Yanmar 12AYM-WGT Diesel Engine

For Harmonious Living with Global Environment
Normally, when NOx emissions are reduced, the fuel consumption and smoke generation will increase, adversely affecting both the environment and management. As a solution to this, YANMAR has developed “Eco Diesel”, which is designed so as to comply with marine environmental protection. It improves the fuel consumption and smoke generation in addition to reducing NOx emissions.

Techniques for Complying with IMO Tier II Emission Standards : Exhaust Gas Recirculation (EGR)
In the 6AY engine, the internal EGR system is used. This design does not require any external control devices or any significant changes to the engine structure. In external EGR, the line of the engine and supercharger must be equipped with devices such as EGR solenoid valves and coolers, and control must be performed for them. But in internal EGR, these functions can be performed by controlling the lift of the intake and exhaust valve.

Performance
911hp ( 670kW ) at 1938rpm in the L operating mode Type Approval testing in the presence of the relevant Classification Societies was preceded, which involved 110% of maximum continuous rating (MCR). 6AYM-WGT was possible to demonstrate operation in the 110% MCR condition.

Good Fuel Economy together with Lower Emissions
The micro-sized multiple holes in the all-new injectors produce an even finer fuel-oil mist and combined with deep combustion chambers and new cylinder head shapes, produce even more power. It is power delivered smoothly, due to optimum combustion conditions being maintained across a far wider operating range. And it leads directly to the bonus of lower exhaust emissions and lower fuel consumption. The boost compensator dramatically reduces black smoke under hard acceleration.


PRINCIPAL DATA

- Number of Cylinder : 6
- Cylinder Bore : 155mm
- Stroke : 180mm
- Displacement [lit] : 20.379
- Combustion system : Direct injection
- Aspiration : Turbocharger+Intercooler

Specifications:

Rating : L
Rated Output [kW(mhp)/min-1] : 670(911)/1938
Starting system : Electric starting motor (24V 7.0kW)
Emission : IMO Tier II
Cooling system : Heat exchanger
Size of flywheel housing and flywheel : SAE #0 and 18 in.
Dry mass [kg] : 2365 (without marine gear)
Dimensions (L×W×H) [mm] : 2000mm × 1305mm × 1431mm


Marine Gear Specifications:

L-rating : Kanzaki YXH-240
Type : Hydraulic multi-disc clutch
Reduction ratio (Ahead) : 1.95 2.27 2.56 3.03 3.48
Direction of rotation (propeller shaft) : Clockwise or counterclockwise
Dry weight [kg] : 632 Kg

Package Includes:

- Yanmar 6AYM-WGT Engine 911 HP L-Rating
- Kanzaki YXH-240 Gearbox
- D-Type Instrument Panel
- Warranty Card