Wartsila Engine Spare Parts
Wärtsilä marine engine specifications for diesel, dual-fuel, and methanol platforms. Review model ratings, key features, and source genuine Wärtsilä parts through Alfa Marine Spare Parts.
Wärtsilä 20 Methanol
Wärtsilä 20 Methanol
Wärtsilä 20 Methanol is state-of-the-art engine for auxiliary applications in multi-fuelled container ships, vehicle carriers operating on methanol, conventional LFO, and bio-LFO. These engines are available in 4L, 6L, 8L, 9L cylinder configurations offering a power out range of 0.8 and 1.8 MW at 1000 and 1200 rpm.
Key Features and Benefits
- Supreme functionality as auxiliary engines in fuel-flexible watercrafts compatible for methanol
- Up to 90% reduction in CO2 emissions, minimized sulphur particulate releases
- Efficient performance with a wide range of liquid fuels including biofuels
- Available in retrofit units engineered with decarbonization technology
- Integrated MethanolPac fuel supply system
Emission Standards Compliance
IMO Tier II / Tier III compliant with Wärtsilä NOx Reducer (NOR)
Engine Specifications
Max. cylinder output (kW)200Cylinder configurations4L, 6L, 8L, 9LBore (mm)200Stroke (mm)280Nominal speed (rpm)1 000 / 1 200Speed modeConstant
Wärtsilä 31 Methanol
Wärtsilä 31 Methanol
Wärtsilä 31 Methanol has a proven track record of performance, reliability, and efficiency for methanol fuelled vessels. The engine features supreme operational and fuel flexibility while minimizing noise and waste emissions. The configuration supports diverse applications deployed in ferries, luxury leisure cruise ships, etc.
Wärtsilä 31 Methanol engine is available in 8V, 10V, 12V, 14V, 16V cylinder configurations. These engines offer the power output range 4.7 and 9.8 MW at 720 and 750 rpm.
Key Features and Benefits
- Supreme functionality as auxiliary engines in fuel-flexible watercrafts compatible for methanol
- Up to 90% reduction in CO2 emissions, minimized sulphur particulate releases
- Efficient performance with a wide range of liquid fuels including biofuels
- Available in retrofit units engineered with decarbonization technology
- Integrated MethanolPac fuel supply system
Emission Standards Compliance
IMO Tier II / Tier III compliant with Wärtsilä NOx Reducer (NOR)
Engine Specifications
Max. cylinder output (kW)590 / 610Cylinder configurations8V, 10V, 12V, 14V, 16VBore (mm)310Stroke (mm)430Nominal speed (rpm)720 / 750Speed modeConstant/Variable
Wärtsilä 32 Methanol
Wärtsilä 32 Methanol
The introduction of Wärtsilä 32 Methanol engine and Wärtsilä MethanolPac storage and supply system in 2022 offered the first ever methanol-fuelled powering solution to the marine industry. These engines feature 3.4 and 5.2 MW power output range at 720 and 750 rpm.
Wärtsilä 32 Methanol engines can operate seamlessly on methanol alongside HFO, MDO and liquid biofuels. The product has acquired certification of approval from all leading classification societies. The engine models are available in configurations for new installation and retrofitting.
Key Features and Benefits
- Supreme functionality as auxiliary engines in fuel-flexible watercrafts compatible for methanol
- Up to 90% reduction in CO2 emissions, minimized sulphur particulate releases
- Efficient performance with a wide range of liquid fuels including biofuels
- Available in retrofit units engineered with decarbonization technology
- Integrated MethanolPac fuel supply system
Emission Standards Compliance
IMO Tier II / Tier III compliant with Wärtsilä NOx Reducer (NOR)
Engine Specifications
Mean effective pressure28.9 barMax. cylinder output (kW)560 / 580Cylinder configurations6L, 7L, 8L, 9LCylinder Bore (mm)320Piston Stroke (mm)400Nominal speed (rpm)720 / 750Speed modeConstant/Variable
Engine Rated Power
Engine typePower Rating in Kw6L323 4807L324 0608L324 6409L325 220
Engine Dimensions (mm) and weights (tonnes)
Engine typeA* mmA mmB* mmB mmC mmD mmF mmWeight tonnes6L325 5705 1302 4322 2952 3802 3451 155357L32N/A5 745N/A2 3302 3802 3451 155388L326 4006 3792 4572 3752 6102 3451 155449L326 8856 8692 4552 3752 6102 3451 15549
Wärtsilä 46F Methanol
Wärtsilä 46F Methanol
Wärtsilä 46F Methanol engine is a reliable powering solution for heavy-duty applications in large cruise ships and merchant vessels. The four-stroke technology engine operates on sustainable fuels. It is proven track record of minimising vibrations, noise, and greenhouse gas emissions.
