IMO

As almost every human social activity can be a cause of further deterioration of environment by air pollution and global warming, the search for solutions naturally requires broad international cooperation.
YANMAR is developing all our engines in harmony with the environment by
reducing NOx, CO2, SOx and other emissions, and taking antipollution measures.
Furthermore, YANMAR has been dedicated to developing its own leading-edge technologies and
products in pursuit of resource and energy efficiency. We have pursued the continuous improvement of
Life Cycle Value for the customer throughout a long product life by developing products that embody reliability, durability and low-cost operation.
YANMAR Power Solution, it's all for your business and the world of tomorrow.

IMO NOx Emission Limits

The pollution of the atmosphere by hazardous substances released from marine diesel engines has become a major global issue. The release of hazardous substances into the atmosphere by ships is regulated by the International Convention for the Prevention of Pollution from Ships (MARPOL 73/78). Annex VI: Prevention of Air Pollution from Ships was later passed in September 1997. As a result, the regulation of NOx emission levels began for marine diesel engines with a power of above 130kW on vessels built on or after January 1,2000. A further amendment was passed in October, 2008 and engines mounted in vessels built on or after January 1,2011 face even stricter Tier II regulations. Technological solutions have been developed to overcome these regulatory challenges including engine technologies, supplementary technologies and post processing technologies. Yanmar is addressing the stricter IMO Tier II regulation NOx limits with improvements to combustion technologies of engine.

IMO SOx Emission Limits

The regulations on NOx and SOx emissions continue to grow stricter. In special "Emission Control Areas" established by countries, the sulphur content of fuel oil used must be 0.1% or below after 2015. The limit of 0.1% sulphur content in fuel oil has already been in effect within the EU for vessels anchoring within a bay or traversing inland waterways since January 1,2010. YANMAR EcoDiesel has been modified to respond to low sulfur (low viscosity, low lubricity) fuels through alterations to the fuel system, etc.