Mercury 150 EFI Service Manual page 257

Electric Fuel Pump Inlet Filter Check and De-Pressurizing EFI System
Procedures
Purpose: Checking the inlet filter for obstructions, damage etc. eliminates this component as a possible
source of restriction in the system.
1. De-pressurize EFI fuel system by wrapping a clean cloth around pressure port valve
and inserting tip of screwdriver into valve, depressing valve core. Let fuel drain from
valve.
a -
2. Remove drain plug from vapor separator and allow fuel to drain into suitable container.
90-883728 JULY 2001
a
b
Pressure Port
FUEL INJECTION
58873
b - Drain Plug
58891
Page 3B-25