Cummins QSB6.7 Marine Engine Parts

The Cummins QSB6.7 Marine Engine is a compact, electronically controlled inline six-cylinder diesel from the Cummins QSB family. Built around an approximately 6.7-liter displacement, the QSB6.7 combines turbocharging, charge-air cooling, electronic fuel management and high-pressure fuel injection for marine propulsion and auxiliary applications.

The QSB6.7 is used across a broad range of vessels where compact dimensions, strong power-to-weight performance and electronic engine management are important.

Typical marine applications can include:

Commercial Workboats
Patrol Boats
Pilot Boats
Crew Boats
Fishing Vessels
Passenger Vessels
Small Ferries
Rescue Boats
Pleasure Craft
Yachts
Marine Auxiliary Installations

As these engines accumulate operating hours, correct spare-parts identification becomes increasingly important.

A QSB6.7 currently in service may already have undergone:

Fuel Injector Replacement
High-Pressure Fuel-System Repairs
Turbocharger Replacement
Charge-Air Cooler Repairs
Freshwater Pump Replacement
Marine Seawater Pump Replacement
Heat Exchanger Repairs
Oil Cooler Repairs
Cylinder Head Repairs
Piston and Ring Replacement
Bearing Replacement
Sensor Replacement
Wiring-Harness Repairs
Starter Motor Replacement
Alternator Replacement
Electronic Control Repairs
Partial or Complete Engine Overhaul

Because of this history, ordering a component simply as a “Cummins QSB6.7 part” may not always provide enough information.

For accurate identification, useful information includes:

Exact Engine Model
Engine Serial Number
Engine Identification Plate
Existing Cummins Part Number
Component Manufacturer Number Where Applicable
Part Description
Quantity Required
Clear Photographs
Vessel Application

Alfa Marine Spare Parts supports Cummins QSB6.7 Marine Engine Spare Parts requirements for routine maintenance, repair and major engine overhaul.

Depending on availability, supply options can include:

Genuine Cummins Parts
OEM-Quality Components
Selected Aftermarket Parts
Remanufactured Components
Maintenance Parts
Repair Components
Overhaul Parts

What Is the Cummins QSB6.7 Marine Engine?

The Cummins QSB6.7 is an inline six-cylinder, four-stroke diesel engine with approximately 6.7 liters displacement.

Unlike older mechanically controlled Cummins engines, the QSB6.7 relies heavily on electronic engine management and high-pressure fuel injection.

Major engine systems can include:

Cylinder Block
Cylinder Head
Pistons
Piston Rings
Piston Pins
Connecting Rods
Crankshaft
Main Bearings
Connecting Rod Bearings
Camshaft
Valve-Train Components
High-Pressure Fuel System
Fuel Injectors
Fuel Rail Components
Turbocharger
Charge-Air Cooling Components
Air Intake System
Exhaust System
Freshwater Cooling System
Lubrication System
Electronic Sensors
Engine Wiring Harness
Engine Control Components
Starter Motor
Alternator

Depending on the marine installation, additional equipment can include:

Marine Seawater Pump
Heat Exchanger
Oil Cooler
Raw-Water Pipework
Marine Exhaust Components
Cooling Hoses
Vessel-Specific Accessories

Cummins QSB6.7 Technical Information

Exact specifications can vary according to engine rating, marine configuration and application.

Technical InformationCummins QSB6.7ManufacturerCumminsEngine FamilyQSBCommon Marine ModelQSB6.7Cylinder ArrangementInline 6-CylinderEngine CycleFour-Stroke DieselDisplacementApprox. 6.7 LitersBoreApprox. 107 mmStrokeApprox. 124 mmAspirationTurbochargedCharge-Air SystemCharge-Air Cooled / AftercooledFuel ControlElectronicFuel InjectionHigh-Pressure Common-Rail TypeFuelDieselCoolingLiquid CooledLubricationPressure LubricationApplicationMarine Propulsion / Auxiliary

Exact marine horsepower, rated rpm, emissions configuration, turbocharger specification, electronic control arrangement and cooling equipment should always be confirmed from the individual engine identification.

