Variable Geometry Turbo (VGT)

Mercury Diesel TDI engines are equipped with VGT turbo chargers. Variable guide vanes adjust the exhaust flow area and maximize exhaust flow efficiency throughout the rpm range. Turbo chargers provide optimum boost pressure over the entire rpm range and offer a smooth, powerful throttle response, while significantly improving combustion and fuel economy and reducing exhaust emissions.

Common Rail Technology

All Mercury Diesel engines utilize state of the art common rail fuel injection technology. Depending on the engine, the fuel pressure in the common rail can reach up to 26,000 psi. Common rail technology makes it possible to keep maximum combustion pressure under control. This technology offers more powerful, lower pressure combustion than conventional diesel engines for improved reliability. Common rail technology also makes it possible to optimize and control fuel injection to minimize fuel consumption. 

Direct Injection

All Mercury Diesel engines utilize direct injection or cylinder-direct injection technology where fuel is injected directly into the combustion chamber of each cylinder. The Mercury Diesel engines utilize injectors (nozzles) that are optimized and spray atomized high pressure fuel directly into the combustion chamber of each cylinder to ensure fuel consumption is minimized and adjusted to the engine load conditions. All Mercury Diesel engines use a dedicated BOSCH ECU to control the functionality of the injectors as well as the fuel pressure.

Closed Cooling

All Mercury Diesel engines come with a closed cooling system as a standard feature. Water is routed through highly efficient Mota heat exchangers to cool the engine, similar to an automotive application. The closed cooling design greatly improves longevity and durability and significantly extends the overall life of a diesel engine.