Fuel Metering System
Components
FUEL SUPPLY COMPONENTS
Fuel is drawn from the boat’s fuel supply tank,
throughawaterseparatingfuelfilter,byamechanical
fuel pump mounted on and driven by a seawater
pump, and is delivered to the Vapor Separator Tank
(VST).
Multi-Port Vapor Separator Tank
(VST)
VAPOR SEPARATOR TANK (VST)
The fuel metering system is made up of the following
components:
An electric fuel pump located in the VST pumps fuel
to the fuel rail assembly. The pump is designed to
provide fuel at a pressure greater than that required
by the injectors. The pressure regulator, part of the
fuel rail assembly, regulates fuel pressure to the fuel
injectors. Unused fuel is returned to the VST.
•
Fuel supply components (fuel tank, mechanical
pump, lines, etc.).
•
•
•
Vapor Separator Tank (VST).
Fuel pump electrical circuit.
Fuel rail assembly, including:
Fuel injectors.
NOTE: MCM 454 Magnum Multi-Port with serial
number (0F130438) and MCM 502 Magnum Multi-
Port with serial number (0F128962) and higher will
be equipped with fuel lines as shown in figure A. Fuel
line shown in figure B is a replacement line per Ser-
vice Bulletin 93-26. If VST does not have style A or
B refer to to this service bulletin.
Pressure regulator assembly.
b
c
d
a
A
f
e
h
ENGINE
g
73054
B
Fuel Metering System
a - Mechanical Fuel Pump
b - Vapor Separator Tank (VST)
c - Electronic Control Module
d - Network Of Engine Sensors
e - Water Separating Fuel Filter
f - Fuel Pressure Regulator
g - Fuel Rail Assembly
73797
h - Fuel Tank
Index
5C-22 - ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY)
90-823224--2 796
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1993, 1994, 1995, 1996, 1997 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(4 votes, average: 4.5 out of 5)
Marine readers have rated 1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 4.5 out of 5.0 based on 4 product reviews. Hugely helpful service manual! Perfect. Thank you!
Manuals are all Important for Technician
This book is invaluable if you do your own repairs. Great book.
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