What Does Cummins QSB6.7 Mean?

The model designation identifies the engine family and approximate displacement.

QSB → Cummins QSB Engine Family

6.7 → Approximately 6.7 Liters Displacement

This is important because the QSB6.7 should not automatically be treated as interchangeable with earlier QSB configurations such as the QSB5.9.

Is the Cummins QSB6.7 the Same as the QSB5.9?

No.

Although both engines belong to the wider QSB family, they have different displacement and component configurations.

Differences can affect:

Fuel Injectors
High-Pressure Fuel-System Components
Fuel Rail Components
Turbocharger
Charge-Air Cooling Components
Cylinder Head
Pistons
Connecting Rods
Crankshaft
Cooling-System Components
Gaskets
Sensors
Electronic Components
Marine Accessories

Always identify the exact engine model before ordering parts.

Why Is Correct Cummins QSB6.7 Parts Identification Important?

Imagine two vessels operating QSB6.7 engines.

The first engine may still be relatively close to its original configuration.

The second may already have undergone:

Fuel Injector Replacement
High-Pressure Fuel Pump Repair
Turbocharger Replacement
Charge-Air Cooler Repair
Cylinder Head Repair
Freshwater Pump Replacement
Marine Seawater Pump Replacement
Heat Exchanger Repair
Sensor Replacement
Wiring-Harness Repair
Starter Motor Replacement
Alternator Replacement
Internal Engine Overhaul

Both engines may still be described as Cummins QSB6.7, but that does not automatically mean every currently installed component is identical.

Useful identification information includes:

Complete Engine Model
Engine Serial Number
Engine Identification Plate
Existing Part Number
Component Manufacturer Number
Casting Number Where Available
Electrical Connector Details Where Applicable
Clear Photographs

Why Is the Cummins Engine Serial Number Important?

The QSB6.7 model identifies the engine family.

The Engine Serial Number — ESN — helps identify the individual engine more precisely.

This becomes especially important when sourcing:

Fuel Injectors
High-Pressure Fuel Components
Fuel Rail Components
Turbocharger
Electronic Sensors
Engine Control Components
Freshwater Pump
Marine Seawater Pump
Cylinder Head Components
Pistons
Bearings
Starter Motor
Alternator

For parts identification, a strong starting combination is:

Engine Model + Engine Serial Number + Existing Part Number

What Cummins QSB6.7 Marine Engine Spare Parts Are Available?

Depending on configuration and availability, requirements can range from routine maintenance components to complete engine-overhaul parts.

Cummins QSB6.7 Fuel-System Parts

Potential requirements can include:

Fuel Injectors
Injector Components
High-Pressure Fuel Pump Components
Fuel Rail Components
Fuel Pressure Sensors
Fuel Pressure Control Components
Fuel Supply Components
Fuel Transfer Components
Fuel Filters
Fuel-Water Separator Elements
High-Pressure Fuel Lines
Fuel Return Components
Injector Seals
O-Rings
Gaskets

What Are Signs of a Possible QSB6.7 Fuel-System Problem?

Possible symptoms can include:

Difficult Starting
Extended Cranking
Rough Running
Uneven Cylinder Performance
Reduced Engine Power
Poor Acceleration
Increased Exhaust Smoke
Increased Fuel Consumption
Engine Fault Codes
Engine Derating

These symptoms do not automatically confirm injector or fuel-pump failure.

Similar symptoms can also result from:

Restricted Fuel Filters
Contaminated Fuel
Low Fuel Supply Pressure
Air Entering the Fuel System
Fuel Pressure Sensor Problems
Electrical Problems
Turbocharger Problems
Charge-Air Leakage
Low Compression

Diagnosis should therefore come before replacement.

Cummins QSB6.7 Fuel Injectors

Potential requirements can include:

Complete Fuel Injectors
Injector Seals
Injector Connections
Injector Hardware
Related Fuel Components

One Cylinder Is Running Differently — Should All Six Injectors Be Replaced?

