Yanmar 4JH5E Marine Inboard Diesel Engine

Yanmar 4JH5E Marine Inboard Diesel Engine

The Yanmar 4JH5E 53.8HP marine inboard diesel engine delivers 53.8 metric horsepower (39.6 kW) at 3,000 rpm from a 2.19-litre, four-cylinder platform. Natural aspiration, direct injection and mechanical engine management make it a candidate for recreational sailboats, displacement craft and marine repower projects.

Looking for a Yanmar 4JH5E 53.8HP engine for sale? Request a quotation from MSS Motorsports UG covering engine condition, the required gearbox or drive configuration, instrumentation and delivery to your destination.

Naturally Aspirated Diesel Power for Cruising

The 4JH5E uses direct injection with a mono-plunger pump and mechanical controls. Its inline-four layout and published dry weight of 201 kg without gearbox provide useful reference points when assessing a replacement installation.

Key features include:

• 2.19-litre displacement: Four cylinders with an 88 × 90 mm bore and stroke.
• Natural aspiration: Yanmar’s published air-intake configuration for this model.
• Mechanical engine management: A basis for assessing compatibility with existing throttle controls.
• Freshwater cooling: A coolant circuit with seawater heat rejection.
• 12V / 125A alternator: Manufacturer-listed charging equipment.

For a cruising yacht or small recreational vessel, assess the engine against hull displacement, propeller demand and intended operating speed. Your installer should also review engine-bed dimensions, exhaust routing, cooling-water supply and service access.

Technical Specifications

Specifications follow Yanmar’s published datasheets and operation manual.

MHP means metric horsepower. The 53.8 MHP figure is maximum crankshaft output. The continuous rating and the power transmitted through the gearbox to the propeller are separate figures.

Operating Rating and Vessel Suitability

Yanmar’s JH operation manual identifies recreational use and specifies maximum-throttle operation for less than 5% of total engine time. Read the continuous rating alongside the applicable operating instructions when planning cruising loads and operating hours.

For an engine replacement, matching horsepower is only one part of selection. Gear ratio, propeller loading, installation geometry and the condition of retained equipment also require assessment.

Explore the Yanmar JH marine engine range to compare other models and outputs.

Gearbox, Saildrive and Instrument Options

Yanmar’s published Yanmar 4JH5E 53.8HP documentation includes:

• KM35P and KM35A2: Marine gearboxes using mechanical cone clutches.
• KM4A1-5 and ZF30M: Additional documented shaft-drive transmission configurations.
• SD60: A documented saildrive arrangement requiring confirmation of the correct engine version and installation components.

Specify the gearbox or saildrive model, reduction ratio and connection requirements before ordering. Existing transmissions should be retained only after compatibility and condition checks.

Yanmar also lists a B20 instrument panel in its reference engine package and a C30 panel as an option. Ask the quotation to identify the panel, wiring harness and controls actually supplied.

Review the official Yanmar 4JH5E specifications and technical documents for manufacturer reference information.

Confirm Your Engine Supply Package

A useful Yanmar 4JH5E 53.8HP price should establish the complete supply scope. Request written confirmation of:

• Engine condition, serial number and operating hours where applicable.
• Available service history, rebuild documentation and running-test evidence.
• Gearbox or saildrive model, ratio, instruments, wiring and controls included.
• Mounts, exhaust components and other supplied accessories.
• Warranty provider, coverage and commissioning requirements.
• Availability, packing, dispatch estimate and delivery charges.

Provide photographs of the existing engine and gearbox or saildrive identification plates with your enquiry. These details help establish the current installation and the information needed to assess a replacement package.

Frequently Asked Questions

What horsepower does the Yanmar 4JH5E produce?

Yanmar publishes a maximum output of 53.8 MHP at 3,000 rpm and a continuous crankshaft rating of 48.9 MHP at 2,907 rpm. Recreational operating instructions still apply.

Is the Yanmar 4JH5E 53.8HP turbocharged?

Yanmar specifies natural aspiration for this model.

Does the engine include a gearbox and warranty?

These depend on the offered engine and supply package. Request an itemised quotation and written confirmation of the warranty provider and applicable terms.

Request Your Yanmar 4JH5E Quote

Contact MSS Motorsports UG for a Yanmar 4JH5E quotation with your vessel make and model, existing engine, gearbox or saildrive model, reduction ratio, intended operating profile and purchase timing. Include your billing and delivery addresses to request equipment pricing and transport costs for your destination.