IMO TIER II IMO TIER III Inline-6

6AY

Yanmar 6AY-series • Overview and Specifications

	6AYM-WST	6AYM-WET		6AYEM-ET		6AYEM-WGT	6AYEM-GT
Rating	C	C	M	C	M	L	L	S	S
Number of cylinders	inline-6
Displacement (L)	20.379
Cylinder bore (mm)	155
Piston stroke (mm)	180
Rated output kW (rpm)	485 (1900)	555 (1840)	610 (1900)	555 (1840)	610 (1900)	670 (1938)	670 (1938)	737 (2000)	749 (200)
Combustion system	Direct injection
Aspiration	Turbocharger + intercooler
Cooling system	Heat exchanger
Starting system	Electric starting motor (24V 8.0kW)
Size of flywheel housing and flywheel	SAE #0 and 18 in.
Dry mass (kg) – without marine gear	2365	2365		2418		2365	2418

	6AYM-WST			6AYM-WET		6AYEM-ET	6AYEM-WGT	6AYEM-GT
Model	YX-181	YX180L	YXH-240L	YXH-240	YXH-240L	YXH-240-7	YXH-240	YXH-240-7
Type	Hydraulic multi-disc clutch
Reduction ratio [Ahead]	2.08 / 2.55 / 3.03	3.50 / 4.00 / 4.54	4.13 / 4.48 / 4.89 / 5.36 / 5.91 / 6.57 / 6.95	1.95 / 2.27 / 2.56 / 3.03 / 3.48	4.13 / 4.48 / 4.89 / 5.36 / 5.91 / 6.57 / 6.95	1.95 / 2.27 / 2.56 / 3.03 / 3.48	1.95 / 2.27 / 2.56 / 3.03 / 3.48	1.95 / 2.27 / 2.56 / 3.03 / 3.48
Direction of rotation [propeller shaft]	Clockwise or counterclockwise
Dry weight [kg]	560	680	1240	632	1240	632	632	632