MTU 12 V 2000 M50B User Manual (English)

Questions and Answers:

E
edeckerAug 16, 2025
What to do if my MTU Engine does not turn when starter is actuated?
- M
  Megan SchmidtAug 16, 2025
  If your MTU Engine doesn't turn when the starter is activated, several issues could be the cause. The battery may be discharged or faulty, in which case you should charge or replace it. Check if cable connections are properly secured. Starting-air pressure might not be available, so check the connections and the main valve of the compressed-air system. Other potential causes include a blocked running gear, a missing or defective limit switch, or faulty wiring. For engine wiring or starter issues or problems with starting-air pressure, it is best to contact service.
A
Anthony LevineAug 19, 2025
Why my MTU 12 V 2000 M50B Engine turns but does not fire?
- M
  Matthew SullivanAug 20, 2025
  If your MTU Engine turns over but doesn't ignite, it could be due to a discharged or faulty battery, so charge or replace the battery. Another potential reason is air in the fuel system, which requires venting. For other issues, it is best to contact service.
K
Kaitlyn MorganAug 22, 2025
How to troubleshoot if MTU Engine does not reach rated speed?
- N
  natalie63Aug 22, 2025
  If your MTU Engine isn't reaching its rated speed, it could be due to several reasons. First, ensure the fuel inlet is completely open. Other potential causes include a clogged fuel prefilter, a clogged fuel filter, or a clogged air filter, so replace them accordingly. Also, the injector or injection pump may be faulty. In such cases, replacement might be needed. For other issues or if the engine is overloaded, it is best to contact service.
K
karen91Aug 26, 2025
Why my MTU Engine produces black exhaust gas?
- P
  Paul HansonAug 26, 2025
  Black exhaust gas from your MTU Engine can be caused by a few things. The air filter might be clogged. Alternatively, the injector or injection pump could be faulty. Overloading the engine can also cause this issue. For the injector or injection pump issues or overloading, it is best to contact service.
M
Matthew BradleyAug 28, 2025
What to do if the MTU 12 V 2000 M50B speed is not steady?
- P
  Patricia BarnettAug 28, 2025
  If your MTU Engine speed is unstable, it could be due to a faulty injector or injection pump. Another possibility is air in the fuel system, which requires venting. For other issues, it is best to contact service.
R
Ronald MolinaAug 31, 2025
What to do if MTU 12 V 2000 M50B fires unevenly?
- N
  nelsonkevinSep 1, 2025
  If your MTU Engine is firing unevenly, the injector or injection pump might be faulty. Additionally, air in the fuel system could be the cause, requiring you to vent the system. For other issues, it is best to contact service.
N
Nancy CoxSep 3, 2025
Why is the charge-air temperature too high in my MTU Engine?
- J
  Jon NelsonSep 3, 2025
  A high charge-air temperature in your MTU Engine can stem from several causes. The engine coolant treatment may be incorrect, so check it using the MTU test kit. The air-intake temperature could also be too high, so check the fans. Also, check the air inlet/outlet ducts. For contaminated components, it is best to contact service.
S
Sarah Hamilton DVMSep 6, 2025
What causes blue exhaust gas from my MTU 12 V 2000 M50B?
- J
  Jerry BrooksSep 6, 2025
  Blue exhaust gas from your MTU Engine can be due to several reasons. The engine oil level might be too high, so drain some oil. The oil separator or oil-preseparator of the crankcase breather could be clogged and need replacement. For other issues, it is best to contact service.
M
mary91Sep 9, 2025
What to do if the charge-air pressure is too low in MTU 12 V 2000 M50B?
- K
  Keith HouseSep 9, 2025
  If the charge-air pressure in your MTU Engine is too low, the air filter might be clogged, so check the contamination indicator. For contaminated components or other issues, it is best to contact service.
C
Christopher ScottSep 12, 2025
Why my MTU 12 V 2000 M50B produces white exhaust gas?
- J
  Joel ClarkSep 13, 2025
  White exhaust gas from your MTU Engine can occur for several reasons. The engine might not be at its operating temperature, so run it until it warms up. There could also be water in the fuel, so check the fuel system at the fuel prefilter. Leaking can also cause this issue. For other issues, it is best to contact service.

MTU 12 V 2000 M50B Specifications

General

Brand	MTU
Model	12 V 2000 M50B
Category	Engine
Language	English

Summary

Safety

General conditions

General safety requirements and correct use of the engine.

Personnel and organizational requirements

Requirements for qualified personnel and organizational measures for safe operation.

Transportation

Guidelines for safely transporting the engine.

Safety regulations for startup and operation

Safety precautions before and during engine startup and operation.