Not automatically.

If one cylinder behaves differently from the other five, investigate that cylinder first.

Possible areas include:

Injector Performance
Injector Electrical Connection
Fuel Delivery
Cylinder Compression
Intake Valve Condition
Exhaust Valve Condition
Wiring Condition
Piston Condition
Piston Ring Condition
Cylinder Condition

Replacing all six injectors will not correct a mechanical or electrical problem affecting one cylinder.

Why Is Fuel Cleanliness Important on the QSB6.7?

The QSB6.7 uses precision high-pressure fuel-system components.

Contaminated fuel can contribute to:

Injector Wear
High-Pressure Pump Damage
Fuel Rail Problems
Pressure-Control Problems
Restricted Filters
Poor Starting
Reduced Engine Performance
Expensive Fuel-System Repairs

Clean fuel handling and good filtration are therefore particularly important.

Cummins QSB6.7 High-Pressure Fuel-System Parts

Potential requirements can include:

High-Pressure Fuel Pump Components
Fuel Rail Components
Fuel Pressure Sensors
Pressure-Control Components
High-Pressure Fuel Lines
Fuel Injectors
Fuel Supply Components
Seals
O-Rings
Associated Hardware

Does a Fuel-Pressure Fault Mean the High-Pressure Pump Is Bad?

Not automatically.

Possible causes can include:

Restricted Fuel Filters
Low Fuel Supply
Air Entering the Fuel System
Contaminated Fuel
Injector Leakage
Fuel Pressure Sensor Problems
Pressure-Control Problems
Wiring Problems
Electrical Supply Problems
High-Pressure Pump Wear

The complete fuel system should be diagnosed before an expensive pump is replaced.

Why Should High-Pressure Fuel Components Be Handled Carefully?

High-pressure diesel fuel equipment uses precision components and requires very clean servicing conditions.

Before opening the system:

Clean the Surrounding Area
Protect Open Connections
Prevent Dirt Entry
Keep Replacement Components Clean
Use Correct Component Identification
Follow Proper Workshop Procedures

Contamination introduced during repair can shorten component life.

Cummins QSB6.7 Turbocharger Parts

Potential requirements can include:

Complete Turbocharger
Turbocharger Cartridge
Compressor Components
Turbine Components
Bearings
Seals
Oil Supply Components
Oil Drain Components
Intake Connections
Exhaust Connections
Turbocharger Gaskets
Mounting Hardware

The Cummins QSB6.7 Has Lost Power — Is the Turbocharger Bad?

Possibly, but not necessarily.

Reduced power can also result from:

Restricted Air Filter
Intake Restriction
Intake Leakage
Charge-Air Leakage
Charge-Air Cooler Restriction
Exhaust Leakage
Exhaust Restriction
Restricted Fuel Filters
Fuel-Pressure Problems
Injector Problems
Sensor Problems
Electronic Derating
Low Compression
Excessive Vessel Load
Propeller Problems

A replacement turbocharger cannot correct a fuel-pressure problem, electronic derating or charge-air leak.

What Are Signs of Possible QSB6.7 Turbocharger Problems?

Possible symptoms can include:

Reduced Engine Power
Slow Acceleration
Black Exhaust Smoke
Reduced Boost
Abnormal Turbocharger Noise
Oil Leakage
Increased Oil Consumption
Higher Exhaust Temperature

The turbocharger should be considered together with the intake, charge-air, fuel and exhaust systems.

Why Can a Replacement Turbocharger Fail Again?

Turbocharger damage can result from another problem elsewhere in the engine.

Before installing a replacement, investigate:

Turbocharger Oil Supply
Turbocharger Oil Drain
Engine Oil Condition
Intake Restriction
Foreign-Object Damage
Exhaust Restriction
Excessive Exhaust Temperature

Correcting the original cause can help protect the replacement turbocharger.

