings
• Turbocharger parts
• Charge-air cooler parts
• Sensors
• Control-system components
• Wärtsilä 31 marine parts
• Wärtsilä 31DF spare parts
• Wärtsilä 31SG engine parts
• Wärtsilä 8L31 fuel injector
• Wärtsilä 12V31 cylinder head
• Wärtsilä 16V31 overhaul parts

The Wärtsilä 32 is one of the company’s most widely used medium-speed engine platforms. It is designed for propulsion and onboard power, with an emphasis on efficient maintenance and long operating periods between major service events.

Common models include:

• Wärtsilä 6L32
• Wärtsilä 7L32
• Wärtsilä 8L32
• Wärtsilä 9L32
• Wärtsilä 12V32
• Wärtsilä 16V32
• Wärtsilä 18V32

Related and legacy designations include:

• Wärtsilä 32M
• Wärtsilä Vasa 32
• Wärtsilä Vasa 32LN
• Wärtsilä Vasa 32LNE
• Wärtsilä Vasa 32GD

Typical applications include:

• Ferries
• Fishing vessels
• Offshore-support vessels
• Cargo ships
• Cruise ships
• Dredgers
• Research vessels
• Naval vessels
• Generator installations

Frequently requested Wärtsilä 32 parts include:

• Fuel injectors
• Injection pumps
• Cylinder heads
• Exhaust valves
• Valve seats
• Pistons
• Cylinder liners
• Connecting rods
• Main bearings
• Turbocharger parts
• Water pumps
• Oil pumps
• Complete gasket sets
• Wärtsilä 32 marine parts
• Wärtsilä 6L32 spare parts
• Wärtsilä 8L32 fuel injector
• Wärtsilä 12V32 cylinder head
• Wärtsilä Vasa 32 parts
• Wärtsilä 32 overhaul parts

The Wärtsilä 32 methanol engine can operate on:

• Methanol
• Heavy fuel oil
• Marine diesel oil
• Liquid biofuel

Wärtsilä states that the platform is available for newbuild and retrofit projects. Its methanol experience includes the Stena Germanica ferry, which has operated with methanol propulsion since 2015.

Methanol-related parts and systems may include:

• Methanol fuel-injection equipment
• Fuel-supply pumps
• Fuel valves
• Fuel-control units
• Double-wall fuel piping
• Seals and compatible elastomers
• Pilot-fuel systems
• Sensors
• Safety-control components
• Exhaust aftertreatment parts
• Wärtsilä 32 methanol engine parts
• Wärtsilä methanol fuel-system parts
• Wärtsilä 32 retrofit parts
• Wärtsilä methanol injector
• Wärtsilä dual-fuel conversion parts

The Wärtsilä 34DF is a dual-fuel engine designed to operate on LNG or conventional liquid marine fuels.

It can be installed as:

• Mechanical-drive main propulsion
• Diesel-electric propulsion
• Gas-electric propulsion
• Auxiliary generating set

Typical vessel applications include:

• LNG carriers
• Offshore-support vessels
• Tugboats
• Ferries
• Cruise ships
• LNG bunker vessels
• Research vessels

Wärtsilä describes the 34DF as a flexible dual-fuel platform suitable for mechanical drive and diesel- or gas-electric applications.

Common configurations include:

• Wärtsilä 6L34DF
• Wärtsilä 8L34DF
• Wärtsilä 9L34DF
• Wärtsilä 12V34DF
• Wärtsilä 16V34DF
• Wärtsilä 20V34DF

The published generator range includes inline and V-type configurations, including 6L34DF through larger V-engine arrangements.

Frequently requested parts include:

• Gas-admission valves
• Pilot-fuel injectors
• Fuel injectors
• Cylinder heads
• Spark and ignition-related components where applicable
• Pistons and liners
• Turbocharger parts
• Charge-air cooler components
• Gas-system sensors
• Automation components
• Gaskets and sealing parts
• Wärtsilä 34DF marine parts
• Wärtsilä 6L34DF spare parts
• Wärtsilä 12V34DF injector
• Wärtsilä 16V34DF cylinder head
• Wärtsilä 20V34DF overhaul parts
• Wärtsilä dual-fuel engine parts

The Wärtsilä 38 is a legacy medium-speed marine-engine family still installed in ferries, cargo ships, cruise vessels, offshore installations, and generator plants.

