Mercury MERCRUISER Service Manual

Fuel System
Section 5A - MPI ECT Fuel System
Table of Contents
Precautions........................................................................ 5A-2
Fuel Pressure Specifications............................................. 5A-3
Fuel Requirements.............................................................5A-3
Fuel Ratings................................................................5A-3
Using Reformulated (Oxygenated) Gasoline (USA
Only)........................................................................5A-3
Gasoline Containing Alcohol.......................................5A-4
Priming the Fuel System....................................................5A-4
Alternate Priming Procedure for Fuel System ...................5A-4
Fabricating a Pressure‑Relief Collection Tool............ 5A-4
Priming the Fuel System.............................................5A-6
Important Information.........................................................5A-7
Low Permeation Fuel Lines........................................ 5A-7
Fuel Supply Connections............................................5A-8
Exploded Views................................................................. 5A-8
Fuel Rail Exploded View.............................................5A-8
Throttle Body.............................................................. 5A-9
Fuel System Module................................................... 5A-9
Fuel System..................................................................... 5A-10
Fuel Delivery System................................................5A-10
Anti‑Siphon Valve..................................................... 5A-10
Fuel Supply Module (FSM).............................................. 5A-10
FSM Removal........................................................... 5A-10
FSM Disassembly.....................................................5A-11
FSM Assembly..........................................................5A-15
Throttle Body....................................................................5A-22
Throttle Body Removal............................................. 5A-22
Throttle Body Cleaning and Inspection.....................5A-22
Throttle Body Installation.......................................... 5A-23
Fuel Rail...........................................................................5A-23
Removal....................................................................5A-23
Installation.................................................................5A-27
Fuel Rail Pressure Damper..............................................5A-29
Wire Color Code Abbreviations................................ 5A-29
Fuel Injector Wiring Diagram........................................... 5A-29
Troubleshooting............................................................... 5A-30
Fuel Pressure Gauge Setup and Use.......................5A-30
Checking for Restrictions/Vapor Lock Problems in
Fuel Delivery Systems.......................................... 5A-31
Equipment Used to Test Fuel RVP, Fuel
Temperature, or Fuel System Vacuum................. 5A-32
MPI ECT Fuel System
90-8M0099748 eng DECEMBER 2015 © 2016 Mercury Marine Page 5A-1
5
A

Mercury MERCRUISER Specifications

General

Brand	Mercury
Model	MERCRUISER
Category	Engine
Language	English