General
MIE (Inboard)
7.4L
Code
XY
Rotation
Someoftherepairsinthissectionmustbecompleted
with engine removed from boat. Engine removal
depends upon type of repair and boat design. Place
engine on repair stand for major repairs.
7.4L EFI
UK
7.4L
MPI
UD
LH
8.2L
FH,HH
UA
When engine removal is not required, make certain
that battery cables are disconnected at the battery
prior to performing any on-board repair procedures.
454
EFI Ski
NOTE:Engines with a 6 or 7 preceding the block
code Gen VI engines. Example: 6XW would be a
7.4L Bravo.
Lubricate all moving parts (during reassembly) with
engine oil. Apply Quicksilver Perfect Seal on threads
of and under heads of cylinder head bolts, and on
threads of all cylinder block external bolts, screws
and studs.
Cylinder Head Identification
7.4L
Engine Identification
Gen V and VI Cylinder heads are identified by their
smaller and rounded intake ports.
The MerCruiser Model can be determined by looking
at the last two letters of the engine code stamped into
the cylinder block. This code number is stamped on
all MerCruiser power packages and replacement
partial engines, but not replacement cylinder block
assemblies.
If the engine serial number and/or model decals are
missing, the engine code letters may help in deter-
mining the engine models. Following is a list of GM
engines and their respective code letters.
72913
454
MAGNUM / 502 MAGNUM / 8.2L
Mark IV cylinder heads are identified by “HI PERF”
cast in the head under the rocker cover. Gen V and
VIcylinderheadsarebytheirlargerectangularintake
ports.
a
72312
a - Location Of GM Engine Code
MCM (Stern Drive)
Code
XW
Rotation
7.4L
7.4L
Bravo Three
UW,UB,XX
UJ
72914
7.4LX
7.4LX
454
EFI Bravo
MPI Bravo
Magnum
UC
LH
XA
454
Magnum MPI
UA
502
Magnum
FJ
502
Magnum MPI
FJ,HJ
Index
90-823224--2
796
454 CID (7.4L) / 502 CID (8.2L) - 3A-15
| 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