Common models include:

• Wärtsilä 6L38
• Wärtsilä 8L38
• Wärtsilä 9L38
• Wärtsilä 12V38
• Wärtsilä 16V38
• Wärtsilä 18V38

The Wärtsilä service portfolio continues to identify W38 engines among platforms supported by selected engine upgrades.

Frequently requested parts include:

• Fuel injectors
• Fuel-pump parts
• Cylinder heads
• Exhaust valves
• Pistons and liners
• Connecting rods
• Bearings
• Turbocharger parts
• Cooling-water pumps
• Lubricating-oil pumps
• Gaskets and seals
• Wärtsilä 38 marine parts
• Wärtsilä 6L38 spare parts
• Wärtsilä 12V38 fuel injector
• Wärtsilä 16V38 cylinder head
• Wärtsilä 18V38 overhaul parts

The Wärtsilä 46 family is used for high-output propulsion and onboard power in larger vessels.

Legacy and current models include:

• Wärtsilä 6L46
• Wärtsilä 8L46
• Wärtsilä 9L46
• Wärtsilä 12V46
• Wärtsilä 16V46
• Wärtsilä 18V46
• Wärtsilä 46F
• Wärtsilä 46TS-DF

Typical applications include:

• Cruise ships
• Large passenger ferries
• Offshore vessels
• LNG carriers
• Merchant vessels
• Naval vessels
• Large generator installations

The Wärtsilä 46F is a four-stroke medium-speed engine family available in inline and V-type cylinder configurations.

Wärtsilä publishes a power range of approximately 7.5 to 20 MW at 600 rpm, with engines available from 6L to 16V configurations.

Common models include:

• Wärtsilä 6L46F
• Wärtsilä 8L46F
• Wärtsilä 9L46F
• Wärtsilä 12V46F
• Wärtsilä 16V46F

Typical applications include:

• Cruise ships
• Ferries
• Merchant vessels
• Offshore installations
• Large fishing vessels
• Naval applications
• Diesel-electric propulsion systems

Frequently requested parts include:

• Common-rail injectors
• High-pressure fuel pumps
• Cylinder heads
• Exhaust valves
• Pistons and liners
• Connecting rods
• Main bearings
• Turbocharger components
• Charge-air coolers
• Automation components
• Gasket sets
• Wärtsilä 46F marine parts
• Wärtsilä 6L46F spare parts
• Wärtsilä 12V46F injector
• Wärtsilä 16V46F cylinder head
• Wärtsilä 46F overhaul parts

The Wärtsilä 46TS-DF is a two-stage turbocharged dual-fuel engine for high-output marine applications.

Published power output ranges from approximately 7.8 to 20.8 MW. Typical applications include cruise ships, large ferries, LNG-related vessels, and merchant ships.

Common replacement categories include:

• Pilot-fuel injectors
• Gas-admission components
• Two-stage turbocharger parts
• Charge-air cooling components
• Cylinder heads
• Pistons and liners
• Main and connecting-rod bearings
• Automation components
• Sensors
• Gas-system seals and valves
• Wärtsilä 46TS-DF parts
• Wärtsilä dual-fuel cruise-ship engine parts
• Wärtsilä 46TS injector
• Wärtsilä 46TS turbocharger parts
• Wärtsilä 46TS-DF overhaul components

Many older Wärtsilä, Vasa, Nohab, and Sulzer engines remain in operation worldwide.

Legacy engine families include:

• Wärtsilä Vasa 22
• Wärtsilä Vasa 32
• Wärtsilä Vasa 32LN
• Wärtsilä Vasa 32LNE
• Wärtsilä 38
• Wärtsilä 46
• Wärtsilä 50DF
• Wärtsilä 64
• Sulzer 20
• Sulzer 25
• Sulzer 40
• Sulzer ZA40
• Sulzer ZA40S
• Sulzer Z40
• Nohab Polar engines

Wärtsilä’s current service catalogue references legacy platforms including W26, W38, W46, W50, W64, and Sulzer 40 engines.

Common legacy-engine parts include:

• Fuel injectors
• Fuel-pump elements
• Delivery valves
• Exhaust valves
• Valve seats
• Cylinder heads
• Pistons and cylinder liners
• Connecting rods
• Bearings
• Turbocharger components
• Water pumps
• Oil pumps
• Complete gasket sets

Wärtsilä engines are widely used as auxiliary generating sets and as power sources for diesel-electric or gas-electric propulsion.

