Description

Yanmar 6LY3-UTP Marine Inboard Diesel Engine 380HP

The Yanmar 6LY3-UTP 380HP marine inboard diesel engine offers 380 metric horsepower (279 kW) at 3,300 rpm from a 5.813-litre inline six-cylinder platform. Its 24-valve design, turbocharging, intercooling and electronically controlled direct injection provide a propulsion option for recreational boats and carefully planned marine repower projects. YANMAR Marine International

Looking for a Yanmar 6LY3-UTP engine for sale? Contact MSS Motorsports UG to request pricing, engine condition, available gearbox configurations and the equipment included in your supply package.

Six-Cylinder Propulsion for Recreational Boats

The 6LY3-UTP combines a six-cylinder layout with electronic injection management and freshwater cooling through a heat exchanger. For owners considering a replacement engine for a cruiser or recreational sportfishing boat, selection should account for the hull’s power requirement, installation space and intended cruising profile.

Key features include:

  • 24-valve engine design: A four-stroke, inline-six marine diesel configuration.
  • Turbocharged and intercooled induction: Supports the engine’s published 380 MHP maximum output.
  • Electronic injection management: Yanmar specifies electronically controlled direct injection.
  • Helm control choices: Manufacturer-listed options include Classic hybrid and Unlimited electronic controls.
  • Published engine-only dry weight of 640 kg: Gearbox, fluids and installation equipment add to the installed weight. YANMAR Marine International

Technical Specifications

SpecificationManufacturer-Published Details
Engine modelYanmar 6LY3-UTP
Maximum crankshaft output279 kW / 380 MHP at 3,300 rpm
Published continuous crankshaft rating254 kW / 345 MHP at 3,198 rpm
Displacement5.813 litres
ConfigurationInline six-cylinder, four-stroke diesel
Valve arrangement24 valves
Bore × strokeApproximately 106 × 110 mm
Fuel systemElectronically controlled direct injection
AspirationTurbocharged and intercooled
Cooling systemLiquid cooling with heat exchanger
Dry weight without gearbox640 kg
Intended applicationRecreational craft

Specifications follow Yanmar’s published product documentation and operation manual. YANMAR Marine International

MHP means metric horsepower. The advertised 380HP figure describes maximum crankshaft output. It should be distinguished from the lower continuous rating and the power delivered through the gearbox to the propeller.

Understand the Operating Rating

Yanmar’s operation manual specifies recreational use and limits maximum-throttle operation to less than 5% of total engine time, illustrated as 30 minutes in every 10 hours. The manual’s continuous power figure does not establish approval for unrestricted commercial service. yanmar.com

For a repower, assess propeller loading alongside the power rating. The installation should allow the engine to reach its specified operating speed under the manufacturer’s prescribed conditions.

If your project requires a different output, compare the Yanmar 6LY3-ETP marine inboard diesel engine. Engine selection should follow the vessel’s requirements rather than horsepower alone.

Gearbox and Electronic Control Integration

Yanmar documents the KMH61A marine gearbox, featuring an 8-degree down-angle arrangement and a hydraulically operated multi-disc clutch, as one 6LY3-UTP transmission configuration. yanmar.com

Confirm the gearbox model, reduction ratio, shaft position and control equipment before ordering. Existing helm controls, wiring and transmissions require compatibility checks before reuse.

The official Yanmar 6LY3-UTP product information provides manufacturer specifications and access to technical documents. Use drawings for the exact engine, gearbox and exhaust arrangement when planning the installation.

Confirm What Your Quotation Includes

A useful Yanmar 6LY3-UTP 380HP price should identify the complete supply scope. Request confirmation of:

  • Engine condition, serial number, operating hours where applicable and available service or rebuild records.
  • Any inspection report, running-test evidence and associated test conditions.
  • Gearbox model and ratio, control heads, instruments, harnesses and supplied accessories.
  • Applicable warranty provider, coverage and commissioning requirements.
  • Availability, packing, dispatch estimate and delivery charges.

Electrical equipment can differ between configurations and production versions. Confirm the fitted voltage and alternator specification against the particular engine offered.

Frequently Asked Questions

Is 380HP the continuous rating?

No. Yanmar publishes 380 MHP at 3,300 rpm as maximum output and 345 MHP at 3,198 rpm as the continuous crankshaft rating. Recreational operating limits still apply. yanmar.com

Does the engine include a marine gearbox?

That depends on the offered package. Request an itemised quotation specifying the gearbox, reduction ratio and included control equipment.

Is a manufacturer warranty included?

Warranty eligibility depends on the engine and supply arrangement. Obtain the applicable terms in writing before purchase.

Request Your Yanmar 6LY3-UTP 380HP Quote

Contact MSS Motorsports UG for a Yanmar 6LY3-UTP quotation with your vessel make and model, existing engine, gearbox model and reduction ratio, intended operating profile and purchase timing. Include your billing and delivery addresses to request equipment pricing and transport costs for your destination.