Safety regulations for maintenance and repair work

Safety rules for performing maintenance and repair tasks on the engine.

Auxiliary materials, fire prevention and environmental protection

Guidelines for handling materials, fire prevention, and environmental protection.

Conventions for safety instructions in the text

Explanation of safety symbols and warnings used in the manual.

General Information

Engine side and cylinder designations

Designation of engine sides and cylinders.

Product description

Overview of the engine's components and systems.

Engine overview 2000 M50-M61A/B

Diagram showing functional groups of the engine.

Sensors, actuators and injectors – Overview

Identification of key sensors, actuators, and injectors on engine views.

Technical Data

8V 2000 M50A engine data: Engine-mounted heat exchanger, reference condition: Intake-air temperature 25 °C

Technical specifications for the 8V 2000 M50A engine with engine-mounted heat exchanger.

8V 2000 M50A engine data: Remote heat exchanger, reference condition: Intake-air temperature 25 °C

Technical data for 8V 2000 M50A engine with remote heat exchanger.

8V 2000 M50B engine data: Engine-mounted heat exchanger, reference condition: Intake-air temperature 25 °C

Technical specifications for the 8V 2000 M50B engine with engine-mounted heat exchanger.

8V 2000 M50B engine data: Remote heat exchanger, reference condition: Intake-air temperature 25 °C

Technical data for 8V 2000 M50B engine with remote heat exchanger.

Engine data 8V 2000M51A, engine-mounted heat exchanger

Technical specifications for the 8V 2000 M51A engine with engine-mounted heat exchanger.

8V 2000 M51A engine data: Remote heat exchanger

Technical data for 8V 2000 M51A engine with remote heat exchanger.

Engine data 8V 2000M51B, engine-mounted heat exchanger

Technical specifications for the 8V 2000 M51B engine with engine-mounted heat exchanger.

8V 2000 M51B engine data: Remote heat exchanger

Technical data for 8V 2000 M51B engine with remote heat exchanger.

12V 2000 M50A engine data: Engine-mounted heat exchanger, reference condition: Intake-air temperature 25 °C

Technical specs for 12V 2000 M50A engine, engine-mounted heat exchanger, 25°C.

12V 2000 M50A engine data: Remote heat exchanger, reference condition: Intake-air temperature 25 °C

Technical data for 12V 2000 M50A engine, remote heat exchanger, 25°C.

12V 2000 M50A engine data: Engine-mounted heat exchanger, reference condition: Intake-air temperature 45 °C

Technical specs for 12V 2000 M50A engine, engine-mounted heat exchanger, 45°C.

12V 2000 M50A engine data: Remote heat exchanger, reference condition: Intake air temperature 45 °C

Technical data for 12V 2000 M50A engine, remote heat exchanger, 45°C.

12V 2000 M50B engine data: Engine-mounted heat exchanger, reference condition: Intake-air temperature 25 °C

Technical specs for 12V 2000 M50B engine, engine-mounted heat exchanger, 25°C.

12V 2000 M50B engine data: Remote heat exchanger, reference condition: Intake-air temperature 25 °C

Technical data for 12V 2000 M50B engine, remote heat exchanger, 25°C.

12V 2000 M50B engine data: Engine-mounted heat exchanger, reference condition: Intake-air temperature 45 °C

Technical specs for 12V 2000 M50B engine, engine-mounted heat exchanger, 45°C.

12V 2000 M50B engine data: Remote heat exchanger, reference condition: Intake-air temperature 45 °C

Technical data for 12V 2000 M50B engine, remote heat exchanger, 45°C.

Engine data 12V 2000 M51A, engine-mounted heat exchanger

Technical specifications for the 12V 2000 M51A engine with engine-mounted heat exchanger.

12V 2000 M51A engine data: Remote heat exchanger

Technical data for 12V 2000 M51A engine with remote heat exchanger.

Engine data 12V 2000M51B, engine-mounted heat exchanger

Technical specifications for the 12V 2000 M51B engine with engine-mounted heat exchanger.

12V 2000 M51B engine data: Remote heat exchanger

Technical data for 12V 2000 M51B engine with remote heat exchanger.

16V 2000 M50A engine data: Engine-mounted heat exchanger, reference condition: Intake-air temperature 25 °C

Technical specs for 16V 2000 M50A engine, engine-mounted heat exchanger, 25°C.

16V 2000 M50A engine data: Remote heat exchanger, reference condition: Intake-air temperature 25 °C

Technical data for 16V 2000 M50A engine, remote heat exchanger, 25°C.

16V 2000 M50A engine data: Engine-mounted heat exchanger, reference condition: Intake-air temperature 45 °C

Technical specs for 16V 2000 M50A engine, engine-mounted heat exchanger, 45°C.