Generator applications include:

• Main shipboard electrical power
• Emergency power
• Hotel loads
• Cruise-ship electrical systems
• Offshore drilling equipment
• Cargo-handling equipment
• Dynamic-positioning systems
• Pumps and compressors
• Refrigeration systems
• Hybrid propulsion systems

Marine generator-set engine families include:

• Wärtsilä 20
• Wärtsilä 20DF
• Wärtsilä 25
• Wärtsilä 25DF
• Wärtsilä 26
• Wärtsilä 31
• Wärtsilä 31DF
• Wärtsilä 32
• Wärtsilä 34DF
• Wärtsilä 46
• Wärtsilä 46F

Wärtsilä publishes dedicated marine genset specifications across diesel and dual-fuel engine platforms.

Wärtsilä also supplies supporting systems for:

• LNG
• Methanol
• Ammonia
• Conventional marine fuels
• Biofuels

Its current marine fuel-supply portfolio includes dedicated systems for LNG, methanol, and ammonia.

Wärtsilä NOx Reducer systems are available for newbuild and retrofit applications and are designed for current and future marine fuels.

Related spare-parts categories include:

• Fuel-supply pumps
• Fuel valves
• Double-wall piping components
• Gas-valve units
• Fuel-pressure sensors
• Safety valves
• Control modules
• SCR catalyst elements
• Urea-dosing components
• Exhaust-temperature sensors
• NOx sensors
• Seals and gaskets

Routine Maintenance Parts

• Lubricating-oil filters
• Fuel-oil filters
• Duplex filter elements
• Air filters
• Crankcase ventilation filters
• Centrifugal filter components
• Automatic backflush-filter components
• Thermostats
• Seals
• Gaskets
• O-rings
• Service kits

Fuel-Injection Parts

• Complete fuel injectors
• Injector nozzles
• Injector needles
• Pilot-fuel injectors
• Injection pumps
• Fuel-pump elements
• Delivery valves
• Common-rail pumps
• Common-rail pipes
• Fuel-pressure regulators
• Fuel-pressure sensors
• Fuel-control valves

Dual-Fuel and Gas-System Parts

• Gas-admission valves
• Pilot-fuel equipment
• Gas-valve units
• Gas-pressure regulators
• Gas-system sensors
• Actuators
• Ignition components
• Safety valves
• Methanol fuel components
• Ammonia fuel components
• Compatible seals and gaskets

Cylinder-Head and Valve Parts

• Complete cylinder heads
• Cylinder-head castings
• Exhaust valves
• Inlet valves
• Valve spindles
• Valve seats
• Valve guides
• Valve springs
• Valve rotators
• Rocker arms
• Hydraulic tools
• Cylinder-head gaskets

Engine Overhaul Parts

• Pistons
• Piston crowns
• Piston skirts
• Piston rings
• Piston pins
• Cylinder liners
• Anti-polishing rings
• Connecting rods
• Connecting-rod bolts
• Main bearings
• Connecting-rod bearings
• Thrust bearings
• Camshafts
• Crankshafts
• Tappets
• Complete gasket sets

Turbocharger and Air-System Parts

• Complete turbochargers
• Turbocharger cartridges
• Rotor assemblies
• Compressor wheels
• Turbine blades
• Nozzle rings
• Bearing kits
• Diffusers
• Air filters
• Charge-air coolers
• Turbocharger oil pumps
• Turbocharger gaskets

Cooling-System Parts

• Freshwater pumps
• Seawater pumps
• Cooling-water pump repair kits
• Impellers
• Thermostatic valves
• Plate heat-exchanger parts
• Charge-air cooler components
• Expansion-tank parts
• Cooling-water pipes
• Seals and O-rings

Lubrication-System Parts

• Lubricating-oil pumps
• Pre-lubricating pumps
• Oil-filter elements
• Automatic filter components
• Oil-cooler parts
• Pressure-regulating valves
• Oil-mist detector parts
• Oil-pressure sensors
• Lubrication pipes
• Crankshaft seals

Electrical and Automation Parts

• Engine-control modules
• Wärtsilä automation components
• Wiring harnesses
• Speed sensors
• Temperature sensors
• Pressure sensors
• Knock sensors
• Actuators
• Solenoid valves
• Control panels
• Relays
• Safety-system components

Exhaust and Emissions Parts

• Exhaust manifolds
• Expansion joints
• Exhaust valves
• Exhaust-temperature sensors
• SCR components
• Urea-dosing components
• NOx sensors
• Catalyst elements
• Silencers
• Insulation components

Frequently requested Wärtsilä service and repair products include:

