1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16

Prestolite 65 Amp Alternator
Replacement Parts Warning
Torque Specifications
Fastener Location
Housinhg Screws
Pulley Nut
In. Lb.   Ft. Lb.
N·m
5.6
55
!
WARNING
35-50
30
48-68
2.8
Front Bearing Screws
Alternator Mount
Adjustment Bolt
Electrical, ignition and fuel system components
on your MerCruiser are  designed and manufac-
tured to comply with U.S. Coast Guard Rules and
Regulations to minimize risks  of fire and explo-
sion.
35
48
16
28
V-Belt Tension (Note)
Depress 1/4 in. (13mm)
Use  of  replacement electrical,  ignition  or  fuel
system components, which do  not comply with
these rules and regulations, could result in a fire
or explosion hazard and should be avoided.
Description
The alternator has a rotor, which is supported in two
end frames by ball bearings, and is driven by a pulley
at approximately twice engine speed. The rotor con-
tains a  field winding  that is enclosed  between two
multiple-finger  pole pieces.  The  ends  of  the field
winding are connected  to two brushes (mounted in
the rear end  frame) which make continuous sliding
(or slipping) contact with  the slip rings. The current
(flowing through the field winding) creates a magnet-
ic field that  causes the adjacent fingers  of the pole
piecestobecomealternatenorthandsouthmagnetic
poles.
Specifications
Description
Excitation Circuit
Current Output
Specification
1.5 to 3.0 Volts
51 Amp. Min.
13.8 to 14.8 Volts
.5 MFD
Voltage Output
Condenser Capacity
Minimum Brush Length
3/16 in. (5 mm)
A 3-phase stator  is mounted directly  over the rotor
pole pieces and between two end frames. It consists
of  three windings  wound  120 degrees  electrically
out-of-phase on the inside of a laminated core. The
windings  are all  connected  together  on one  end,
while the other ends are connected to a full-wave rec-
tifier bridge.
Tools/Sealants
Description
Magneto Analyzer
Part Number
91-76032
Universal Puller Plate
Multi-Meter / DVA Tester
Quicksilver Liquid Neoprene
Ammeter (0-50 Amp.)
91-37241
The rectifier bridge contains  six rectifiers which are
arranged so that current flows from ground, through
the stator and to the output terminal, but not in the op-
posite direction.
91-99750
92-27511--2
Obtain Locally
When current is  supplied to the rotor  field winding,
andtherotoristurned,themovementofthemagnetic
fields created induces an alternating current into the
stator windings.  The  rectifier bridge  then changes
this alternating  current  to direct  current which  ap-
pears at the output terminal. A diode trio also is con-
nected to the stator windings to supply current to the
regulator and the rotor field during operation.
Voltage output of the alternator is controlled by regu-
lating the current supplied to the rotor field. This is ac-
complished by a transistorized voltage regulator that
senses the voltage at the  battery and regulates the
field current to maintain alternator voltage within pre-
scribed limits for properly charging the battery. Cur-
Index
90-823224--2  796
CHARGING SYSTEM - 4C-19
Product Specification
CategoriesMercury MerCruiser Manuals
Tags,
Model Year1993, 1994, 1995, 1996, 1997
Download File
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- 930 pages
Document File TypePDF
CopyrightAttribution 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.
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1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 SKU UPC Model
Nick on Aug 13, 2018. Exactly what I was looking for!

Hugely helpful service manual! Perfect. Thank you!


Sonthaya Traipug on May 04, 2018. Freelance Yachts Service

Manuals are all Important for Technician


Glenn on Dec 02, 2015. Nice

This book is invaluable if you do your own repairs. Great book.


Joseph on Oct 04, 2015. 1997 7.4l Bravo

Could not find a copy until a search brought me here.
Excellent print.
Thank you


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