Cummins QSB6.7 Charge-Air Cooling Parts

Potential requirements can include:

Charge-Air Cooler
Charge-Air Cooler Core
Housing Components
Air Pipes
Air Hoses
Cooling Connections
Clamps
Gaskets
O-Rings
Seals

Why Is Charge-Air Cooling Important?

The turbocharger compresses incoming air, which increases its temperature.

The charge-air cooling system helps reduce that temperature before the air reaches the cylinders.

Reduced cooling efficiency can contribute to:

Reduced Engine Power
Black Smoke
Poor Acceleration
Higher Intake-Air Temperature
Higher Exhaust Temperature
Increased Thermal Loading

Can Charge-Air Leakage Be Mistaken for Turbocharger Failure?

Yes.

The turbocharger may still be producing compressed air while part of that air escapes before reaching the cylinders.

Possible leakage points can include:

Damaged Hoses
Loose Clamps
Failed Gaskets
Cracked Pipes
Cooler Connections
Deteriorated Seals

Possible symptoms can include:

Reduced Boost
Reduced Power
Black Smoke
Slow Acceleration
Higher Exhaust Temperature

The complete charge-air path should therefore be inspected.

Cummins QSB6.7 Air Intake Parts

Potential requirements can include:

Air Filter Elements
Air Cleaner Components
Intake Pipes
Intake Hoses
Turbocharger Connections
Charge-Air Connections
Intake Manifold Components
Clamps
Gaskets
Seals

Why Can a Restricted Air Filter Cause Black Smoke?

The QSB6.7 requires an adequate supply of clean air.

Restricted airflow can contribute to:

Black Exhaust Smoke
Reduced Power
Poor Acceleration
Higher Exhaust Temperature
Increased Fuel Consumption

The complete intake system should therefore be checked during performance troubleshooting.

Cummins QSB6.7 Exhaust-System Parts

Potential requirements can include:

Exhaust Manifold Components
Turbocharger Exhaust Connections
Exhaust Elbows
Exhaust Gaskets
Sealing Components
Fasteners
Associated Hardware

Why Does an Exhaust Leak Before the Turbocharger Matter?

The turbocharger turbine depends on exhaust-gas energy.

If exhaust escapes before reaching the turbine, available turbine-driving energy can be reduced.

Possible signs can include:

Soot Around Exhaust Connections
Abnormal Exhaust Noise
Reduced Turbocharger Response
Reduced Engine Performance

Cummins QSB6.7 Marine Cooling-System Parts

Potential requirements can include:

Freshwater Pump
Thermostats
Thermostat Housing Components
Marine Seawater Pump
Heat Exchanger
Charge-Air Cooling Components
Oil Cooler
Cooling Pipes
Cooling Hoses
Gaskets
O-Rings
Seals

Why Can a Cummins QSB6.7 Marine Engine Overheat?

Possible causes can include:

Low Coolant Level
Deteriorated Coolant
Thermostat Problems
Freshwater-Pump Problems
Restricted Internal Cooling Passages
Heat Exchanger Restriction
Oil Cooler Restriction
Charge-Air Cooling Problems
Reduced Seawater Flow
Blocked Sea Strainer
Raw-Water Restrictions

Marine overheating should be investigated across the complete cooling system.

Why Does the QSB6.7 Overheat Mainly Under Load?

At light load, less heat needs to be removed.

When engine output increases, the cooling system must transfer substantially more heat.

A partially restricted cooling system may therefore appear normal at idle but begin running hotter during sustained vessel operation.

Possible areas to investigate include:

Freshwater Pump
Thermostats
Heat Exchanger
Oil Cooler
Charge-Air Cooling
Marine Seawater Pump
Sea Strainer
Raw-Water Pipework
Internal Cooling Passages

Cummins QSB6.7 Freshwater Pump Parts

Potential requirements can include:

Complete Freshwater Pump
Pump Housing
Pump Shaft
Bearings
Mechanical Seal
Impeller
Gaskets
O-Rings

Does a Bad QSB6.7 Freshwater Pump Always Leak?

