Yanmar 4BY2 Operation Manuals

Also see for 4BY2: Service manual

Contents

Engine Model 4BY2-150 /150Z4BY2-180 /180Z6BY2-220 /220Z6BY2-260 /260ZFuel 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 VCooling System Closed cooling system with seawater heat exchangerCoolant Capacity (Ap-proximate)10 L (10.6 qt) 13 L (13.7 qt)Seawater Pump Rubber impeller, belt drivenCapacity 165 L/min at maximum ratingMaximum Lift 2000 mm (78.75 in.)Hydraulic Oil Cooler Seawater cooledLubrication System Totally enclosed, forced lube systemOil Cooler Engine coolant systemEngine Oil Pressure at4000 rpm3.5 - 6.0 bar (51 - 87 psi)Engine Oil Pressure at1000 rpm0.6 - 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 filterDrive OptionsStern Drive ZT350 or MerCruiser Bravo-1, -2, -3Marine Gear KMH40 or KMH50 KMH50Operational AnglesContinuous 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 enginemount)736.5 mm (30.0 in.) 942 mm (37.1 in.)Marine Gear (front-to-marine gear mountingface)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)SPECIFICATIONS72 BY Series Operation Manual© 2008 Yanmar Marine International