Yanmar 4JH Engine Parts

Yanmar

4JH engine parts

Earlier mechanical 4JH / 4JH common rail

Browse parts for Yanmar 4JH four-cylinder marine diesels across earlier mechanical and later common-rail generations. The complete model suffix, engine serial number and marine-gear or saildrive identification are essential before selecting a service part.

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Service & maintenance

Start your parts search

Collections are browsing aids and include parts for other engines. Confirm the complete model, serial number and exact assembly before ordering.

Browse collectionEngine maintenanceBrowse Yanmar service and maintenance parts.Browse collection

Browse collectionYanmar partsBrowse the Yanmar catalogue; match the complete engine model.Browse collection

Browse collectionImpellersBrowse marine impellers across brands; identify the actual seawater pump.Browse collection

Browse by system

Find your service category

These broader collections help you browse. A category link does not confirm engine-specific compatibility.

MaintenanceBrowse the maintenance collectionBrowse category Yanmar catalogueBrowse the yanmar catalogue collectionBrowse category FiltersBrowse the filters collectionBrowse category ImpellersBrowse the impellers collectionBrowse category Belts & hosesBrowse the belts & hoses collectionBrowse category Gaskets & sealsBrowse the gaskets & seals collectionBrowse category Sensors & sendersBrowse the sensors & senders collectionBrowse category ExhaustBrowse the exhaust collectionBrowse category

Before selecting parts

Identify the engine you have

Use the complete identification to select the correct generation, diagram and replacement part.

Earlier mechanical 4JH

Keep the exact 4JH generation and suffix. Naturally aspirated and turbocharged versions have different fuel, cooling and air-system assemblies; a shared 4JH prefix does not establish fitment.

4JH common rail

4JH45 and 4JH57 are naturally aspirated common-rail models. 4JH80 and 4JH110 are turbocharged and intercooled common-rail models. Earlier mechanical injection parts require a separate model match.

Marine gear & saildrive

Identify the installed marine gear or saildrive from its own plate. Cooling pumps, exhaust fittings and installation equipment need the full engine and propulsion configuration.

Do not carry specifications or parts compatibility between earlier 4JH generations and 4JH45, 4JH57, 4JH80 or 4JH110 simply because the prefix matches.

A full model such as 4JH4E or 4JH80 tells the Parts Desk more than “4JH.” Include the suffix, serial number and a photo of the old part so the correct generation and assembly can be checked.

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Documented installations

Boat examples

These examples describe documented engine options or installations. Boats may have been repowered or modified; an example does not establish present-day parts compatibility.

Jeanneau Sun Odyssey 45 DS (2010 brochure)

Factory specifications list a 4JH4E at 54 hp and an optional 4JH4-TE at 75 hp.

Jeanneau Sun Odyssey 50 DS (2010 brochure)

Factory specifications list a 4JH4-TE at 75 hp and an optional 4JH4-HTE at 110 hp.

Beneteau Oceanis 40.1

A current builder configuration specifies a 4JH45 common-rail engine.

Serial number help

Request a parts check

Send the Parts Desk the complete engine model and serial number, the OEM part number if known, and clear photos of the identification plate and old part. Include the installed fuel and cooling equipment when asking about those systems.

Include in your message

Complete engine model, suffix and serial number
OEM part number, if known
Identification-plate and old-part photos
Drive, transom or marine-gear identification for those parts

Parts Desk

Help before you order

Send your details through our contact page. The Parts Desk can help check the exact application before you select a replacement.

Ask the Parts Desk