No.

A freshwater pump can lose circulation efficiency without producing a large external coolant leak.

Possible problems can include:

Bearing Wear
Seal Deterioration
Impeller Damage
Internal Corrosion
Cavitation
Reduced Pumping Efficiency

Cummins QSB6.7 Marine Seawater Pump Parts

Depending on marine configuration, potential requirements can include:

Complete Seawater Pump
Pump Housing
Pump Shaft
Bearings
Mechanical Seal
Flexible Impeller Where Applicable
Wear Components
Cover Components
Gaskets
O-Rings

Are All Cummins QSB6.7 Seawater Pumps the Same?

No.

Marine cooling arrangements can differ according to:

Exact Engine Configuration
Engine Serial Number
Vessel Builder
Cooling-System Layout
Marine Installation
Previous Modification
Previous Pump Replacement

For accurate identification, provide:

Engine Serial Number
Pump Manufacturer
Pump Model
Existing Pump Number
Mounting Arrangement
Hose or Pipe Connections
Clear Photographs

What Can Cause Low QSB6.7 Seawater Flow?

Possible causes can include:

Restricted Sea Strainer
Blocked Seawater Intake
Damaged Flexible Impeller Where Applicable
Worn Seawater Pump
Air Entering the Raw-Water Circuit
Restricted Raw-Water Pipework
Heat Exchanger Restriction
Oil Cooler Restriction
Charge-Air Cooling Restriction
Impeller Debris

Reduced seawater flow may become most noticeable when engine temperature begins increasing under load.

What If the QSB6.7 Seawater Pump Impeller Has Missing Blades?

The missing fragments should be located where possible.

Impeller pieces can travel downstream and become trapped in:

Cooling Hoses
Pipe Connections
Heat Exchanger Inlets
Oil Cooler Passages
Charge-Air Cooler Passages
Other Raw-Water Restrictions

Replacing the damaged impeller alone may not restore full cooling flow if fragments remain trapped elsewhere.

Cummins QSB6.7 Heat Exchanger Parts

Potential requirements can include:

Complete Heat Exchanger
Heat Exchanger Core
Tube Bundle
Housing
End Covers
Cooling Connections
Gaskets
O-Rings
Seals

What Can Reduce QSB6.7 Heat Exchanger Performance?

Possible causes can include:

Salt Deposits
Scale
Sediment
Marine Growth
Corrosion Products
Impeller Debris
Restricted Seawater Flow

A partially restricted heat exchanger may provide adequate cooling at light load and become insufficient when engine output increases.

Cummins QSB6.7 Oil Cooler Parts

Potential requirements can include:

Complete Oil Cooler
Oil Cooler Core
Oil Cooler Housing
Oil Connections
Cooling Connections
Gaskets
O-Rings
Seals

Cummins QSB6.7 Lubrication-System Parts

Potential requirements can include:

Engine Oil Pump
Oil Pump Components
Engine Oil Filters
Oil Cooler Components
Oil Pressure Components
Oil Pressure Sensors
Oil Pipes
Gaskets
O-Rings
Front Crankshaft Seal
Rear Crankshaft Seal

Does Low Oil Pressure Mean the QSB6.7 Oil Pump Is Bad?

Not automatically.

Possible causes can include:

Low Oil Level
Incorrect Lubricating Oil
Deteriorated Oil
Restricted Oil Filter
Oil Pump Wear
Pressure-Regulating Problems
Excessive Bearing Clearance
Crankshaft Wear
Internal Engine Wear
Oil Pressure Sensor Problems
Wiring Problems

Actual mechanical oil pressure should be confirmed before expensive mechanical components are replaced.

Cummins QSB6.7 Cylinder Head Parts

Potential requirements can include:

Complete Cylinder Head
Cylinder Head Components
Cylinder Head Gasket
Intake Valves
Exhaust Valves
Valve Guides
Valve Seats
Valve Springs
Rocker Components
Valve-Train Components
Injector Sealing Components
Valve Cover Gasket

When Should QSB6.7 Cylinder Head Components Be Inspected?