The mechanism supports decarbonisation and multi-fuel functionality allowing supreme flexibility to choose between methanol and conventional fuels. Wärtsilä 46F Methanol engines are available in both inline and V cylinder configurations. These engines offer the power output range of 7.5 and 20 MW at 600 rpm.
Key Features and Benefits
- Supreme functionality as auxiliary engines in fuel-flexible watercrafts compatible for methanol
- Up to 90% reduction in CO2 emissions, minimized sulphur particulate releases
- Efficient performance with a wide range of liquid fuels including biofuels
- Available in retrofit units engineered with decarbonization technology
- Integrated MethanolPac fuel supply system
Emission Standards Compliance
IMO Tier II / Tier III compliant with Wärtsilä NOx Reducer (NOR)
Engine Specifications
Max. cylinder output (kW)1 250Cylinder configurations6L, 7L, 8L, 9L, 12V, 14V, 16VBore (mm)460Stroke (mm)580Nominal speed (rpm)600Speed modeConstant/Variable
Wärtsilä 46TS Methanol
Wärtsilä 46TS Methanol
The Wärtsilä 46TS Methanol engine boasts futuristic two-stage turbocharging system. It is a revolutionary product of Wärtsilä’s large bore methanol engines portfolio, designed to unrivalled levels of performance, efficiency, and power density. Wärtsilä 46TS Methanol is available in both inline and V cylinder configurations. These engines deliver an incredible power output range of 8.1 and 21.6 MW at 600 rpm.
Key Features and Benefits
- Supreme functionality as auxiliary engines in fuel-flexible watercrafts compatible for methanol
- Up to 90% reduction in CO2 emissions, minimized sulphur particulate releases
- Efficient performance with a wide range of liquid fuels including biofuels
- Available in retrofit units engineered with decarbonization technology
- Integrated MethanolPac fuel supply system
Emission Standards Compliance
IMO Tier II / Tier III compliant with Wärtsilä NOx Reducer (NOR)
Engine Specifications
Max. cylinder output (kW)1 350Cylinder configurations6L, 7L, 8L, 9L, 12V, 14V, 16VBore (mm)460Stroke (mm)580Nominal speed (rpm)600Speed modeConstant/Variable
Wartsila Engine 1 20DF Dual Fuel Engine
Wartsila Engine 1 - 20DF Dual Fuel Engine
The Wärtsilä 20DF four-stroke dual-fuel engine can operate on natural gas, marine diesel oil (MDO) or heavy fuel oil (HFO). The engine mechanism facilitates seamless switch across gas to MDO/HFO and vice versa during operation without causing power interruption.
The supreme fuel flexible Wärtsilä 20DF is suitable for installation and optimisation for constant speed generator sets in larger vessels. It can also be used as main engine for inducing mechanical and electric propulsion.
Applications: Wärtsilä 20DF is a compact and lightweight model perfectly suited for producing mechanical drive prime mover for small cargo vessels, ferries, or tug boats.
Key Features and Benefits
- Fuel and application flexible
- Proven and reliable dual-fuel technology
- Extended time between overhauls
- Low sensitivity to varying fuel quality
- Low exhaust gas emissions
- Low gas feed pressure
- Embedded automation system for safe and optimised operation
Maritime Environmental Compliance Certifications
The Wärtsilä 20DF features lean burn principle. It features a cylinder containing gas and air mixture (usually more air than required for complete combustion). The lean combustion technology minimizes NOX emissions by reducing the peak temperatures. The configuration offers operation optimization alternatives:
- IMO Tier III compliant in gas mode (without using secondary gas exhaust purification systems)
- Dual fuel mechanism optimises SOX and CO2 emissions and regulates smoke-free operation in gas mode.
