The new 6LY takes the all the attributes of its forerunners and adds major engineering advances. The beating heart of the engine remains the international powerboat racewinning compact 5.8 -litre in-line six-cylinder YANMAR engine block that over three decades has cemented its popularity with boat designers, builders and owners who laud its performance, fuel efficiency, reliability and smooth and quiet operation.

This latest incarnation has taken the engine into a new era of mechanical and digital sophistication. We have completely re-engineered the fuel induction and aspiration systems - all functions now being managed by state-of-the-art electronic precision for even better all-round performance. We’ve replaced single injectors with a high-pressure common-rail fuel system to deliver exceptionally finely atomised fuel to the cylinders for better power-to-weight performance, fuel economy and smooth running.

IMPRESSIVELY CLEAN AND POWERFUL PERFORMANCE

Built on 30 years of history, the 4th generation 6LY is a smooth and robust 6 cylinder in-line engine, producing impressively clean and powerful performance.
Incorporating an advanced Denso common rail fuel injection system, the 6LY-CR delivers excellent fuel economy and significantly less noise than previous generations, while the high torque output throughout its full operating range produces class leading acceleration and responsive performance.
Its narrow and lightweight profile enables installation in the tightest of engine rooms, making it the perfect solution for repowering, as well as newly built vessels.

DETAILS

• Available in 2 output models – 400 and 440 mhp 
• A proven solution for jet and shaft drives 
• Controlled electronically by YANMAR VC10 Vessel Control System, with up to 4 stations 
• Available with JC20 joystick control for twin shaftdrive applications 
• Certified for recreational and light duty commercial applications 
• SOLAS option and USCG lifeboat approved

Specifications

• Rated Output : 294 kW / 400 mhp
• Rated Speed : 3300 rpm
• Displacement : 5.813 L / 354 cu. in
• No. of cylinders : 6 cylinders
• Cylinder Bore x Stroke : 106 mm x 110 mm / 4.17 in x 4.33 in
• Combustion system : Direct Injection, Denso Common Rail System
• Aspiration : Turbocharged & Intercooled
• Alternator : 12V - 125A
• Dry weight without gear : 585 kg / 1290 lbs
• Dimensions : 1440 mm x 748.5 mm x 773.8 mm
• Controls : Electronic
• Certifications : RCD 2 IMO Tier 2 EPA Tier 3 EPA Tier 3C BSO II EMC SOLAS

NOTE:

1 kW = 1.3596 mhp = 1.34102 bhp
Fuel condition: density at 15°C = 0.842 g/cm³
Technical data is according to (ISO 8665) / (ISO 3046)
Fuel temperature 40°C at the inlet of the fuel injection pump (ISO 8665)
Length measured with with KMH61A-2 gearbox & high-riser elbow
(Dimensions may vary with other gears/elbow)

Standard Engine Package

• Exhaust mixing elbow [L-type]
• Alternator 12V – 120A
• VC10 Vessel Control System
• Fresh water expansion tank

Optional Accessories

• High-riser mixing elbow [instead of L-elbow]
• Flexible mounts Barry
• Flexible mounts Bridgestone
• Secondary alternator 12V – 120A or 24V – 45A
• Extension harness [3m, 5m, 10m]
• Second station
• JC20 Inboard Joystick
• NMEA2000 Engine monitoring system
• SOLAS including Certificate [factory fit only]
• Hot water kit
• Water separator
• Lube oil drain pump
• Bilge pump [12V]