Mercury 150 EFI Service Manual page 627

150/175/200 EFI Oil & Fuel Flow 2002 Model Year
1. Fuel inlet from primer bulb
2. Engine Pulse Fuel Pump
3. Fuel line to Water Separating Fuel Filter - 2-8 psi (14-55 kPa)
4. Water Separating Fuel Filter in Vapor Separator Tank (VST) Assembly
5. Fuel outlet from Needle and Seat
6. Fuel Level Float in VST
7. Pulse Pressure from Cylinder Block
8. On-Board Oil Tank
9. Check Valve in Outlet Hose from Oil Tank
10. Outboard Oil Tank
11. Oil Inlet Hose to Electronic Oil Pump
12. Electronic Oil Pump
13. Oil Outlet Hose from Oil Pump to VST
14. Oil is Mixed with Gas in VST
15. Gas/Oil Mixture is Drawn into High Pressure Fuel Pump
16. Fuel Drain
17. High Pressure Fuel Pump
18. Schrader Valve
19. Fuel Passage to Fuel Regulator
20. Fuel Regulator
21. Ambient Air Pressure
22. Fuel Blow-Off from Fuel Regulator to VST
23. In-Line Fuel Filter
24. High Pressure Fuel Line to Reed Valve Plate Assembly
25. Reed Valve Plate Assembly
26. Fuel Rail Assembly
27. Fuel Injectors