Designed with vessel efficiency and environmental friendliness in mind

EEDI regulations, low vessel emissions, and operational flexibility have been key considerations in designing the X72-B as the preferred engine for new merchant vessels. The new engine offers high levels of propulsion efficiency resulting from its lower engine revolutions. The wide rating field presents increased flexibility for selecting the most efficient propeller speed, thus giving minimised daily fuel consumption, by using the appropriate propeller diameter for the projected ship design and mission profile. For vessels with draught restrictions affecting the propeller diameter, a higher propeller speed can be selected. This, together with the favourable piston dismantling height, makes this engine very attractive for Suezmax tankers, Capesize bulk carriers, as well as Panamax and Sub-Panamax container vessels.

This low-speed marine diesel engine with 720mm cylinder bore is available in 5- up to 8-cylinder configuration, covering a power range from 10,600 to 31,360kW at 66 to 89rpm.


WinGD’s well proven electronically-controlled common-rail technology plays a key role in enabling ship owners to reduce fuel costs, mainly through the flexibility of the fuel injection and exhaust valve operations. This flexibility results in lower fuel consumption across the entire operating range, especially at low and part loads. In addition, different engine tunings (Standard, Delta, Delta By-Pass and Low Load) are available in order to meet specific customer requirements. Intelligent Combustion Control (ICC) system enables further fuel savings and balanced working of each cylinder.

The engine is fully compliant with IMO Tier III NOx emission levels when equipped with a SCR catalyst system. The introduction of the EEDI index also puts an emphasis on CO2 emissions and total vessel efficiency. The X72’s internal engine and propulsion efficiencies, and the possibility to apply various Power Take-Off (PTO) arrangements for on-board electricity production, makes it easier for shipyards to meet these new requirements. Waste Heat Recovery (WHR) offers further possibilities for maximising energy efficiency and for reducing emissions.


All areas of lifecycle costs have been taken into account for the X72-B. The selected stroke-to-bore ratio makes the engine compact and has a positive impact on the manufacturing and component cost. The X72-B is designed for exceptional reliability and for long periods of maintenance-free operation. It also allows extended Time Between Overhaul (TBO) of the critical components, to as much as 5 years. The service-friendly design will reduce downtime, maintain vessel operation, and cut operating costs. Together with Condition Based Maintenance (CBM) and service agreements, the overhaul interval could be even further extended, thus minimising maintenance costs and maximising the revenue-earning capability of the vessel.


All Generation X engines can be converted to use LNG as fuel. For simplifying the future conversion WinGD has introduced the DF-ready version as an option. The DF-ready engines can be easily converted to dual-fuel, as no major structural components need to be modified. All parts, which are to be replaced at a later conversion, are either typical wear parts or specific X-DF components and systems. DF-ready version is the recommended solution for LNG-ready ships.

All data provided on this site is for information purposes only, explicitly non-binding and subject to changes without further notice.

Basic Engine Data

Technical Information

WinGD X72-B

IMO Tier II/Tier III (SCR)
Cylinder bore
Piston stroke
Mean effective pressure at R1
21.0 bar

Rated power, principal dimensions and weights

Output in kw at
84rpm66rpmLength A (mm)Weight (tonnes)
Output in kw at
Cyl.Length A (mm)Weight (tonnes)
Dimensions in mm
B C D E E*
4780 1575 10790 4710
F1 F2 F3 G
13655 13655 12730 2455

Brake specific fuel consumption (bsfc) in g/kWh

Full load, Rating point R1 R2 R3 R4
BMEP, bar 21.0 15.4 21.0 15.4
BSFC Standard Tuning 166.8 159.3 166.8 159.3
Part load, % of R1 85 70 85 70 65
Tuning variant Standard Standard Delta Delta Low-load
BSFC 163.2 162.8 162.5 161.3 157.3
Full load, Rating point
BMEP, bar
R1 R1 R3 R4
21.0 15.4 21.0 15.4
Standard Tuning
R1 R1 R3 R4
166.8 159.3 166.8 159.3
Part load, % of R1
Tuning variant
85 70 85 70 65
Standard Standard Delta Delta Low-load
85 70 85 70 65
163.2 162.8 162.5 161.3 157.3