• Fuel injectors
• Injector nozzles
• Fuel-pump elements
• Delivery valves
• Pilot-fuel injectors
• Gas-admission valves
• Exhaust valves
• Valve seats
• Cylinder-head gaskets
• Piston rings
• Cylinder liners
• Main bearings
• Connecting-rod bearings
• Turbocharger bearing kits
• Water-pump repair kits
• Lubricating-oil pump components
• Automatic filter elements
• Sensors
• Gasket and seal kits

Wärtsilä engines are commonly installed in:

• Cruise ships
• Passenger ferries
• RoPax vessels
• LNG carriers
• LNG bunker vessels
• Offshore-support vessels
• Platform-supply vessels
• Anchor-handling vessels
• Drilling vessels
• Fishing vessels
• Factory trawlers
• Tugboats
• Icebreakers
• Research vessels
• Naval vessels
• Cargo ships
• Short-sea vessels
• Dredgers
• Cable-laying vessels
• Hybrid-powered vessels
• Diesel-electric ships
• Gas-electric ships

Alfa Marine Spare Parts ships Wärtsilä marine engine components to vessel operators, fleet managers, shipyards, repair companies, and engine workshops worldwide.

The companies below are included as geographical and industry references. Their inclusion does not imply that Alfa Marine Spare Parts is authorized by, affiliated with, or an official supplier to these organizations.

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 regions include:

• Florida
• Louisiana
• Texas
• California
• Washington
• Virginia
• Maine
• Massachusetts
• Alaska
• Gulf of Mexico

United Kingdom

Major UK shipbuilding and repair centres 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 maritime regions include:

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

Dubai and the United Arab Emirates

Major UAE shipyards and marine-service facilities include:

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

Important marine hubs include:

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

Brazil

Major Brazilian shipbuilding and repair facilities include:

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

Important Brazilian maritime centres include:

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

Finland

Finland is Wärtsilä’s home market and an important centre for marine-engine technology, ship design, ice-class vessels, ferries, and lifecycle services.

Important Finnish shipyards and maritime centres include:

• Meyer Turku
• Rauma Marine Constructions
• Helsinki Shipyard
• Turku Repair Yard
• Western Shipyard
• Helsinki
• Turku
• Vaasa
• Rauma

Norway

Major Norwegian shipyards and maritime centres include:

• Vard
• Ulstein Verft
• Myklebust Verft
• Green Yard Kleven
• Larsnes Mek Verksted
• Bergen
• Ålesund
• Stavanger
• Haugesund
• Kristiansand

Netherlands

Major Dutch shipyards include:

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

Important maritime centres 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

South Korea

Major South Korean shipbuilding groups include:

• HD Hyundai Heavy Industries
• HD Hyundai Mipo
• HD Hyundai Samho
• Hanwha Ocean
• Samsung Heavy Industries
• HJ Shipbuilding & Construction

Japan

Major Japanese shipbuilding groups include:

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

Singapore

Important Singapore shipbuilding and repair centres include:

• Seatrium
• PaxOcean
• Strategic Marine
• Penguin Shipyard
• ST Engineering Marine
• Tuas
• Jurong
• Sembawang

Increased Output for the Wärtsilä 25 Ammonia Engine

In April 2026, Wärtsilä announced higher power ratings for its Wärtsilä 25 Ammonia engine. The upgrade increased output to 315 kW per cylinder at 900 rpm and 345 kW per cylinder at 1,000 rpm.

Wärtsilä 25 Ammonia Selected for New Cargo Vessel

In January 2026, Wärtsilä announced that its ammonia-engine solution had been selected for a new Skarv Shipping cargo vessel. Equipment delivery was scheduled to begin during the fourth quarter of 2026.

Wärtsilä 31 Selected for New Vessels

In January 2026, Wärtsilä announced that Wärtsilä 31 engines had been selected for an Allseas fleet-expansion vessel and a new Hartman Seatrade vessel. The company highlighted fuel efficiency and future conversion possibilities as important reasons for the selections.

Expanded Methanol Engine Portfolio

Wärtsilä has introduced a broader methanol-engine portfolio, with several platforms scheduled for delivery availability from 2025 onward.

Its methanol engines are designed to provide flexibility between conventional liquid fuels, biofuels, and green methanol.

Future-Fuel Supply Systems

Wärtsilä continues to develop integrated marine fuel-supply solutions for LNG, methanol, and ammonia, allowing the fuel system and engine package to be designed together.