Inspection may become necessary following:

Severe Overheating
Coolant Loss
Head-Gasket Failure
Low Compression
Valve Problems
Uneven Cylinder Performance
Abnormal Combustion
Major Engine Overhaul

Rebuild or Replace the QSB6.7 Cylinder Head?

That decision should follow inspection.

Important areas can include:

Cracking
Corrosion
Flatness
Sealing-Surface Condition
Intake Valve Condition
Exhaust Valve Condition
Valve Seats
Valve Guides
Previous Machining
Heat Damage

Serviceable components may be suitable for reconditioning.

Damaged or dimensionally unsuitable components may require replacement.

Cummins QSB6.7 Pistons and Piston Rings

Potential requirements can include:

Pistons
Piston Ring Sets
Piston Pins
Piston Pin Components
Retaining Components

What Are Possible Signs of QSB6.7 Piston or Ring Wear?

Possible symptoms can include:

Excessive Blow-By
Increased Oil Consumption
Reduced Compression
Difficult Starting
Exhaust Smoke
Reduced Engine Performance

Does Excessive Blow-By Mean the QSB6.7 Only Needs New Rings?

Not necessarily.

Possible causes can include:

Worn Piston Rings
Cylinder Wear
Piston Wear
Ring-Groove Wear
Internal Engine Damage

The piston and cylinder condition should be inspected and measured before deciding the final repair requirement.

Cummins QSB6.7 Connecting Rod Parts

Potential requirements can include:

Connecting Rods
Connecting Rod Bearings
Small-End Components
Connecting Rod Bolts
Associated Hardware

Connecting rods should receive careful inspection following:

Bearing Failure
Lubrication Failure
Piston Damage
Major Internal Engine Damage

Cummins QSB6.7 Crankshaft and Bearing Parts

Potential requirements can include:

Complete Crankshaft
Main Bearings
Connecting Rod Bearings
Thrust Components
Crankshaft Gear Components
Front Crankshaft Seal
Rear Crankshaft Seal

Why Should the QSB6.7 Crankshaft Be Measured During Overhaul?

A previously repaired engine may already have undergone crankshaft work.

The crankshaft may have been:

Polished
Repaired
Machined
Replaced

Inspection can include:

Main Journal Diameter
Connecting Rod Journal Diameter
Surface Condition
Scoring
Taper
Out-of-Round Condition
Heat Damage
Evidence of Previous Repair

Measure first. Select bearings second.

Cummins QSB6.7 Electronic Sensors and Electrical Parts

Electronic control makes electrical identification especially important on the QSB6.7.

Potential requirements can include:

Temperature Sensors
Pressure Sensors
Fuel Pressure Sensors
Boost-Related Sensors
Engine Speed Sensors
Engine Position Sensors
Wiring Harness Components
Electrical Connectors
Engine Control Components
Starter Motor
Alternator

Can a Sensor Problem Cause the QSB6.7 to Lose Power?

Yes.

Depending on the engine configuration and fault, an abnormal sensor signal can contribute to:

Warning Alarms
Fault Codes
Reduced Engine Power
Engine Derating
Poor Throttle Response
Difficult Starting
Irregular Engine Operation

However, the sensor itself is not always the cause.

Why Should Wiring Be Checked Before Replacing a Sensor?

A sensor-related fault can also result from:

Damaged Wiring
Corroded Connector
Loose Connection
Poor Ground
Moisture Intrusion
Damaged Harness
Supply-Voltage Problem

The complete circuit should therefore be checked before the component is replaced.

Cummins QSB6.7 Starter Motor and Alternator Parts

Potential requirements can include:

Starter Motor
Starter Solenoid
Alternator
Drive Belts
Pulleys
Belt-Tension Components
Electrical Connections
Related Hardware

For an older vessel, identification from the currently installed electrical component is useful because it may already have been replaced.