Marine installation manual

Marine Installation Manual (MIM)

Modified 02 November 2018

Installation instructions & concept guidance

Complete Package - coventional engines

Published 10 October 2019

DG9710 - Engine Seating/Foundation Fitting Instruction

Modified 07 May 2018

DG9715 - Assembly Instruction WinGD Friction Type Stays

Modified 28 May 2018

DG9715 - Assembly Instruction WinGD Single Acting Hydraulic Type Stays

Modified 07 May 2018

DG9721 - Concept Guidance for Fresh Water Generation

Modified 07 May 2018

DG9722 - Flushing Instruction for Lubricating Oil System

Modified 07 May 2018

DG9723 - Concept Guidance Fuel Oil Treatment

Modified 07 May 2018

DG9723 - Concept Guidance for Operation on Distillate Fuels

Published 10 October 2019

DG9723 - Concept Guidance Fuel Oil System

Modified 12 September 2018

DG9726 - Concept Guidance for HP SCR Installation

Modified 07 May 2018

DG9730 - Recommended Fluid Flow Rates vs Velocities

Published 26 September 2019

DG9726 - Concept Guidance for HP SCR TC PROTECTION

Published 12 July 2019


Engine or Platform Outline Views

6 Cylinder Engine Execution

Published 29 May 2019

Marine Installation Drawing Set (MIDS)

DG9715 - Engine stays

Modified 19 September 2018

DG9710 - Engine Seating & Foundation

Published 10 April 2019

DG9710-01 - Tool Engine Alignment

Published 03 October 2019

DG9721 - Cooling Water system

Published 27 September 2019

DG9722 - Lubricating Oil system

Published 27 September 2019

DG9723 - Fuel Oil System

Modified 12 September 2018

DG9724 - Leakage Collection & Washing system

Modified 12 September 2018

DG9726 - Exhaust System

Published 18 September 2019

MIDS complete package

Published 03 October 2019

DG9725 - Starting Air System

Modified 12 September 2018


Coupling Flange Crankshaft - Propeller shaft

Modified 29 May 2018

Engine and System Dynamics


Coupled Axial Vibration Calculation

Published 12 June 2019

Torsional Vibration OD-Shaft

Published 12 June 2019

Torsional Vibration Calculation Marine Installation

Published 12 June 2019

Vibration Standards and Limits

Modified 24 June 2019

Whirling Vibration

Published 12 June 2019


Acceptable vibration levels and standard measurement points

Published 12 June 2019



Published 13 February 2019

Forces + Moments

Forces + Moments

Published 13 February 2019

Engine Alignment

Measurement Record Sheets

Record sheet for CWD+JUT measurements on the ship

Modified 23 September 2019

Instructions and Limits

Instructions and Limits - Documents Overview

Published 24 June 2019

Instruction Marine Propulsion

Published 24 June 2019

Guidelines for Layout Calculation

Published 03 June 2019

Guidelines for Alignment Process

Published 03 June 2019

Guidelines for Measurements

Published 03 June 2019

Operation & Maintenance

Fuel Lubricants Water

Validated Fluids for Engine Operation

Cooling Water and Additives for WinGD engines - V2

Published 04 January 2019

Diesel Fuels for WinGD engines - V2

Published 21 December 2018

Lubricants for WinGD engines - V3

Published 18 March 2019

WinGD_TIN011 IMO 2020 Operation Guideline

Published 20 May 2019

Technical Updates

Technical Information Note

WinGD_TIN001 Light_running_margin

Published 01 June 2015

WinGD_TIN003 Steam-production-control-(SPC)

Published 01 November 2015

WinGD_TIN006-1 Impact-back-pressure-EH-treatment-systems

Published 01 February 2019


Published 27 May 2019

WinGD_TIN011 IMO 2020 Operation Guideline

Published 20 May 2019

WinGD_TIN012 CPP 17 percentage limit

Published 12 September 2019

Who is WinGD

About WinGD

Headquartered in Switzerland, powering merchant shipping since 1893