Alfa Marine Spare Parts exports Wärtsilä marine engine components to customers in:

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

Customers choose Alfa Marine Spare Parts for:

• Genuine Wärtsilä marine-engine parts
• OEM-quality replacement components
• Selected aftermarket alternatives
• Support for current and legacy engines
• Diesel and dual-fuel engine components
• Methanol and alternative-fuel engine parts
• Marine generator parts
• Technical parts identification
• Assistance with superseded part numbers
• Worldwide export experience
• Competitive quotations
• Fast delivery to ports and shipyards
• Routine service parts
• Complete overhaul components

Wärtsilä engines are produced in numerous cylinder configurations, duty ratings, fuel versions, emissions standards, and propulsion or generator arrangements.

Two engines carrying the same basic family number may use different components because of:

• Complete engine designation
• Engine serial number
• Cylinder configuration
• Inline or V arrangement
• Diesel, gas, or dual-fuel configuration
• Methanol or ammonia capability
• Rated speed
• Power rating
• Emissions specification
• Turbocharger arrangement
• Propulsion or generator application
• Control-system generation
• Vessel installation

Before ordering, customers should provide:

• Complete Wärtsilä engine model
• Engine serial number
• Existing Wärtsilä part number
• Installation or equipment number
• Engine data-plate photograph
• Propulsion or generator application
• Fuel type
• Cylinder number
• Rated speed
• Turbocharger model
• Photographs of the existing component
• Required quantity
• Delivery destination

Looking for Wärtsilä 20, 22, 25, 26, 31, 32, 34DF, 38, 46, 46F, 46TS-DF, Vasa, or Sulzer engine parts?

Send Alfa Marine Spare Parts your:

• Complete engine model
• Engine serial number
• Required part numbers
• Product descriptions
• Vessel or generator application
• Fuel type
• Quantities
• Photographs
• Delivery country and port

We supply genuine, OEM-quality, and selected aftermarket Wärtsilä marine components for scheduled maintenance, emergency repairs, propulsion engines, auxiliary generators, and complete engine overhauls.

Alfa Marine Spare Parts – Your Worldwide Supplier of Wärtsilä Marine Engine Spare Parts.

Do you supply Wärtsilä marine engine parts?

Yes. Alfa Marine Spare Parts supplies genuine, OEM-quality, and selected aftermarket components for Wärtsilä propulsion, auxiliary, generator, diesel, gas, and dual-fuel engines.

Which Wärtsilä engine families do you support?

We supply selected components for engines including:

• Wärtsilä 20
• Wärtsilä 22
• Wärtsilä 25
• Wärtsilä 26
• Wärtsilä 31
• Wärtsilä 32
• Wärtsilä 34DF
• Wärtsilä 38
• Wärtsilä 46
• Wärtsilä 46F
• Wärtsilä 46TS-DF
• Wärtsilä Vasa engines
• Selected Sulzer engine families

Availability depends on the complete engine model, serial number, and required component.

Do you supply Wärtsilä dual-fuel engine parts?

Yes. We can supply selected pilot-fuel, gas-admission, injector, cylinder-head, turbocharger, sensor, sealing, cooling, and automation components for Wärtsilä dual-fuel engines.

Do you supply Wärtsilä 32 marine parts?

Yes. We can source selected injectors, fuel-pump components, cylinder heads, exhaust valves, pistons, liners, bearings, pumps, gaskets, and overhaul parts for Wärtsilä 32 and Vasa 32 engines.

Do you supply Wärtsilä 34DF parts?

Yes. We supply selected fuel-system, gas-system, pilot-fuel, cylinder-head, turbocharger, cooling, sensor, and overhaul parts for Wärtsilä 34DF engines.

Do you supply parts for older Wärtsilä and Sulzer engines?

Yes. We support many legacy Wärtsilä, Vasa, and Sulzer engine families, subject to model identification and parts availability.

Can you identify parts using the Wärtsilä engine serial number?

Yes. Customers should send the complete engine model, serial number, existing part number, installation number, data-plate photograph, and vessel application.

Do you ship Wärtsilä marine parts worldwide?

Yes. We arrange international shipping to shipowners, vessel managers, shipyards, ports, offshore operators, marine workshops, and engine-service companies worldwide.

Can you supply complete Wärtsilä overhaul parts?

Depending on the engine model, we can source pistons, liners, rings, bearings, cylinder-head parts, exhaust valves, gasket sets, pumps, fuel-system parts, and related overhaul components.