Engine Model 4BY2-150 /
150Z
4BY2-180 /
180Z
6BY2-220 /
220Z
6BY2-260 /
260Z
Fuel Injection System Common rail (ECU-controlled)
Fuel Injection Pressure Variable depending on rpm; 250 - 1600 bar (3626 - 23,206 psi)
Injection Timing Variable (ECU controlled)
ECU Threshold Voltage 7.8 V
Cooling System Closed cooling system with seawater heat exchanger
Coolant Capacity (Ap-
proximate)
10 L (10.6 qt) 13 L (13.7 qt)
Seawater Pump Rubber impeller, belt driven
Capacity 165 L/min at maximum rating
Maximum Lift 2000 mm (78.75 in.)
Hydraulic Oil Cooler Seawater cooled
Lubrication System Totally enclosed, forced lube system
Oil Cooler Engine coolant system
Engine Oil Pressure at
4000 rpm
3.5 - 6.0 bar (51 - 87 psi)
Engine Oil Pressure at
1000 rpm
0.6 - 1.0 bar (8.7 - 14.5 psi)
Engine Oil Capaci-
ty****
8.0 L (8.5 qt)*****
11.0 L (11.5 qt)
*****
Crankcase Ventilation Closed, with filter
Drive Options
Stern Drive ZT350 or MerCruiser Bravo-1, -2, -3
Marine Gear KMH40 or KMH50 KMH50
Operational Angles
Continuous Front-to-Rear: -5 to 20°, Side-to-Side: 20°
Peak Front-to-Rear: -5 to 25°, Side-to-Side: 30°
Height 721 mm (28.4 in.)
Length (without marine gear)
Stern Drive (front-to-
middle of engine
mount)
736.5 mm (30.0 in.) 942 mm (37.1 in.)
Marine Gear (front-to-
marine gear mounting
face)
644 mm (25.4 in.) 827.5 mm (32.6in.)
Overall Length 839.2 mm (33.0 in.) 1001 mm (39.4 in.)
Width 670 mm (26.4 in.) (local exceeding)
SPECIFICATIONS
72 BY Series Operation Manual
© 2008 Yanmar Marine International
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