Yanmar 6LY2M-WST 400HP Diesel Marine Engine

Unleash the Power of Precision Engineering on the Water

The Yanmar 6LY2M-WST Diesel Marine Engine is a true testament to Yanmar’s legacy of durability, innovation, and performance. Delivering an impressive 400 horsepower at 3200 RPM, this six-cylinder turbocharged inboard engine is designed for those who demand unwavering reliability and maximum efficiency on every voyage. Built to excel in both commercial and recreational marine environments, this powerhouse meets stringent IMO Tier 2 emission standards, combining strength, sustainability, and smooth operation in one compact unit.

Engineered for Excellence

Unmatched Performance and Reliability

The Yanmar 6LY2M-WST stands at the forefront of marine propulsion technology. It delivers 294 kW (400 HP) of consistent, vibration-free power, ensuring steady acceleration and long-term endurance, ideal for yachts, fishing vessels, and workboats that operate under continuous heavy loads.

Superior Fuel Economy

Equipped with an advanced direct injection combustion system and a precision in-line fuel pump, this engine maximizes every drop of diesel. The result is exceptional fuel efficiency, reduced operational costs, and dependable output across diverse marine conditions.

Eco-Friendly and IMO Tier 2 Certified

In compliance with IMO Tier 2 environmental regulations, the 6LY2M-WST minimizes harmful emissions without compromising performance. This makes it a future-ready choice for environmentally conscious operators who prioritize clean power and sustainability.

Turbocharged and Intercooled for Optimum Output

Its turbocharger and intercooler system ensure that the engine maintains peak performance, even under extreme conditions. Enhanced cooling promotes longevity and stable operation during prolonged, high-load applications.

Compact Power in a Lightweight Frame

Despite its robust performance, the Yanmar 6LY2M-WST remains remarkably compact and easy to install. Weighing only 535 kg (1179 lbs) (dry weight, without gear), it’s ideal for both new installations and repowering older vessels with limited space.

Globally Trusted Quality

Yanmar’s engines are synonymous with quality and endurance. Trusted worldwide, the 6LY2M-WST is manufactured under strict quality standards and comes with certified reliability for professional marine operations.

Technical Specifications

Comprehensive Product Overview

Designed for high-speed vessels and heavy-duty marine applications, the Yanmar 6LY2M-WST is a reliable propulsion system built for demanding operations. Its direct injection system ensures precise fuel metering for superior combustion, lower emissions, and reduced maintenance intervals. The turbo-intercooled configuration boosts performance while maintaining consistent temperature control — ensuring efficient operation hour after hour.

What’s Included in the Package

When you purchase your Yanmar 6LY2M-WST Diesel Marine Engine from JB Marine, you’ll receive a fully equipped setup that includes:

• Yanmar 6LY2M-WST Diesel Engine

• Integrated Turbocharger & Intercooler System

• 12V – 80A Alternator

• Fuel Pre-Filter with Water Separator

• Flexible Engine Mounts for Reduced Vibration

• Exhaust Mixing Elbow

• Mechanical Control System

• Belt Safety Guard

• Comprehensive User & Installation Manual

Optional Accessories for Enhanced Customization

Tailor your Yanmar 6LY2M-WST to meet the specific needs of your vessel with a selection of premium optional accessories:

• Custom Gearbox Configurations to match vessel design and speed requirements

• High-Riser Exhaust Mixing Elbow for specialized marine installations

• Onboard Spare Parts Kit for preventive maintenance

• Upgraded Alternator Options to increase electrical output

• Extended Wiring Harnesses for remote or large-engine-room setups

• Hot Water Kit with Fittings for improved onboard comfort and convenience

Warranty and Support

The Yanmar 6LY2M-WST Diesel Marine Engine is backed by a comprehensive 5-year manufacturer warranty, protecting your investment against defects in materials and workmanship.
With JB Marine, you also gain access to:

• Certified after-sales support

• Expert maintenance assistance

• Genuine Yanmar spare parts

We ensure that every customer enjoys long-term performance and peace of mind.

Ideal Applications

This versatile 400HP marine engine is suitable for a variety of vessels and marine operations, including:

• Luxury Yachts: Smooth, quiet propulsion for ultimate cruising comfort

• Commercial Workboats: Uninterrupted reliability for continuous operations

• Fishing Vessels: High torque for towing nets and carrying heavy catches

• Offshore Support Vessels: Engineered to perform in demanding offshore environments

Frequently Asked Questions (FAQs)

Which vessels are compatible with the Yanmar 6LY2M-WST?
It’s suitable for recreational yachts, fishing boats, workboats, and offshore support vessels of various sizes.

Is this engine fuel-efficient?
Yes. Thanks to its direct injection system and turbocharger, the 6LY2M-WST achieves excellent fuel economy, even under high load conditions.

Does it meet environmental standards?
Absolutely. The engine fully complies with IMO Tier 2 emissions regulations.

Can it be used to repower older boats?
Yes. Its compact and lightweight build makes it an excellent option for repowering or upgrading older vessels.

What’s included with the purchase?
The package includes the engine, turbocharger, alternator, exhaust elbow, mounting kit, and a detailed instruction manual.

What does the 5-year warranty cover?
It covers manufacturing defects and component workmanship, ensuring dependable long-term service.

Does JB Marine assist with installation?
Yes. We offer technical guidance, installation support, and spare parts for seamless integration.

Why Partner with Seawave Marine

JB Marine is your trusted partner for genuine Yanmar diesel engines and marine propulsion solutions. We pride ourselves on offering:

• Factory-authorized Yanmar engines and components

• Expert consultation to match your vessel’s exact needs

• Fast, secure shipping across Europe and beyond

• Ongoing after-sales support, maintenance, and servicing

Get in Touch Today

Experience dependable performance, superior fuel economy, and the trusted quality of Yanmar.
Contact JB Marine today for pricing, availability, and professional assistance in selecting the perfect propulsion system for your vessel.

Power your journey with the Yanmar 6LY2M-WST — where engineering precision meets marine excellence.