GENERAL SERVICE INFORMATION
BY Service Manual
3-17
Principal Engine Specifications
PRINCIPAL ENGINE SPECIFICATIONS
Engine Model 4BY150 / 150Z 4BY180 / 180Z 6BY220 / 220Z 6BY260 / 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 15° inclined, water-cooled, dual overhead camshaft, 4-stroke diesel
Combustion System Direct injection
Aspiration Turbocharged with charge air cooler
Bore x Stroke 84 mm x 90 mm (3.307 in. x 3.543 in.)
Displacement 1.995 L (122 cu in.) 2.994 L (183 cu in.)
Firing Order* 1-3-4-2 1-5-3-6-2-4
Compression Ratio 16.5:1 16.5:1
Rated Power Output** 4BY150 / 4BY150Z 4BY180 / 4BY180Z 6BY220 / 6BY220Z 6BY260 / 6BY260Z
kW (metric hp) 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) 1.99 MPa (288.63 psi) 1.62 MPa (234.96 psi) 1.92 MPa (278.47 psi)
Torque 317 N·m (234 ft-lb) 355 N·m (262 ft-lb) 487 N·m (359 ft-lb) 545 N·m (402 ft-lb)
High Idle Speed 4600 rpm
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)
Rev Limit (fuel cut-off) 4600 rpm (ECU-controlled) 4600 rpm (ECU-controlled)
Prop rpm @ Wide Open
Throttle
4000 - 4100 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 / 74 Ah / 680 CCA
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
Maximum Allowable Exhaust
Backpressure
1835 mmAq
(72.3 in.Aq)
2039 mmAq
(80.3 in.Aq)
Cooling System Closed cooling system with seawater heat exchanger
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