Yanmar 6LF550 Marine Inboard Diesel Engine 550hp
$56,588.00
- Description
Description
Yanmar 6LF550 Marine Inboard Diesel Engine 550HP
The Yanmar 6LF550 550HP marine inboard diesel engine combines 550 metric horsepower (404 kW) at 3,000 rpm with a 6.728-litre, six-cylinder platform. Featuring Bosch common rail fuel injection, turbocharging and intercooling, it offers electronically managed diesel propulsion for recreational motorboats and yacht repower projects. YANMAR Marine International
For owners considering a Yanmar 6LF550 engine for sale, MSS Motorsports UG welcomes enquiries for engine pricing, available configurations and delivery quotations. Specify your vessel and installation requirements to request a package that accounts for the engine, transmission and helm controls.
High-Output Propulsion for Recreational Boats
The 6LF550 sits at the top of the Yanmar 6LF Series power range. Its compact format makes it a candidate for planing and semi-planing motor yachts, sportfishing boats and larger yacht tenders, subject to an installation assessment. YANMAR Marine International
Key features include:
- Bosch common rail direct injection: Electronically controlled fuel delivery.
- Turbocharged and intercooled induction: A high-output configuration within a 6.728-litre engine platform.
- Electronic vessel controls: Yanmar lists VC20/VC30 control systems for the current model; confirm the equipment supplied with your quotation.
- Electrical configuration choices: Published alternator options include 12V–90A and 24V–70A systems. YANMAR Marine International
Technical Specifications
| Specification | Manufacturer-Published Details |
|---|---|
| Engine model | Yanmar 6LF550 |
| Maximum crankshaft output | 404 kW / 550 MHP |
| Rated engine speed | 3,000 rpm |
| Engine configuration | Inline six-cylinder, four-stroke diesel |
| Displacement | 6.728 litres |
| Bore × stroke | 104 × 132 mm |
| Fuel system | Bosch common rail direct injection |
| Aspiration | Turbocharged and intercooled |
| Engine management | Electronic |
| Cooling | Coolant circuit with heat exchanger |
| Published dry weight | 780 kg, without marine gearbox |
| Intended use | Recreational applications |
These specifications follow Yanmar’s published product documentation and operation manual. yanmar.com
MHP means metric horsepower. The advertised 550HP designation refers to Yanmar’s 550 MHP rating. Published output is measured at the crankshaft; delivered propeller-shaft power depends on the drivetrain.
Operating Duty and Application Suitability
Yanmar’s operation manual identifies the 6LF550 for recreational use, and the manufacturer states that it is not EPA Commercial certified. Commercial operators should confirm the required application approval and emissions certification before selecting this model. The 550 MHP output should not be presented as an unrestricted continuous-duty rating. yanmar.com
For a lower-output alternative within the same family, compare the Yanmar 6LF530 marine diesel engine. Confirm the duty rating and certification applicable to the exact engine offered.
Marine Gearbox and Control Options
Yanmar 6LF550 550HP published 6LF documentation includes the ZF280-1 parallel transmission and ZF280-1A down-angle transmission, both using hydraulic multi-disc clutches. Gearbox selection and reduction ratio must match the vessel’s propeller demand, shaft arrangement and operating profile. yanmar.com
For a marine engine repower, assess engine-bed dimensions, gearbox position, exhaust routing, seawater supply, ventilation and service access. An existing gearbox or control system should only be retained after compatibility has been checked.
Review the official Yanmar 6LF specification sheet for manufacturer reference data. Final installation planning requires drawings for the selected engine and gearbox configuration.
Confirm Your Engine Supply Package
A clear quotation helps you compare complete installation costs. Request written confirmation of:
- Engine condition, model identification, serial number and available documentation.
- Gearbox model, reduction ratio, electrical voltage, helm controls, displays and wiring included.
- Mounts, exhaust components and other supplied accessories.
- Applicable warranty provider, coverage, exclusions and commissioning requirements.
- Availability, dispatch estimate, packing arrangements and delivery charges.
Manufacturer specifications describe the engine platform. The quotation should establish the condition and contents of the particular unit being supplied.
Frequently Asked Questions
Is the Yanmar 6LF550 550HP suitable for a boat repower?
It can be considered where the vessel’s power requirement, duty, installation space and drivetrain suit the engine. A fit assessment should precede purchase.
Does the engine include a gearbox and electronic controls?
Inclusions depend on the offered package. Ask for an itemised quotation identifying the transmission, controls, displays and installation accessories.
Does every engine carry a Yanmar manufacturer warranty?
Warranty eligibility depends on the unit, supply arrangement and applicable terms. Request written confirmation of the warranty provider and coverage before ordering.
Request Your Yanmar 6LF550 Quote
Ready to price your Yanmar 6LF550 550HP marine diesel engine? Contact MSS Motorsports UG for a quotation with your vessel make and model, current engine and gearbox, required reduction ratio, intended operating duty and purchase timing. Include your billing and delivery addresses so pricing and transport costs can be assessed for your destination.