16V 2000 M50A engine data: Remote heat exchanger, reference condition: Intake-air temperature 45 °C

Technical data for 16V 2000 M50A engine, remote heat exchanger, 45°C.

16V 2000 M50B engine data: Engine-mounted heat exchanger, reference condition: Intake-air temperature 25 °C

Technical specs for 16V 2000 M50B engine, engine-mounted heat exchanger, 25°C.

16V 2000 M50B engine data: Remote heat exchanger, reference condition: Intake-air temperature 25 °C

Technical data for 16V 2000 M50B engine, remote heat exchanger, 25°C.

16V 2000 M50B engine data: Engine-mounted heat exchanger, reference condition: Intake-air temperature 45 °C

Technical specs for 16V 2000 M50B engine, engine-mounted heat exchanger, 45°C.

16V 2000 M50B engine data: Remote heat exchanger, reference condition: Intake-air temperature 45 °C

Technical data for 16V 2000 M50B engine, remote heat exchanger, 45°C.

Engine data 16V 2000M51A, engine-mounted heat exchanger

Technical specifications for the 16V 2000 M51A engine with engine-mounted heat exchanger.

16V 2000 M51A engine data: Remote heat exchanger

Technical data for 16V 2000 M51A engine with remote heat exchanger.

Engine data 16V 2000M51B, engine-mounted heat exchanger

Technical specifications for the 16V 2000 M51B engine with engine-mounted heat exchanger.

16V 2000 M51B engine data: Remote heat exchanger

Technical data for 16V 2000 M51B engine with remote heat exchanger.

Firing order

Cylinder firing order for different engine configurations.

Engine – Main dimensions

Physical dimensions (length, width, height) of various engine models.

Operation

Putting the engine into operation (out-of-service period > 3 months)

Procedure for starting an engine after a long period of inactivity.

Putting the engine into operation after scheduled out-of-service period

Steps to put the engine into operation after a scheduled downtime.

Operational checks

Essential checks to perform on the engine during operation.

LOP – Controls

Overview of the Local Operating Panel (LOP) controls and their functions.

Starting the engine from LOP

Procedure for starting the engine using the Local Operating Panel.

Stopping the engine from LOP (without Blue Line automation system)

Procedure for stopping the engine via LOP without automation.

Emergency stop from LOP

How to perform an emergency engine stop using the Local Operating Panel.

After stopping the engine

Actions to take after the engine has been stopped.

Plant – Cleaning

Procedures and safety precautions for cleaning the plant.

Maintenance

Maintenance task reference table [QL1]

Reference table for maintenance tasks and their associated measures.

Maintenance task reference table [QL1]

Continuation of the maintenance task reference table.

Troubleshooting

Common engine issues and their causes/measures when the starter is actuated.

LOP fault messages

Interpretation of fault messages displayed on the Local Operating Panel (LOP).

Task Description

SOLAS

Information related to SOLAS (Safety Of Life At Sea) requirements.

SOLAS shielding as per MTN 5233 – Installation

Installation procedure for SOLAS shielding per MTN 5233.

SOLAS shielding – Installation as per MTN 5233

Alternative description for SOLAS shielding installation.

SOLAS shielding – Installation

SOLAS shielding for oil and fuel filters.

Installation locations for SOLAS shielding

Visual guide to SOLAS shielding installation points on the engine.

Engine

Engine related tasks.

Engine – Barring manually

Manual procedure for barring the engine.

Engine cranking on starter

Procedure for starting the engine using the starter motor.

Cylinder Liner

Cylinder liner related tasks.

Cylinder liner – Endoscopic examination

Method for performing an endoscopic inspection of cylinder liners.

Cylinder liner – Instructions and comments on endoscopic and visual examination

Guidance on interpreting findings from cylinder liner examinations.

Crankcase Breather

Crankcase breather related tasks.

Crankcase ventilation – Oil separator element replacement, diaphragm check and replacement

Replacing the oil separator element and checking the diaphragm.

Crankcase breather – Cleaning oil separator element

Cleaning the oil separator element of the crankcase breather.

Valve Drive

Valve drive related tasks.

Valve clearance – Check and adjustment

Procedure for checking and adjusting valve clearance.

Cylinder head cover – Removal and installation

Steps for removing and installing the cylinder head cover.

Injection Pump / HP Pump

Injection pump related tasks.

Injection pump – Replacement

Procedure for replacing the injection pump.

Injection pump – Removal and installation

Detailed steps for removing and installing the injection pump.

Injection Valve / Injector

Injector related tasks.