- IMO Tier II exhaust emissions regulations compliant in liquid fuel oil mode
- Can comply IMO Tier III standards when paired with Wärtsilä NOX Reducer (NOR) exhaust treatment solution
Engine Specifications
20DF DUAL FUEL ENGINEIMO TIER IIICylinder bore200 mmFuel OilPiston stroke280 mm700 cSt/50°C, 7200 sR1/100°FCylinder output160/195 kW/cyISO 8217, category ISO-FDMX, DMA and DMBSpeed1000/1200 rpmMean effective pressure22.0, 22.2 barBSEC 8100 kJ/kWh, BSGC 7900 kJ/kWhPiston speed9.3, 11.2 m/sGenerator voltage0.4–13.8 kVGenerator efficiency0.95–0.96
Power Ratings
Engine Type60Hz50Hz195 kW/cyl, 1200 rpm160 kW/cyl, 1000 rpmEngine kWGen. kWEngine kWGen. kW6L20DF1 1701 1239609208L20DF1 5601 4981 2801 2309L20DF1 7551 6851 4401 380
Genset Dimensions (mm) and Weight (tonnes)
Engine typeA*EI*KL*Weight6L20DF5 3252 0701 025/1 0751 8002 73116.98L20DF6 0302 0701 075/1 1251 8002 78120.89L20DF6 5352 3001 8001 8002 83123.9
Engine Dimensions (mm) and Weight (tonnes)
Engine typeA*ABCDFWeight6L20DF3 2543 1081 7051 6901 8006249.48L20DF3 9733 7831 7051 8241 80062411.19L20DF4 2614 0761 7051 8241 80062411.7
Wartsila Engine 2 Wartsila 25DF
Wartsila Engine 2 - Wartsila 25DF
The Wärtsilä 25 medium-speed 4-stroke marine engine model is based on the time-honoured Wärtsilä 31 modular technology platform. These engines are available in 6–9L cylinder configurations, offering 1.7 to 3.4 MW power output range. Wärtsilä 25 engines boast outstanding fuel flexibility and high-end performance, operating on diesel, dual-fuel LNG and ammonia versions.
Key Features
Technical Features and Benefits
- Common rail fuel injection – This cutting-edge injection system induces high-pressure fuel injection for optimised combustion, allowing fuel-injection settings at all loads for smokeless operation.
- Boasts incredible performance on LNG operation (min. MN 70)
- Variable valve timing – features on-off type inlet and exhaust valve timing (stepless) for optimising the engine for each specific application
- Fuel gas system – The fuel gas system in Wärtsilä 25DF runs on the same parts used in the successful Wärtsilä 31DF. This ensures validation and chances of procuring OEM spare parts easily.
- High quality pressure-balanced gas valves for optimal accuracy
- The port injection system triggers rapid response for flexibility of operation and dynamic load control.
- W25DF facilitates operational accuracy at reduced costs with ammonia and LNG
- Two stage turbocharging offers enhanced power output per cylinder while boosting efficiency and reducing harmful emissions.
- Advanced combustion technology
Emission Standards
IMO Tier III, IMO Tier II w/o SCR
Technical Specifications
BSEC*7560 kJ/kWh (gas mode)SFOC*190.6 (diesel mode)Fuel typeDiesel, LNGGas fuel specificationNatural gas, Biogas, min. methane number 70Fuel specificationISO 8217, fuel grades ISO-F DMX, DMA, DFA, DMZ, DFZ. Biodiesel (FAME, HVO)Fuel oil viscosity (cSt/40ºC)6Cylinder bore/Piston stroke250 mm / 340 mmEngine speed900 / 1000 rpmCylinder output315 / 345 kw/cylPiston speed10.2 / 11.3 m/s
Engine Dimensions (mm) and Weight (tons)
Engine6L25DF7L25DF8L25DF9L25DFA4 9805 3805 7806 300B2 1202 1202 1202 120C99099010901090D2 4902 4902 4902 600Weight23.225.327.8TBA
Genset Dimensions (mm) and Weight (tons)
Engine6L25DF7L25DF8L25DF9L25DFA7 9608 6209 1309 900B2 7202 7202 7202 720C1 3601 3601 3601 360D2 4902 4902 4902 600Weight39.644.848.8TBA
Wartsila Engine 3 Wartsila 31DF
Wartsila Engine 3 - Wartsila 31DF
W31DF medium-speed 4-stroke marine engines are available in 8–16-cylinder configurations, offering 4.6MW - 10.4MW power output range operating at variable 720 and 750 rpm. These benchmark engines have emerged as a futuristic solution for ferries, fishing vessels, offshore supply vessels, semi-submersible vessels, ice-going ships, and pleasure crafts.
W31DF, available in pure gas and dual fuel models, offers diverse flexibility catering vivid marine applications. It can be installed as the main propulsion engine in vessels operating on diesel, electric, and hybrid systems. The mechanism also offers settings to run along a propeller curve or at constant a constant speed, can be used as an auxiliary engine.
