6LY400
The Yanmar 6LY400 is a 400 mhp (294 kW) 5.8-litre inline six-cylinder common-rail turbo diesel rated at 3300 rpm, the electronically controlled successor to the mechanical 6LY2A/6LY3 engines for planing motor yachts.
The 6LY400 and 6LY440 form Yanmar's 6LY-CR series, which Yanmar calls the fourth generation of its 6LY block. Shown at METS 2015 and in production from early 2016, they keep the 5.813-litre, 106 x 110 mm inline-six of the mechanically injected 6LY2A/6LY3 engines but add Denso common-rail injection, a redesigned 24-valve cylinder head and new manifolds. Both ratings share the same block, 3300 rpm rated speed and 585 kg dry weight; they replaced the 6LY3-UTP/STP/ETP generation and remained Yanmar's most powerful common-rail engines until the 6LF and 6LT arrived in 2020.
They are inboard engines for planing and semi-planing motor yachts, sport-fishing boats and light commercial craft. Yanmar's datasheet lists Kanzaki KMH61A2 (down-angle) and KMH61V2 (V-drive) gears and the ZF280-1 parallel gear, with other ZF gears on request, and the series page also mentions jet drives. Control is electronic through Yanmar's vessel control system (VC10/VC20 today), with the JC20 shaft-drive joystick as an option.
The 6LY400 is the lower of the two ratings.
Specifications
Power
- Power
- 400 hp
- Power (kW)
- 294 kW
- Rated speed
- 3300 rpm
Engine
- Configuration
- inline 6
- Cylinders
- 6
- Displacement
- 5.813 L
- Aspiration
- turbo, intercooled
- Weight
- 585 kg
- Fuel
- Diesel
- Mounting
- Inboard
Reviews
No independent reviews on file yet.
Sources
- 1. 6LY400 - YANMAR Marine International — Yanmar
- 2. 6LY-CR Series - YANMAR Marine International — Yanmar
- 3. 6LY400 / 6LY440 datasheet EN_DS6LY400/440_0717 — Yanmar
- 4. 6LY400 product page (yanmarmarine.com) — Yanmar
- 5. Yanmar common-rail 6LY diesels — Naucat
Specifications compiled from manufacturer sources.