Yanmar Marine International (YMI) will show its new range of common-rail fuel injected marine diesel engines rated for leisure marine and workboat applications at METS 2015, RAI Amsterdam, November 17 - 19.
Topping the bill of new inboards is its in-line six-cylinder is rated at 440 mhp at 3,300 rpm. This is the world marine-trade debut for the new unit, which will also be offered in a 400 mhp version and will go into full production early in 2016, YMI said.
Although new, the 6LY440 and 6LY400 have a pedigree derived from the mechanically controlled 6LY2A engine series, which during its nearly 20-year long production run was purchased by thousands of performance-cruiser owners around the world.
The new engines inherit their predecessors' narrow and lightweight block whose compact profile enabled it to be installed in small cramped engine rooms. Nearly all else is new, however. Single mechanical injector units are replaced by a Denso digitally-controlled common-rail fuel injection system with new pipe work designed to cope with higher injection pressures. The 24-valve cylinder head is all-new too, as is the inlet and exhaust manifold designed for optimal engine breathing and high torque output throughout the engine's operating range.
The electronically managed engine is also designed with all the benefits of plug-and-play operation, using Yanmar's Vessel Control System (VCS) which gives the options of wireless controls and fingertip low-speed maneuvering with the company's advanced joystick.
Other new common-rail diesel engines on the YMI stand include four-cylinder models from the company's electronic JH-CR series engine family. Launched early this year, these span the 45-110 mhp power range and are the smallest CR-injected inboard marine diesel engines on the market.
The common-rail theme on the YMI stand is rounded out with the 4.46-liter V8 diesel 8LV370Z with optional joystick control, which develops 370 mhp at 3,800 rpm and is mated with a Yanmar's own ZT370 stern-drive renowned for super-soft gear shifting with its specially-designed hydraulic clutch.
All engines on display meet the latest EPA Tier3 and upcoming EU RCD (2017) emissions requirements.