GENERAL SERVICE INFORMATION Engine Piping Diagrams ENGINE PIPING DIAGRAMS 4BY2 Figure 3-5 Fuel Flow (9) (10) (8) (15) (7) (11) (14) (2) (6) (4) (3) (12) (16) (1) (5) (13) 0006494 Figure 3-5 1 – Fuel Inlet from Tank 2 – Fuel Fine Filter 3 – Fuel Feed Pump 4 – Inlet Fuel Temperature Sensor 5 – High-Pressure Fuel Pump 6 – High-Pressure Fuel Supply Line 7 – High-Pressure Fuel Common Rail 8 – Fuel Injection Line 9 – Fuel Injector 10 – Fuel Injector Return Hose 11 – Common Rail Return Line 12 – Return Fuel Tee with Back Pressure Valve 13 – Return Fuel to Fuel Tank with Over Pressure Valve 14 – High-Pressure Fuel Rail Pressure Sensor 15 – High-Pressure Fuel Regulator (ECU-Controlled) 16 – Fuel Volume Regulator (ECU-Controlled) 3-8 BY Service Manual © 2009 Yanmar Marine International