Yanmar 4LH-STE 240HP Marine Inboard Diesel Engine Turbocharged

Yanmar 4LH-STE Marine Inboard Diesel Engine Turbocharged

The Yanmar 4LH-STE marine inboard diesel engine combines a 3.455-litre, four-cylinder platform with direct fuel injection, turbocharging and intercooling. For boat owners planning a replacement engine or shaft-drive repower, it provides a Yanmar 4LH option to assess against the vessel’s power requirements, installation space and existing transmission. Manualzz

Contact MSS Motorsports UG for current Yanmar 4LH-STE availability, pricing and package details. Request an offer identifying the engine’s condition, documented output and included equipment so you can budget for the complete installation.

Power-rating clarification: This product is currently listed as 240HP. Yanmar’s 4LH operation manual specifies 169 kW / 230HP at 3,300 rpm as the 4LH-STE’s one-hour crankshaft rating. A 240HP rating for the offered unit requires supporting documentation and confirmation of the exact model designation. Manualzz

Turbocharged Performance in a Four-Cylinder Platform

The 4LH-STE brings together several features relevant to a marine diesel replacement:

• Turbocharging and intercooling: Compressed intake air passes through an air cooler before entering the engine.
• Direct diesel injection: Fuel is injected directly into the combustion chambers.
• Freshwater cooling: The engine uses a freshwater circuit with seawater heat exchange.
• Inboard shaft-drive arrangement: Factory documentation identifies a marine gearbox configuration for conventional shaft propulsion. Manualzz

For a cruiser, recreational fishing boat or other repower project, compare the engine’s operating rating with your hull displacement, propeller load and intended use. This assessment helps establish whether the proposed engine and drivetrain suit your vessel.

Technical Specifications

The table describes the factory-documented model. Confirm the offered engine’s identification and rating before selecting the installation duty. Manualzz

Consult the Yanmar 4LH Series operation manual for model-specific manufacturer information.

Gearbox Matching and Repower Planning

Yanmar’s original documentation identifies the Hurth HSW630A1 marine gearbox for the 4LH-STE. The gearbox supplied with an individual engine must be confirmed in the quotation. Brandt

If you plan to retain your existing transmission, provide its model, serial number and reduction ratio. Your installer should review the coupling, mounting positions, shaft alignment, exhaust routing, cooling connections and propeller demand.

If your requirement is specifically for a manufacturer-listed 240 MHP model, compare the Yanmar 4LHA-STP 240HP marine diesel engine. Its model designation and installation requirements should be checked separately. YANMAR Marine International

Engine Condition, Equipment and Warranty

Compare the complete package when reviewing a Yanmar 4LH-STE price. Ask for the unit’s serial number, stated condition, recorded operating hours and available maintenance, inspection or test records.

The written offer should identify whether the gearbox, instrument panel, wiring harness, controls, mounts and exhaust elbow are included. For any reconditioning claim, request details of the work completed and supporting records.

Any applicable warranty should specify the provider, coverage period, exclusions and claim procedure. Confirm packing, estimated dispatch timing, freight charges and delivery terms alongside the equipment price.

Frequently Asked Questions

Is the 4LH-STE factory-rated at 240HP?

The Yanmar documentation reviewed lists the 4LH-STE at 230HP for its one-hour rating. The advertised 240HP figure needs documentation for the specific engine offered. Brandt

Can I reuse my existing marine gearbox?

Possibly, following an installation assessment. Provide the gearbox model, reduction ratio and connection details for compatibility review.

Does the engine include a manufacturer warranty?

Warranty eligibility and terms must be confirmed for the quoted unit. Request written coverage details before ordering.

Request Your Yanmar 4LH-STE Quote

Move your repower project forward with a quotation covering the correct engine, drivetrain and delivery requirements. Request Yanmar 4LH-STE pricing and availability from MSS Motorsports UG.

Include your boat make and model, existing engine, gearbox model and required ratio, preferred equipment package, how soon you plan to purchase, and billing and delivery addresses. Request confirmation of the engine’s documented power rating with your itemised quotation.