2.
3.
4.
5.
6.
Label and then disconnect all fuel lines from cov-
er of vapor separator tank.
Diaphragm Assembly
Remove electrical line from retaining clip. (some
models)
REMOVAL
1.
Disconnect fuel pump electrical connector. (Elec-
tric fuel pump removed for visual clarity.)
Remove cover screws and remove cover and
electrical line retainer clip.
1
Remove float arm pin retaining fastener and re-
move float and needle assembly.
Disassemble float and needle assembly; i.e.,
float valve, float valve pin, clip and float.
a
CLEANING AND INSPECTION
Clean components with carburetor cleaner.
4
1.
7
3
IMPORTANT: Do not soak float or float valve in
carburetor cleaner.
5
2.
Inspect float valve seat for wear. Replace if nec-
essary.
2
3.
Inspect float and needle assembly; i.e., float
valve, float valve pin, clip and float. Replace parts
as necessary.
a
INSTALLATION
6
1.
Assemble float and needle assembly; i.e., float
valve, float valve pin, clip and float.
8
9
10
NOTE: Float is not adjustable.
2.
Install float and needle assembly and securefloat
arm pin using fastener.
12
11
3.
Apply Loctite 8831 to threads of cover screws.
Install cover and electrical line retainer clip and
tighten cover screws securely.
4.
5.
Secure electrical line in retainer clip.
Connect all fuel lines to cover of vapor separator
tank. Torque fuel line fittings to 23 lb. ft. (31 N·m).
72803
6.
7.
Connect fuel pump electrical connector.
a - A VST equipped with elbow fitting on top of VST
will have this configuration diaphragm and
spring.
WithengineOFF,cycleignitionswitchtoONwait-
ing for 2 seconds, and then OFF, waiting 10 se-
conds after each key off four times to prime the
fuel system and check for leaks.
1
2
3
4
5
6
7
8
9
- Electrical Connector
- Cover
- Lockwashers (6)
- Screws (6)
- Clip
- Spring
- Diaphragm
- O-Ring
NOTE: IF VST is dry. remove vent screw and fill with
fuel.
- Diaphragm Cover
10-
11-
12-
O-Ring
Screw
Lockwasher
Index
5C-144 - 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.
Could not find a copy until a search brought me here.
Excellent print.
Thank you