Yanmar 6LY2A-STP Diesel Marine Engine – 440HP Inboard Power by JB Marine GmbH
Germany’s trusted marine propulsion experts, JB Marine GmbH, proudly present the Yanmar 6LY2A-STP Diesel Marine Engine, a world-class inboard diesel engine designed for unmatched performance, reliability, and efficiency.
Delivering 440 horsepower at 3300 RPM, this 6-cylinder Yanmar engine is ideal for recreational yachts, commercial vessels, and offshore workboats that demand consistent power and long-term dependability.
Built with Yanmar’s legendary Japanese engineering and supported by JB Marine GmbH’s technical expertise in Germany, the 6LY2A-STP offers the perfect balance of fuel efficiency, durability, and compact design, making it the preferred choice for new builds and repowering projects alike.
Why Choose the Yanmar 6LY2A-STP Inboard Diesel Engine?
High-Performance Marine Power
The Yanmar 6LY2A-STP delivers 440HP (324 kW) at 3300 RPM, ensuring robust, smooth, and reliable propulsion for marine environments. Whether your vessel is a high-speed leisure yacht or a commercial workboat, this engine provides consistent torque and performance under demanding sea conditions.
Fuel Efficiency and Precision Engineering
Equipped with a direct injection system and an in-line fuel pump, the engine ensures precise fuel delivery and lower operating costs. This translates to optimal efficiency, reduced emissions, and longer engine life—key benefits for professional vessel operators and fleet owners.
Turbocharged Reliability
The turbocharger with intercooler system maintains exceptional engine temperature stability and efficiency under heavy loads. This allows the 6LY2A-STP to deliver superior performance across long voyages and high-output operations.
IMO Tier II Emissions Compliance
Meeting IMO Tier 2 emission standards, the Yanmar 6LY2A-STP ensures environmental responsibility without sacrificing performance. Optional IMO Tier III upgrade kits are available for customers operating under stricter emission regulations.
Compact, Lightweight, and Certified
At only 565 kg (1246 lbs) (without gearbox), this engine is both lightweight and compact, making it ideal for new installations and vessel repowering. It is also internationally certified by NK, ABS, BV, RINA, and CCS, confirming Yanmar’s global quality and safety standards.
Yanmar 6LY2A-STP Technical Specifications
| Specification | Details |
|---|---|
| Model | Yanmar 6LY2A-STP |
| Rated Output | 324 kW / 440 HP |
| Rated Speed | 3300 RPM |
| Displacement | 5.813 L / 354 cu. in |
| Cylinders | 6 in-line |
| Combustion System | Direct Injection, In-line Pump |
| Aspiration | Turbocharged & Intercooled |
| Alternator | 12V – 80A |
| Dry Weight (without gear) | 565 kg / 1246 lbs |
| Dimensions (L × W × H) | 1412 mm × 835 mm × 880 mm |
| Controls | Mechanical |
| Emission Certification | IMO Tier II |
| Warranty | 5 Years |
| Shipping | Global Shipping Available |
Precision-built for power and longevity, this Yanmar diesel engine represents decades of innovation and engineering excellence.
Complete Package from JB Marine GmbH
Every Yanmar 6LY2A-STP Marine Diesel Engine purchased from JB Marine GmbH comes complete with a full set of essential components and installation accessories.
Standard Package Includes:
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Genuine Yanmar 6LY2A-STP Engine
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Turbocharger + Intercooler Assembly
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Alternator (12V – 80A)
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Fuel Pre-Filter with Water Separator
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Flexible Engine Mounts
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Exhaust Mixing Elbow
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Mechanical Control System
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Belt Safety Cover
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Detailed User & Maintenance Manual
Each engine is tested and calibrated to Yanmar’s performance standards before delivery, ensuring turnkey readiness for your vessel.
Optional Accessories and Customization
Enhance your engine performance and vessel integration with optional upgrades available through JB Marine GmbH:
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Custom Gearbox Configurations
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High-Riser Exhaust Mixing Elbow
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Extended Wiring Harnesses (for remote setups)
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Onboard Hot Water Kits with Cocks
These accessories ensure your Yanmar 6LY2A-STP engine meets every operational requirement—from small yachts to industrial-scale marine projects.
Warranty and After-Sales Support
JB Marine GmbH provides industry-leading support with every Yanmar engine purchase.
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5-Year Manufacturer Warranty: Full coverage on parts and labor against defects.
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Extended Protection Plans: Available upon request for commercial applications.
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Expert Technical Support: Certified marine technicians ready to assist with installation and service.
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Genuine Spare Parts: Fast availability from JB Marine GmbH’s authorized Yanmar parts inventory.
We ensure every customer enjoys reliable performance, minimal downtime, and professional after-sales service.
Applications of the Yanmar 6LY2A-STP Marine Diesel Engine
The Yanmar 6LY2A-STP is designed for versatile marine applications, offering both power and efficiency for:
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Recreational Yachts: Smooth, responsive propulsion for leisure vessels.
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Commercial Workboats: Heavy-duty endurance and operational efficiency.
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Fishing Vessels: High torque output for towing, trawling, and hauling.
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Offshore Support Boats: Reliable performance for demanding offshore conditions.
From German shipyards to European commercial fleets, the 6LY2A-STP remains one of the most trusted and efficient marine diesel engines available.
Frequently Asked Questions (FAQs)
Which vessels are compatible with the 6LY2A-STP?
It’s ideal for yachts, commercial workboats, fishing boats, and offshore vessels requiring 400–450 HP propulsion systems.
How efficient is the engine?
With a direct injection system and an inline pump, it ensures maximum fuel efficiency and reduced operational costs.
Does it comply with marine emissions standards?
Yes, it meets IMO Tier II standards and can be upgraded to Tier III compliance.
Is it suitable for repowering?
Absolutely. Its lightweight and compact dimensions make it perfect for repowering older vessels.
What is covered by the 5-year warranty?
Defects in materials or workmanship, with full Yanmar support and replacement coverage.
Does JB Marine GmbH provide installation support?
Yes. Our certified team provides installation guidance, technical setup, and aftercare service across Germany and Europe.
Why Choose JB Marine GmbH as Your Yanmar Partner
As an authorized Yanmar dealer in Germany, JB Marine GmbH is recognized for excellence in marine engine supply, integration, and technical service.
What Sets Us Apart:
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100% genuine Yanmar marine engines & parts
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Factory-backed warranties and global certifications
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Expert advice for repowering and new installations
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Fast delivery across Germany and the EU
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Dedicated after-sales and spare parts service
We don’t just sell engines—we deliver marine propulsion solutions engineered for performance, longevity, and efficiency.
Contact JB Marine GmbH – Marine Diesel Experts in Germany
Upgrade your vessel with the Yanmar 6LY2A-STP 440HP Diesel Marine Engine, now available at JB Marine GmbH.
Contact our experts today for pricing, technical consultation, and availability.
