A Yanmar diesel engine with exposed components and red branding on top.
A compact engine with various components and hoses attached.
A Yanmar diesel engine with exposed components and red branding on top.
A compact engine with various components and hoses attached.

6LF485 485HP

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SKU: web6lf481 Category:

Compact Six-Cylinder Power for Planing and Semi-Planing Vessels

The YANMAR 6LF485 is a 6.728 L marine diesel rated at 356 kW / 485 mhp at 3000 rpm, the entry point to the 6LF series, which covers 485 to 550 mhp. The 6LF is YANMAR’s compact and powerful common rail diesel engine, built for planing and semi-planing vessels in recreational and light-duty commercial use. It expands YANMAR’s line with higher horsepower, in the largest common rail, electronically managed marine diesel line-up in the industry. YANMAR built the series around five things: clean, interconnective, quiet, powerful and fuel efficient.

Powerful and fuel efficient. YANMAR’s proprietary fuel mapping and a larger mixing elbow deliver reliable, consistent output performance, with a power density of up to 82 mhp per liter on the 550 mhp model.

Clean and quiet. The 6LF485 meets EPA Tier 3 and EU RCD Stage 2 emissions regulations and provides a wide range of fuel compatibility to meet requirements for various government service applications, with noise reduction technology for quieter operation.

Interconnective. Direct connectivity to NMEA and J1939 CAN-bus networks gives smooth integration with any multi-function bridge display. The 6LF485 is controlled electronically by the YANMAR VC20 vessel control system, for up to three engines with four stations, and is available with the JC20A joystick for twin shaft-drive installations. It is offered for shaft drive with ZF280-1, ZF280-1A, ZF286 or ZF286A gears, with single- or 2-pole electrical installation and secondary alternator options for complex applications.

  • Powerful: 356 kW / 485 mhp at 3000 rpm, with proprietary fuel mapping and a larger mixing elbow for reliable output
  • Fuel efficient: optimized fuel consumption for longer journeys and cost savings
  • Clean: meets EPA Tier 3 and EU RCD Stage 2, wide fuel compatibility
  • Quiet: noise reduction technology for quieter operation
  • Interconnective: VC20 vessel control system for up to three engines with four stations; JC20A joystick for twin shaft drive
  • Shaft drive with ZF gears, 780 kg / 1720 lb dry weight without gear

Spec sheets

Manuals

Drawings

Specification Value
Rated output 356 kW / 485 mhp
Rated speed 3000 rpm
Configuration 6-cylinder in-line, 4-stroke, vertical, water-cooled diesel
Displacement 6.728 L / 411 cu. in
Bore x stroke 104 mm x 132 mm / 4.10 in x 5.20 in
Aspiration Turbocharged and intercooled
Fuel system Direct injection, Bosch common rail
Cooling Fresh water cooled, centrifugal pump; seawater by rubber impeller pump
Alternator 12 V, 90 A
Dry weight, without gear 780 kg / 1720 lb
Dry weight, with ZF280-1 gear 853 kg / 1881 lb
Dry weight, with ZF280-1A gear 853 kg / 1881 lb
Dry weight, with ZF286 gear 866 kg / 1909 lb
Dry weight, with ZF286A gear 857 kg / 1889 lb
Dimensions, L x W x H 1519 mm x 893 mm x 881 mm
Drive options Shaft (ZF280-1 / ZF280-1A / ZF286 / ZF286A gears)
Controls Electronic; VC20 vessel control system standard
Emissions compliance EU: RCD 2, EMC. US: EPA Tier 3, EPA Commercial, IMO Tier 2.

Shaft drive gears

For shaft-drive installations the 6LF485 is supplied with the marine gears below. All are hydraulic multi-disc gears. Other marine gearboxes and configurations are available on request; ask Mastry for the right match to your hull.

Gear Type Reduction ratios Gear dry weight
ZF280-1 Parallel As available from ZF 73 kg / 161 lb
ZF280-1A 7 degree down angle As available from ZF 73 kg / 161 lb
ZF286 Parallel As available from ZF 86 kg / 190 lb
ZF286A 7 degree down angle As available from ZF 77 kg / 170 lb
YANMAR VC20 vessel control system

VC20 vessel control system

YANMAR’s second-generation vessel control system for all electronically managed YANMAR engines. A J1939-based CAN-bus system with dedicated engine networks, a standard emergency back-up panel and NMEA connections for other onboard systems. Controls every engine and transmission function and displays engine alarms and diagnostic codes.

JC20A joystick, shaft drive

Inboard joystick control system for twin shaft-drive YANMAR common-rail engines, for powerboats and catamarans alike, in new installations or retrofit. Engages the bow thruster and adjusts engine speed for easy docking and maneuvering in tight waterways or marinas, with accurate, responsive and intuitive control.

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