Key Features
Key Features and Benefits
- Record-breaking performance and efficiency
- Low fuel consumption over a wide operating range
- Outstanding cylinder power (up to 650 kW/cylinder)
- Flexible fuel options – diesel, dual fuel (DF) and pure gas (SG) versions
- Compliant with IMO Tier 3 regulations (on gas mode or with an SCR when using diesel fuel)
- Ultra-low emissions when running on dual fuel engines
Emission Standards Compliance
IMO Tier III IMO Tier II in diesel w/o SCR
Technical Specifications
BSEC*(kJ/kWh) 7350 (gas mode)SFOC*(g/kWh) 176.5 (diesel mode)Gas fuel specificationNatural gas Methane number 74Fuel specificationFuel oil. ISO 8217 category ISO-FRMK 700 ISO-FDMA, ISO-F-DMB, ISO-F-DMZ, ULSFFuel oil viscosity (cSt/50 °C)700Cylinder bore310 mmPiston stroke430 mmEngine speed720 / 750 rpmCylinder output580 / 600 kW/cylMean effective pressure29.8 / 29.6 barPiston speed10.3 / 10.8 m/sAdditional featuresEnviroPac, Smart Heat Recovery, ArcticPac
Engine Dimensions (mm) and Weights (tonnes)
Engine TypeAA*BCFWeight8V31DF6121641732513127149657.910V31DF6761705732513127149666.112V31DF7688783331443460154677.814V31DF8328847331443460164685.716V31DF8968911331443460164693.2
Wartsila Engine 4 Wartsila 34DF
Wartsila Engine 4 - Wartsila 34DF
Wärtsilä 34DF medium-speed 4-stroke marine engine offers umpteen marine powering solutions across diverse applications. It performs best on anything from reliable performance as constant speed generator set in main engine to running as an auxiliary engine in the multi-fuel compatible propelling system.
W35DF has emerged as key support for main marine engines in offshore support vessels, tugs, small LNG carriers, and more. The dual fuel mode allows vessels to operate seamlessly on conventional liquid marine fuels such as LFO, HFO, biofuel or LNG. These engines are available in varying cylinder configurations from 6 – 16 cylinders, offering an output of up to 500kW per cylinder (when in use as main engine). These engines run at variable 720 and 750 rpm speeds when used as genset for auxiliary applications.
Key Features
Key Features and Benefits
- Fully fuel-flexible functionality – operates on LNG, HFO, and biofuel
- Optional fuel sharing (up to 100% operation on gas mode)
- High efficiency and optimised power output for auxiliary applications
- Reliable and safe advanced combustion control and low gas pressure
- Ultra-low emissions with optional greenhouse gas (GHG) reduction package
Emission Standards Compliance
IMO Tier III or EPA T3
ISO 8217, category ISO-F-DMX, DMA and DMB
Technical Specifications – Main Engine
Cylinder bore340 mmPiston stroke400 mmCylinder output480, 500 kW/cylSpeed720, 750 rpmMean effective pressure20.0 barPiston speed9.6, 10.0 m/sGenerator efficiency0.95–0.97Fuel SpecificationsFuel oilBSEC7590 kj/kWh
Engine Type60 Hz50 Hz480 kW/cyl, 720 rpm500 kW/cyl, 750 rpm6L34DF288030008L34DF384040009L34DF4320450012V34DF5760600016V34DF76808000
Engine Dimensions (mm) and Weights (tonnes)
Engine typeABCDFWeight6L34DF53522423238923451153358L34DF63052423255523451153459L34DF679624232609234511534912V34DF678024652900212012106116V34DF7900246529002120121077
Technical Specifications – Auxiliary Applications
Cylinder bore340 mmPiston stroke400 mmCylinder output480, 500, 520 kW/cylSpeed720, 750 rpmMean effective pressure22.0 bar (standard version), 23.9 bar (power-up version)Piston speed9.6, 10.0 m/sGenerator voltage0.4–13.8 kVGenerator efficiency0.95–0.97Fuel SpecificationsFuel oilBSEC7464 kJ/kWh (standard version), 7616 kJ/kWh (power-up version)
Auxiliary Engine - Power Ratings
Engine Type60 Hz50 Hz60 Hz (power-up version)50 Hz (power-up version)480 kW/cyl, 720 rpm500 kW/cyl, 750 rpm520 kW/cyl, 720 rpm520 kW/cyl, 750 rpm6L34DF28803000312031208L34DF38404000416041609L34DF432045004680468012V34DF57606000N/AN/A16V34DF76808000N/AN/A
Genset Dimensions (mm) and Weights (tonnes)
Engine typeA*E*I*KL*Weight6L34DF91002720145023453873608L34DF102002720163023454053759L34DF1080029201630234540538012V34DF10500339017002120416510016V34DF115003390185021204315125
Wartsila Engine 5 Wartsila 46DF
Wartsila Engine 5 - Wartsila 46DF
The Wärtsilä 46DF four-stroke dual-fuel engine is an excellent powering solution widely used in LNG Carriers, Cruise ships, RO-RO/PAX, Ferries, and Large Offshore Units. The engine model operates and switches seamlessly on heavy fuel oil (HFO), marine diesel oil (MDO) and natural gas.