Injector – Replacement

Procedure for replacing the injector.

HP fuel line – Pressure pipe neck replacement

Replacing the pressure pipe neck of the HP fuel line.

Injector – Removal and installation

Detailed steps for removing and installing the injector.

Fuel System

Fuel system related tasks.

HP fuel line – Pressure pipe neck replacement

Replacing the pressure pipe neck of the HP fuel line.

Fuel – Draining

Procedure for draining the fuel system.

Fuel system – Venting

Steps for venting the fuel system.

Fuel Filter

Fuel filter related tasks.

Fuel filter – Replacement

Procedure for replacing the fuel filter.

Fuel prefilter – Differential pressure check and adjustment of gauge

Checking and adjusting the fuel prefilter differential pressure gauge.

Fuel prefilter – Draining

Procedure for draining the fuel prefilter.

Fuel prefilter – Flushing

Method for flushing the fuel prefilter.

Fuel prefilter – Filter element replacement

Replacing the filter element of the fuel prefilter.

Charge-Air Cooling General, Left-Hand Side

Charge-air cooling system description.

Intercooler – Checking condensate drain line for coolant discharge and obstruction

Checking the intercooler condensate drain line for issues.

Air Filter

Air filter related tasks.

Air filter – Replacement

Procedure for replacing the air filter.

Air filter – Removal and installation

Steps for removing and installing the air filter.

Air Intake

Air intake related tasks.

Contamination indicator – Signal ring position check

Checking the signal ring position of the air filter contamination indicator.

Starting Equipment

Starting equipment related tasks.

Starter – Condition check

Checking the condition of the starter.

Lube Oil System, Lube Oil Circuit

Lube oil system and circuit related tasks.

Engine oil – Level check

Procedure for checking the engine oil level.

Engine oil – Change

Steps for changing the engine oil.

Oil Filtration / Cooling

Oil filtration and cooling system related tasks.

Oil dipstick – Marking

Procedure for marking the oil dipstick.

Engine oil filter – Replacement

Procedure for replacing the engine oil filter.

Centrifugal oil filter – Cleaning and filter-sleeve replacement

Cleaning the centrifugal oil filter and replacing the filter sleeve.

Coolant Circuit, General, High-Temperature Circuit

Coolant circuit and high-temperature circuit tasks.

Drain and venting points

Locations for draining and venting the coolant circuit.

Engine coolant – Level check

Procedure for checking the engine coolant level.

Engine coolant – Change

Procedure for changing the engine coolant.

Engine coolant – Draining

Steps for draining the engine coolant.

Engine coolant – Filling

Procedure for filling the engine coolant.

HT coolant pump – Relief bore check

Checking the relief bore on the HT coolant pump.

Engine coolant – Sample extraction and analysis

Procedure for extracting and analyzing engine coolant samples.

Raw Water Pump with Connections

Raw water pump and connections tasks.

Raw water pump – Relief bore check

Checking the relief bore on the raw water pump.

Belt Drive

Belt drive related tasks.

Drive belt – Condition check

Procedure for checking the condition of the drive belt.

Battery-Charging Generator

Battery-charging generator related tasks.

Battery-charging generator drive – Drive belt check and adjustment

Checking and adjusting the drive belt for the battery-charging generator.

Battery-charging generator drive – Drive belt replacement

Procedure for replacing the drive belt for the battery-charging generator.

Engine Mounting / Support

Engine mounting and support tasks.

Engine mounting – Checking condition of resilient mounts

Checking the condition of engine mounting resilient mounts.

Wiring (General) for Engine/Gearbox/Unit

General wiring information for engine, gearbox, and unit.

Engine wiring – Check

Procedure for checking engine wiring.

Accessories for (Electronic) Engine Governor / Control System

Accessories for electronic engine governor and control systems.

Engine governor and connectors – Cleaning

Cleaning the engine governor and its connectors.

Engine monitoring unit and connectors – Cleaning

Cleaning the engine monitoring unit and its connectors.

Start interlock limit switch – Check

Checking the start interlock limit switch.

ECU – Checking plug connections

Checking plug connections on the Engine Control Unit (ECU).

Engine monitoring unit – Plug connection check

Checking plug connections on the Engine Monitoring Unit (EMU).

Engine control unit – Removal and installation

Procedure for removing and installing the engine control unit.

Emergency Instrumentation (Local Operating Panel)

Emergency instrumentation via Local Operating Panel (LOP).

LOP and connectors – Cleaning

Cleaning the Local Operating Panel (LOP) and its connectors.

LOP – Visual inspection

Performing a visual inspection of the LOP.

LOP – Test procedures

Test procedures for the Local Operating Panel (LOP).

