129473-18000 / MY34 Aftermarket Yanmar IHI Turbocharger 129473-18000 / 4JH-DTE | Sawley's Select Marine Parts

🔧 Product Description

Sawley's Select Marine Parts Aftermarket Yanmar 4JH RHB52HW Marine Turbocharger - Replacement for Part Number: 129473-18000

A new aftermarket IHI MY34 marine turbocharger for selected Yanmar 4JH-DTE, 4JH2-DTE and 4JH2-UTE diesel engines.

The original Yanmar parts catalogue identifies 129473-18000 as an RHB52HW turbocharger. This unit corresponds with IHI short code MY34 and alternate IHI references VA130039 and NB150012.

The turbocharger supplies pressurised intake air to the 1.64-litre four-cylinder engine, allowing it to produce approximately 77HP while maintaining normal smoke and exhaust-temperature levels.

⚙️ Key Features

• New aftermarket Yanmar marine turbocharger

• Replaces Yanmar part number 129473-18000

• IHI MY34 turbocharger specification

• RHB52HW marine turbocharger configuration

• Suitable for serial-number-controlled 4JH and 4JH2 applications

• Direct replacement where the listed Yanmar and IHI references are fitted

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• Yanmar 129473-18000 - Early RHB52HW turbocharger

• Yanmar 129474-18001 - Later turbocharger used on applicable 4JH-DTE engines from the specified serial-number change

• The two units must not be interchanged without confirming the engine serial number and original turbo identification

OEM / Related Numbers:

• 129473-18000

• 12947318000

• IHI: MY34

• IHI: VA130039

• IHI: NB150012

• IHI: B51CND-S0039B

• IHI: B51CND-S0039G

• Related reference: 5T-628

• Turbo Model: RHB52

• Yanmar Catalogue Description: RHB52HW

• Engine Family: Yanmar 4JH / 4JH2

Aftermarket / Verified Equivalents:

• Recmar: MY34 replacement turbocharger

• Turbochargers Direct: TUR-103354-TDN

• Aftermarket IHI RHB52 replacement for VA130039

• Aftermarket replacement for Yanmar 129473-18000

• Aftermarket MY34 turbocharger for compatible 4JH-DTE engines

🚤 Compatibility

Commonly used on:

• Yanmar 4JH-series marine diesel engines

• Turbocharged and direct-injection inboard propulsion engines

• Shaft-drive sailing and small-powerboat installations

• Serial-number-controlled 4JH and 4JH2 applications

Typically suits:

• Yanmar 4JH-DTE:

• Up to engine serial number E30945

• Yanmar 4JH2-DTE:

• Applicable engines from serial number E35728 where 129473-18000 / MY34 is specified

• Yanmar 4JH2-UTE:

• Applicable engines from serial number E41490 where the MY34 turbocharger is specified

• Related catalogued engine descriptions:

• Yanmar 4JHDTE

• Yanmar 4JH2-TE applications specifically listing MY34 / VA130039

Engine specifications:

• Representative Rated Output: Approximately 77HP

• Engine Displacement: Approximately 1.64 litres

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

• Fuel System: Direct mechanical fuel injection

• Induction System: Turbocharged

• Fuel Type: Diesel

• Principal Early Production Period: Approximately 1983-1989 for the original 4JH-DTE application

Important fitment note:

• Fitment is controlled by the engine model and serial number.

• Yanmar 4JH-DTE engines from serial number E30946 use later turbocharger 129474-18001 according to the parts catalogue.

• Confirm Yanmar 129473-18000, IHI MY34 or IHI VA130039 on the original unit.

• Other 4JH engines may use MY67, 129571-18000 or another IHI turbocharger that is not interchangeable.

• Do not select the turbocharger solely from the general 4JH engine name.

🔌 Function

The turbocharger uses exhaust-gas energy to rotate the turbine and compressor wheels.

The compressor increases the quantity of air delivered to the cylinders, allowing the engine to burn the injected fuel efficiently and produce its rated output.

Common signs of turbocharger failure:

• Reduced engine power

• Engine cannot reach rated loaded rpm

• Slow acceleration

• Excessive black exhaust smoke

• Blue smoke or increased engine-oil consumption

• Oil inside the compressor outlet or intake manifold

• High-pitched whistle or siren noise

• Grinding or wheel-contact noise

• Excessive radial or axial shaft movement

• Damaged compressor or turbine blades

• High exhaust-gas temperature

• Carbon or corrosion damage in the turbine housing

Installation considerations:

• Confirm the engine model and serial number

• Match Yanmar 129473-18000 or IHI MY34 / VA130039

• Verify that the engine has not been updated to 129474-18001

• Correct the cause of the original turbocharger failure

• Replace the engine oil and oil filter

• Inspect the turbo oil-feed pipe for carbon or restriction

• Confirm unrestricted flow through the oil-return pipe

• Clean the intake manifold and associated hoses

• Remove oil and metal debris from the intake system

• Check the air cleaner and crankcase breather

• Inspect the exhaust manifold and mixing elbow

• Prime the turbocharger centre housing with clean engine oil

• Fit new mounting and oil-line gaskets

• Establish engine oil pressure before operating at speed

• Check for oil, intake-air and exhaust leaks

• Verify loaded engine rpm and boost performance during sea trials

📦 Condition

• Sawley's Select Marine Parts aftermarket replacement

• Brand new

• Supplied in protective packaging

• Installation gaskets and sealing washers not included unless specifically listed