GENERAL SERVICE INFORMATION
Principal Engine Specifications
12/05
BY Service Manual
3-21
© 2009 Yanmar Marine International
PRINCIPAL ENGINE SPECIFICATIONS
Engine Model 4BY2-150 / 150Z 4BY2-180 / 180Z 6BY2-220 / 220Z 6BY2-260 / 260Z
Application Design Models numbers with no suffix letter are used in marine gear applications.
Models having a “Z” suffix are used with stern drive.
Number of Cylinders In-line 4 In-line 6
Type 4-cycle diesel, 15° inclined, dual overhead camshaft
Combustion System Direct injection
Aspiration Turbocharger with charge air cooler
Bore x Stroke 84 mm x 90 mm (3.307 in. x 3.543 in.)
Displacement 1.995 L (121.7 cu in.) 2.993 L (182.6 cu in.)
Firing Order
*
1-3-4-2-1 1-5-3-6-2-4-1
Compression Ratio 16.5:1 16.5:1
Rated Power Output
**
4BY2-150 / 150Z 4BY2-180 / 180Z 6BY2-220 / 220Z 6BY2-260 / 260Z
Continuous Output (at 3600
rpm)
88 kW (114 hp) 102 kW (137 hp) 124 kW (166 hp) 153 kW (208 hp)
Maximum Output (at 4000 rpm) 110 kW (150 hp) 132 kW (180 hp) 162 kW (220 hp) 191 kW (260 hp)
Mean Pressure 1.66 MPa (240.76 psi) 1.98 MPa (287.2 psi) 1.62 MPa (234.96 psi) 1.92 MPa (278 psi)
Low Idle Speed (Warm Engine @
88°C [190°F])
***
750 rpm (ECU-controlled) 670 rpm (ECU-controlled)
Cold Start Speed
@ 20°C (68°F)
1200 rpm gradually decreasing to warm engine idle @ 88°C (190°F) (ECU-controlled)
High Idle Speed 4600 rpm
Rotation Direction Counterclockwise (viewed from flywheel)
No. of Valves per Cylinder 4
Valve Adjustment Hydraulic self-adjusting
Turbocharger MHI with pneumatic wastegate HOLSET with pneumatic wastegate
Charge Air Cooler Seawater cooled
Electrical System 12 V
Starter 12 V / 2 kW (2.7 hp)
Charging System 12 V / 150 A
Battery Capacity - Recommended 12 V / 85 Ah / 680 CCA (cold cranking amps)
Fuel Injection System Common rail (ECU-controlled)
Fuel Injection Pressure Variable depending on rpm; 250 to 1600 bar (3626 to 23,206 psi)
Injection Timing Variable (ECU-controlled)
ECU Threshold Voltage 7.8 V
Cooling System Closed cooling system with heat exchanger
Coolant Capacity
(Approximate)
10.0 L
(10.6 qt)
13.0 L
(13.7 qt)
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