Yanmar 6LY2A-STP 440HP Diesel Marine Engine – Performance and Precision for Demanding Marine Applications

The Yanmar 6LY2A-STP 440HP Diesel Marine Engine, available through Marine Inboard Specialists, delivers the perfect balance of high-speed performance, lightweight design, and marine-grade durability. Engineered for recreational yachts, fishing boats, and commercial vessels, this 6-cylinder turbocharged inboard diesel engine is a powerful yet compact solution for propulsion systems requiring maximum torque and fuel efficiency in a streamlined package.

With 440HP at 3300 RPM, direct injection fuel delivery, and a turbocharged intercooler system, the 6LY2A-STP ensures dependable acceleration, lower emissions, and efficient operation—even under extended duty cycles.

Why Choose the Yanmar 6LY2A-STP 440HP Marine Diesel Engine?

High-Speed Marine Power

• Rated at 324 kW (440HP) @ 3300 RPM, this engine delivers responsive power for fast cruising, towing, or offshore transport.

Lightweight, Compact Design

• At only 565 kg, the 6LY2A-STP is ideal for vessels requiring a high power-to-weight ratio, making it perfect for both new installations and repowering tight engine bays.

Turbocharged Efficiency

• Equipped with a turbocharger and intercooler, it maintains consistent output while improving combustion efficiency and fuel economy.

Precision Fuel Control

• Features direct injection with an in-line fuel pump, enabling precise fuel delivery, cleaner combustion, and reduced operating costs.

Emissions Compliant

• Complies with IMO Tier 2 emissions standards and is compatible with an IMO Tier III upgrade kit for enhanced environmental compliance.

Global Certifications

• Type-approved by NK, ABS, BV, RINA, and CCS, ensuring international readiness.

Technical Specifications – Yanmar 6LY2A-STP 440HP Marine Engine

Package Contents

Every Yanmar 6LY2A-STP 440HP engine package from Marine Inboard Specialists includes:

• Yanmar 6LY2A-STP Diesel Marine Engine

• Turbocharger + Intercooler System

• Fuel Pre-Filter with Water Separator

• Alternator (12V – 80A)

• Exhaust Mixing Elbow

• Mechanical Engine Controls

• Flexible Engine Mounts

• Belt Safety Cover

• Detailed User Manual for Installation & Maintenance

Optional Accessories

Customize your setup with the following add-ons:

• High-Riser Exhaust Mixing Elbow

• Custom Gearbox Options (for ZF or Kanzaki configurations)

• Spare Parts Kit for onboard maintenance

• Hot Water Kit with Cocks

• Extended Wiring Harness (3m, 5m, 10m)

• IMO Tier III Compliance Kit

Applications

This powerful, lightweight inboard engine is suitable for a wide range of marine applications:

• Recreational Yachts – Quiet, fuel-efficient cruising with reliable torque.

• Commercial Workboats – Built for daily operation and continuous use.

• Fishing Vessels – Robust enough for long runs and towing nets.

• Offshore Support Boats – Fast and consistent performance for mission-critical operations.

Warranty & Support

The Yanmar 6LY2A-STP comes with a 5-year manufacturer warranty, protecting against defects in materials or workmanship. Purchasing through Marine Inboard Specialists includes:

• Genuine Yanmar parts and accessories

• Professional consultation for engine selection and integration

• Technical support for installation and repowering

• Global shipping and logistics coordination

Frequently Asked Questions (FAQs)

1. What types of vessels can use the Yanmar 6LY2A-STP?
This engine is ideal for yachts, fishing vessels, commercial boats, and offshore workboats needing high speed and torque in a compact setup.

2. Is the 6LY2A-STP good for repowering older boats?
Yes. Its lightweight design and mechanical control system make it easy to integrate into existing hulls and confined spaces.

3. How fuel-efficient is it?
With direct injection and an in-line pump, the engine optimizes fuel usage while maintaining high power output.

4. What emissions certifications does it meet?
It complies with IMO Tier 2 emissions regulations and is compatible with Tier III upgrades.

5. Does it include installation support?
Marine Inboard Specialists offers full pre-sale and post-sale technical support, including installation guidance and maintenance planning.

Contact Marine Inboard Specialists Today

Power your vessel with the proven performance of the Yanmar 6LY2A-STP 440HP marine diesel engine. Contact Marine Inboard Specialists for expert assistance, real-time availability, and a custom quote. We ship globally and provide trusted support every step of the way.