Yanmar 6LF550 Inboard Diesel Engine

Introducing the Yanmar 6LF550 Inboard Diesel Engine—a compact, high-performance solution tailored for planing and semi-planing vessels in both recreational and light-duty commercial sectors. This advanced engine integrates Yanmar’s proprietary fuel mapping and a larger mixing elbow, ensuring consistent and reliable output.

Key Features:

• Versatile Application: Ideal for large superyacht tenders, motor yachts up to 55 feet, and light-duty commercial vessels.
• Optimal Power-to-Weight Ratio: Delivers a high power density of 82 mhp/L, providing robust performance without added bulk.
• Advanced Control System: Managed by the Yanmar VC20 Vessel Control System, offering seamless integration with NMEA and J1939 CAN-bus networks for enhanced operational control.
• Environmental Compliance: Surpasses EPA Tier 3 and EU RCD Stage 2 emissions regulations, promoting eco-friendly operation.

Specifications:

• Rated Output: 404 kW / 550 mhp
• Rated Speed: 3000 rpm
• Displacement: 6.728 L / 411 cu. in
• Number of Cylinders: 6
• Cylinder Bore x Stroke: 104 mm x 132 mm (4.10 in x 5.20 in)
• Configuration: In-line, 4-stroke, vertical, water-cooled diesel engine
• Combustion System: Direct Injection, Bosch Common Rail System
• Aspiration: Turbocharged & Intercooled
• Alternator: 12V – 90A, 24V – 70A
• Dry Weight (without gear): 780 kg / 1720 lbs
• Dimensions (L x W x H): 1519 mm x 893 mm x 881 mm
• Controls: Electronic
• Certifications: RCD 2, IMO Tier 2, EPA Tier 3, EMC

Standard Engine Package Includes:

• High-riser exhaust mixing elbow
• 12V Electric system (single pole) / 24V Electric system (2-pole)
• Flexible mounts
• Alternator (12V – 90A / 24V – 70A)
• VC20 Vessel Control System
• Electronic CAN-bus control head
• Backup panel
• Manual lubrication oil evacuation pump

Optional Accessories:

• Secondary alternator (24V – 110A with smart regulator)
• Secondary alternator (12V – 125A or 24V – 65A [2-pole])
• Additional station setups
• Front-PTO connection
• Hot water connector
• NMEA 2000 Engine monitoring system
• JC20A Inboard Joystick
• Extension harnesses (3m, 5m, 10m)
• Man Overboard Switch

Warranty Information:

• 5-year warranty

Frequently Asked Questions:

Q: What types of vessels are compatible with the Yanmar 6LF550 engine?

A: The Yanmar 6LF550 is suitable for large superyacht tenders, planing and semi-planing motor yachts up to 55 feet, and light-duty commercial vessels.

Q: How does the VC20 Vessel Control System enhance engine operation?

A: The VC20 system provides advanced electronic control, allowing for seamless integration with vessel systems and improved operational efficiency.

Q: What are the environmental compliance standards met by the 6LF550 engine?

A: The engine exceeds EPA Tier 3 and EU RCD Stage 2 emissions regulations, ensuring eco-friendly performance.

For more detailed information, refer to the Yanmar 6LF550 product page.