Cummins QSB6.7 Gasket Sets and Seals

Potential requirements can include:

Engine Gasket Sets
Cylinder Head Gasket
Valve Cover Gasket
Intake Gaskets
Exhaust Gaskets
Turbocharger Gaskets
Heat Exchanger Gaskets
Oil Cooler Gaskets
Freshwater Pump Gaskets
Thermostat Gaskets
Injector Seals
Fuel-System O-Rings
Cooling-System O-Rings
Front Crankshaft Seal
Rear Crankshaft Seal

The gasket requirement should be matched to the exact Cummins QSB6.7 engine configuration.

Cummins QSB6.7 Overhaul Parts

A planned overhaul can require:

Pistons
Piston Rings
Piston Pins
Main Bearings
Connecting Rod Bearings
Thrust Components
Cylinder Head Components
Intake Valves
Exhaust Valves
Crankshaft Seals
Engine Gaskets
Engine Seals
Fuel-System Components
Fuel Injectors
Turbocharger Components
Cooling-System Components
Lubrication-System Components

Depending on inspection findings, additional requirements may include:

Crankshaft
Connecting Rods
Camshaft Components
High-Pressure Fuel Components
Complete Turbocharger
Charge-Air Cooler Components
Freshwater Pump
Marine Seawater Pump
Heat Exchanger Components
Oil Pump
Oil Cooler
Electronic Sensors
Starter Motor
Alternator

Should a Complete Cummins QSB6.7 Overhaul Kit Be Ordered Before Disassembly?

Some planned maintenance components can be prepared beforehand.

For major internal work, however, the final parts requirement should ideally follow disassembly, inspection and measurement.

Once the engine is opened, the workshop can determine:

What condition are the cylinders in?

Can the pistons be reused?

What condition is the crankshaft in?

Which bearing specification is required?

What condition is the cylinder head in?

Are the connecting rods serviceable?

What condition is the turbocharger in?

A practical overhaul sequence is:

Identify → Diagnose → Disassemble → Clean → Inspect → Measure → Confirm Parts → Rebuild

What Information Should You Send for Cummins QSB6.7 Parts?

For accurate Cummins QSB6.7 Marine Engine Spare Parts identification, provide:

Engine Model: Cummins QSB6.7
Exact Engine Variant Where Available
Engine Serial Number
Photograph of the Engine Identification Plate
Existing Cummins Part Number
Component Manufacturer Number Where Applicable
Part Description
Quantity Required
Clear Photographs
Vessel Application
Delivery Country or Nearest Port

For fuel injectors, high-pressure fuel components, turbochargers, electronic components, freshwater pumps, seawater pumps, heat exchangers, starter motors and alternators, identification from the currently installed component is particularly useful.

Who Do We Supply?

Alfa Marine Spare Parts supports Cummins QSB6.7 Marine Engine Spare Parts requirements for:

Shipyards
Ship Repairers
Marine Engineers
Chief Engineers
Technical Superintendents
Fleet Operators
Marine Service Companies
Commercial Fishing Companies
Offshore Operators
Government Fleets
Maritime Contractors
Boat Builders
Marine Equipment Distributors
Yacht Service Companies
Commercial Vessel Operators

Worldwide Cummins QSB6.7 Marine Engine Parts Supply

Alfa Marine Spare Parts supports Cummins QSB6.7 requirements across major marine markets, including Spain, Italy, Monaco, France, the Netherlands, Belgium, Germany, Greece, the United Kingdom, Dubai and the UAE, Nigeria, Miami and Florida, Texas, Toronto and Canada, the Caribbean, South America and other major international seaports.

Whether the requirement involves fuel injectors, high-pressure fuel components, turbocharger parts, charge-air cooling components, freshwater pumps, marine seawater pumps, heat exchangers, cylinder head components, bearings, electronic sensors, gaskets or a complete Cummins QSB6.7 overhaul parts package, accurate engine identification remains the starting point.

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Cummins QSB6.7 Marine Engine Parts