Yanmar has recently launched its new V-12 engine, the 12AY.
The purpose-built 12AY is said to be ideal for commercial fishing craft, offshore support vessels, ferries, tugs, and other demanding applications, due to its easy installation and maintenance.
A key element of the improved performance and efficiency is a new staggered injection nozzle and patented combustion chamber design. They allow a very wide rpm range with low fuel consumption and emissions.
The 40L, 12-cylinder turbocharged diesel engine is available in five power ratings across three models. The 12AYM-WST models are available at 1,200mhp (882kW) at 1,850rpm and 1,400mhp (1,030kW) at 1,900rpm. The 12AYM-WET is available at 1,550mhp (1,140kW) at 1,840rpm and 1,659mhp (1,220kW) at 1,900rpm. The 12AYM-WGT produces 1,822mhp (1,340kW) at 1,940rpm.
A new V-cylinder block configuration offers improved rigidity compared to previous models, with inspection ports providing easy access to connecting rod assemblies. A mechanical engine governor control and Yanmar's own fuel system components further enhance reliability.
Compliant with the latest IMO Tier II emissions regulations, the 12AY series has type approval by the six major classification societies.
