4035782H Aftermarket Cummins Marine 6B / QSB Turbocharger 4089816/4035781/4038244 HOLSET (4035782H) | Sawley's Select Marine Parts

🔧 Product Description

Sawley's Select Marine Parts Aftermarket Cummins 6B / QSB 5.9L HX40M Marine Turbocharger - Replacement for Part Numbers: 4035782H and 4089816

A new aftermarket HX40M fixed-geometry marine turbocharger for selected Cummins 6B and QSB 5.9-litre diesel engines.

This unit replaces the Holset turbocharger identified by 4035782H and Cummins service kit 4089816. It is used on applicable mechanically injected 6B-series engines rated at approximately 355HP and common-rail QSB5.9 engines rated at approximately 380HP.

The turbocharger uses a water-cooled marine turbine housing and supplies compressed air through the engine's seawater-cooled aftercooler.

⚙️ Key Features

• New aftermarket Cummins marine turbocharger

• Replaces Holset 4035782H

• Replaces Cummins turbocharger kit 4089816

• Holset HX40M marine configuration

• Fixed-geometry turbocharger design

• Water-cooled turbine housing

• Suitable for selected 6B 355HP and QSB5.9-380 engines

• Direct replacement where the listed identification numbers are fitted

🔄 Supersession & Cross Reference

Verified Part-Number Family:

• Holset 4035781 - Complete turbocharger reference

• Holset 4035781H - New Holset unit reference

• Holset 4035782 - Related complete turbocharger reference

• Holset 4035782H - New Holset unit reference

• Holset 4038244 - Verified alternate Holset reference

• Cummins 4089816 - Complete Cummins turbocharger kit

• Cummins 408981600 - Extended Cummins reference

Number check:

• The number 40238244 is a common mistyping of it.

• The verified Holset alternate number is 4038244.

• Confirm the original identification plate rather than relying on the mistyped number.

OEM / Related Numbers:

• 4035782H

• 4035782

• 4035781H

• 4035781

• 4038244

• 4089816

• 408981600

• Turbo Model: HX40

• Turbo Model: HX40M

• Turbo Specification: HX40-L8294T/J13S3

• Centre Housing Rotating Assembly: 4027283

• Centre Housing Rotating Assembly: 4027283H

• Bearing Housing: 3532632

• Related Bearing Housing: 3599943

• Related Bearing Housing: 4027754

• Related Bearing Housing: 4035136

• Compressor Cover: 3536623

• Compressor Wheel: 3599591

• Turbine Housing: 4035833

• Related Turbine Housing: 3599050

• Turbine Wheel: 3536624

• Repair Kit: 3575169

• Related Gasket Kit: DGK0121

Aftermarket / Verified Equivalents:

• Aftermarket HX40M replacement for Holset 4035782H

• Aftermarket replacement for Cummins 4089816

• Aftermarket replacement for Holset 4035781

• Aftermarket replacement for Holset 4038244

• HX40M marine replacement for Cummins 6B / QSB5.9

🚤 Compatibility

Commonly used on:

• Cummins 6B-series marine diesel engines

• Cummins QSB5.9 common-rail marine engines

• Turbocharged and seawater-aftercooled propulsion engines

• Inboard shaft-drive installations

• Recreational and commercial marine applications

Typically suits:

• Cummins 6B / 6BTA 5.9 marine applications rated at approximately 355HP where turbocharger 4035782H is fitted

• Cummins QSB5.9-380 high-output marine engines

• Cummins QSB 5.9 engines specifying turbocharger kit 4089816

• 2003-and-later Cummins marine installations using the HX40-L8294T/J13S3 configuration

Engine specifications:

• 6B Representative Rating: Approximately 355HP at 3000rpm

• QSB5.9 Representative Rating: 380 metric horsepower / approximately 375 brake horsepower at 3000rpm

• Engine Displacement: Approximately 5.9 litres

• Engine Configuration: Inline six-cylinder, four-stroke diesel

• Fuel System:

• Mechanical injection on applicable 6B engines

• High-pressure common rail on QSB5.9 engines

• Induction System: Turbocharged and seawater aftercooled

• Turbocharger Type: Holset HX40M fixed geometry

• Representative Production Period: Approximately 2003 onward

Important fitment note:

• Cummins used several HX35, HX40 and related turbochargers across the 6B and QSB engine families.

• Do not order solely by the engine displacement or horsepower.

• Confirm Cummins 4089816 or Holset 4035782H on the original turbocharger.

• Verify the engine serial number and Cummins CPL.

• Check the compressor outlet and turbine-housing orientation against the original unit.

🔌 Function

The turbocharger converts exhaust energy into compressor-wheel speed and supplies pressurised air to the engine aftercooler.

The aftercooler reduces the compressed-air temperature before the air reaches the cylinders, increasing air density and supporting efficient fuel combustion.

Common signs of turbocharger failure:

• Engine will not reach rated loaded rpm

• Reduced vessel acceleration

• Low or unstable boost pressure

• Excessive black exhaust smoke

• Blue smoke or increased oil consumption

• Oil inside the compressor outlet or aftercooler

• High exhaust-gas temperature

• High-pitched whistle or siren noise

• Grinding or wheel-contact noise

• Excessive radial or axial shaft movement

• Damaged compressor or turbine blades

• Carbon restriction in the turbine housing

• Corrosion or leakage from the water-cooled turbine housing

Installation considerations:

• Verify the engine serial number and CPL

• Match Holset 4035782H or Cummins 4089816

• Correct the original cause of turbocharger failure

• Replace the engine oil and oil filter

• Inspect or replace the turbo oil-feed pipe

• Confirm unrestricted oil-return flow

• Clean the aftercooler and intake hoses

• Remove oil, carbon and metal contamination from the intake system

• Inspect the air cleaner and crankcase breather

• Check the exhaust manifold and mixing elbow

• Flush the turbine-housing coolant passages

• Prime the centre housing with clean engine oil

• Fit new oil-line, manifold and exhaust gaskets

• Establish engine oil pressure before operating at speed

• Check for oil, coolant, intake-air and exhaust leakage

• Verify boost pressure and rated engine rpm during sea trials

📦 Condition

• Sawley's Select Marine Parts aftermarket replacement

• Brand new

• Supplied in protective packaging

• Installation gasket kit not included unless specifically listed