Appendix A

Abbreviations

List of abbreviations used in the manual.

MTU contacts/service partners

Contact information for MTU service and support.

Appendix B

Special Tools

List of special tools required for maintenance and repair.

Related product manuals

MTU Detroit Diesel 12 V 2000 P62

208 pages

MTU 12 V 2000 M50B User Manual

Table of Contents

Questions and Answers:

MTU 12 V 2000 M50B Specifications

Summary

Safety

General conditions

Personnel and organizational requirements

Transportation

Safety regulations for startup and operation

Safety regulations for maintenance and repair work

Auxiliary materials, fire prevention and environmental protection

Conventions for safety instructions in the text

General Information

Engine side and cylinder designations

Product description

Engine overview 2000 M50-M61A/B

Sensors, actuators and injectors – Overview

Technical Data

8V 2000 M50A engine data: Engine-mounted heat exchanger, reference condition: Intake-air temperature 25 °C

8V 2000 M50A engine data: Remote heat exchanger, reference condition: Intake-air temperature 25 °C

8V 2000 M50B engine data: Engine-mounted heat exchanger, reference condition: Intake-air temperature 25 °C

8V 2000 M50B engine data: Remote heat exchanger, reference condition: Intake-air temperature 25 °C

Engine data 8V 2000M51A, engine-mounted heat exchanger

8V 2000 M51A engine data: Remote heat exchanger

Engine data 8V 2000M51B, engine-mounted heat exchanger

8V 2000 M51B engine data: Remote heat exchanger

12V 2000 M50A engine data: Engine-mounted heat exchanger, reference condition: Intake-air temperature 25 °C

12V 2000 M50A engine data: Remote heat exchanger, reference condition: Intake-air temperature 25 °C

12V 2000 M50A engine data: Engine-mounted heat exchanger, reference condition: Intake-air temperature 45 °C

12V 2000 M50A engine data: Remote heat exchanger, reference condition: Intake air temperature 45 °C

12V 2000 M50B engine data: Engine-mounted heat exchanger, reference condition: Intake-air temperature 25 °C

12V 2000 M50B engine data: Remote heat exchanger, reference condition: Intake-air temperature 25 °C

12V 2000 M50B engine data: Engine-mounted heat exchanger, reference condition: Intake-air temperature 45 °C

12V 2000 M50B engine data: Remote heat exchanger, reference condition: Intake-air temperature 45 °C

Engine data 12V 2000 M51A, engine-mounted heat exchanger

12V 2000 M51A engine data: Remote heat exchanger

Engine data 12V 2000M51B, engine-mounted heat exchanger

12V 2000 M51B engine data: Remote heat exchanger

16V 2000 M50A engine data: Engine-mounted heat exchanger, reference condition: Intake-air temperature 25 °C

16V 2000 M50A engine data: Remote heat exchanger, reference condition: Intake-air temperature 25 °C

16V 2000 M50A engine data: Engine-mounted heat exchanger, reference condition: Intake-air temperature 45 °C

16V 2000 M50A engine data: Remote heat exchanger, reference condition: Intake-air temperature 45 °C

16V 2000 M50B engine data: Engine-mounted heat exchanger, reference condition: Intake-air temperature 25 °C

16V 2000 M50B engine data: Remote heat exchanger, reference condition: Intake-air temperature 25 °C

16V 2000 M50B engine data: Engine-mounted heat exchanger, reference condition: Intake-air temperature 45 °C

16V 2000 M50B engine data: Remote heat exchanger, reference condition: Intake-air temperature 45 °C

Engine data 16V 2000M51A, engine-mounted heat exchanger

16V 2000 M51A engine data: Remote heat exchanger

Engine data 16V 2000M51B, engine-mounted heat exchanger

16V 2000 M51B engine data: Remote heat exchanger

Firing order

Engine – Main dimensions

Operation

Putting the engine into operation (out-of-service period > 3 months)

Putting the engine into operation after scheduled out-of-service period

Operational checks

LOP – Controls

Starting the engine from LOP

Stopping the engine from LOP (without Blue Line automation system)

Emergency stop from LOP

After stopping the engine

Plant – Cleaning

Maintenance

Maintenance task reference table [QL1]

Maintenance task reference table [QL1]

Troubleshooting

Troubleshooting

LOP fault messages

Task Description

SOLAS

SOLAS shielding as per MTN 5233 – Installation

SOLAS shielding – Installation as per MTN 5233

SOLAS shielding – Installation

Installation locations for SOLAS shielding

Engine

Engine – Barring manually

Engine cranking on starter

Cylinder Liner

Cylinder liner – Endoscopic examination