Description

YANMAR 6LY440 440HP Marine Diesel Engine – Advanced Power, Precision, and Efficiency

Experience next-generation propulsion with the YANMAR 6LY440 Marine Diesel Engine, now available from Marine Inboard Specialists. Designed for recreational yachts, commercial vessels, and patrol boats, this 440HP inboard diesel engine represents the pinnacle of marine engineering, combining over 30 years of proven reliability with cutting-edge electronic control and fuel efficiency.

As the latest evolution of YANMAR’s iconic 6LY series, the 6LY440 delivers uncompromising performance, cleaner emissions, and smoother operation—ideal for both new builds and repower projects.

Why Choose the YANMAR 6LY440 Marine Engine?

Optimized for Modern Marine Demands

• Delivers 324 kW (440 mhp) @ 3300 RPM, ensuring rapid acceleration, strong cruising power, and dependable long-term operation.

High-Pressure Common Rail Fuel System

• The switch from traditional injectors to a common-rail injection system enhances atomization, improving fuel economy, power-to-weight ratio, and reducing emissions.

Turbocharged & Intercooled

• Delivers maximum combustion efficiency and performance in a compact design optimized for space-limited engine rooms.

24-Valve Cylinder Head with Redesigned Manifolds

• Offers improved airflow, combustion, and exhaust management, resulting in greater fuel efficiency and lower emissions.

Digital Precision Control

• Fully electronic engine management ensures pinpoint accuracy in fuel delivery, aspiration, and monitoring—giving you complete command over every nautical mile.

Seamless Control with YANMAR VC10 Vessel Control System

For effortless maneuvering and throttle response, the optional YANMAR VC10 ‘Fly-by-Wire’ system includes:

• Smooth throttle and gear shifting with joystick docking capabilities

• Dual CAN-bus systems for separate engine and diagnostics functions

• 3.5-inch IP66-rated display with UV protection and anti-fog features

• Seamless integration with NMEA2000 GPS, chart plotters, and onboard systems

Technical Specifications – YANMAR 6LY440 Diesel Engine

What’s Included in the Engine Package

Your purchase from Marine Inboard Specialists includes:

• YANMAR 6LY440 Marine Diesel Engine

• Marine Gearbox (ZF or Kanzaki based on application)

• Exhaust Mixing Elbow (Standard or High-Riser)

• Air Heater & Fuel/Water Separator

• Flexible Engine Mounts

• Installation & Maintenance Manual

Optional Accessories Available

Upgrade your system with these optional enhancements:

• VC10 Vessel Control System (Throttle, Shift, & Joystick Controls)

• Custom Exhaust Systems

• Extended Wiring Harnesses

• Secondary Alternators (12V or 24V)

• Advanced Engine Monitoring Displays

• IMO Tier III Upgrade Kit

Applications for the YANMAR 6LY440

This engine is ideal for a wide range of marine operations:

• Luxury Yachts – Smooth, quiet, and fuel-efficient cruising

• Patrol Boats – High output and responsive throttle control

• Commercial Vessels – Built for daily operation and reliability

• Fishing & Workboats – Proven strength and ease of serviceability

Frequently Asked Questions (FAQs)

1. What’s the difference between the 6LY440 and older YANMAR models?
The 6LY440 introduces common-rail injection, a 24-valve head, and full electronic controls—providing more power, less fuel use, and lower emissions.

2. Can the YANMAR 6LY440 be installed in older boats?
Yes. It maintains the same footprint as previous 6LY models, making it ideal for repowering with minimal retrofitting.

3. Does it meet emissions regulations?
Absolutely. It is compliant with IMO Tier 2, EPA Tier 3, and RCD 2, with available upgrades for Tier III compliance.

4. What control systems are supported?
The 6LY440 is compatible with YANMAR’s VC10 fly-by-wire system, joystick docking, and NMEA2000 integration.

5. Where can I purchase the YANMAR 6LY440?
You can buy it directly from Marine Inboard Specialists, an authorized distributor of genuine YANMAR marine diesel engines.

Why Buy from Marine Inboard Specialists?

At Marine Inboard Specialists, we deliver more than just engines—we deliver peace of mind. Here’s what you can expect:

• Certified YANMAR dealer with factory-backed warranties

• Expert consultation for vessel-specific engine selection

• Fast and secure international shipping

• Comprehensive after-sales support and parts availability

• Pre- and post-installation guidance for optimal performance

Contact Marine Inboard Specialists Today

Looking to upgrade your vessel’s powertrain with one of the most advanced diesel engines on the market? The YANMAR 6LY440 440HP Marine Diesel Engine is ready to meet the challenge. Contact Marine Inboard Specialists today for pricing, availability, and expert configuration support.