This advanced module is based on the Wärtsilä 46F and Wärtsilä 50DF (both recognized for proven track record and power performance). Hence, availing spare parts for W46DF is easy and cost-effective than overall replacement. The Wärtsilä 46DF offers power range from 6.8 MW to 18.3 MW when running at 600 rpm.
The compact design, fuel flexibility, and effortless switching across fuel modes makes it a perfect solution for a wide range of marine applications. From optimized constant speed diesel electric operation to direct drive main engine propulsion, the engine serves diverse needs in the heavy-duty vessels.
Key Features
Key Features and Benefits
- Lowest gas fuel and fuel oil consumption in the marine industry
- Most robust 4-stroke gas engine on the market
- Proven fuel flexibility and dual-fuel technology
- Long overhaul intervals
- Low gas feed pressure and exhaust gas emissions
- Embedded automation system
Emission Standards Compliance
IMO Tier III Compliant
Technical Specifications
Cylinder bore460 mmPiston stroke580 mmCylinder output1145 kW/cylSpeed600 rpmMean effective pressure23.8 barPiston speed11.6 m/sFuel specificationFuel oilBSEC7530 kJ/kWh @85%MCRBSGC7485 kJ/kWh @85%MCR
Engine Rated Power
Engine typePower Ratings in kW6L46DF6 8707L46DF8 0158L46DF9 1609L46DF10 30512V46DF13 74014V46DF16 03016V46DF18 320
Engine Dimensions (mm) and Weights (tonnes)
Engine typeAA*BCFWeight6L46DF8 9538 6703 2553 1851 4301027L46DF9 7739 6353 2553 1851 4301188L46DF10 59010 3103 4453 1851 4301309L46DF11 41311 1303 4453 1851 43014612V46DF10 35011 1203 6704 5551 62018414V46DF11 40012 1703 6704 5551 62022316V46DF12 70013 4503 8605 1741 620235
Wartsila Engine 6 Wartsila 46TS DF
Wartsila Engine 6 - Wartsila 46TS-DF
The Wärtsilä 46TS-DF is the revolutionary medium-speed engine engineered for best-in-class fuel economy, emissions performance, and unbeatable fuel flexibility.
This engine is the ideal solution to cut fuel costs and emissions.
The Wärtsilä 46TS-DF addresses a broad range of marine applications and vessel types.
It can be configured as the main propulsion engine in diesel-electric, mechanical, and hybrid installations. The engine can be optimised to run at constant speed or along a propeller curve. It offers the best solution cruise and ferry operators to minimise fuel costs while maximising sustainable performance. Wärtsilä 46TS can be configured as a main engine for onboard medium in merchant vessels, massive gas tankers, bulk carriers, container vessels, dredgers, etc.
Key Features
Key Features and Benefits
- High power density (1,300 kW / cylinder)
- Proven and reliable dual-fuel technology
- Low operational expenses thanks to improved efficiency and heat recovery
- Reduced maintenance thanks to 10% fewer cylinders
- High-performance two-stage turbocharging and fuel injection
Emission Standard Compliance
IMO Tier III compliant in gas and diesel modes when combined with SCR
Engine Specifications
Cylinder bore460 mmPiston stroke580 mm (700 cSt/50°C) (7200sR1/100°F)Cylinder output1300 kW/cySpeed600 rpmMean effective pressure27 barPiston speed11.6 m/sFuel specificationFuel oil (ISO 8217, category ISO-F-DMX. DMA. DMB Natural Gas)Engine efficiencyup to 52%
Engine Rated Power
Engine typePower Ratings in kW6L46TS78007L46TS91008L46TS104009L46TS1170012V46TS1560014V46TS1820016V46TS20800
Dimensions (mm) and Weights (tonnes)
Engine typeA mmA* mmB* mmF mmC mmWeight tWartsila 6L46TS90939798423713653754117Wartsila 7L46TS991310618423713653754129Wartsila 8L46TS1061511427435513653935142Wartsila 9L46TS1147511550435513653935155Wartsila 12V46TS11066-390315055060196Wartsila 14V46TS12116-390315055060218Wartsila 16V46TS13456-436315055733252