POSITIVE (+) RECTIFIER AND DIODES
6. Connect one lead of an ohmmeter (set on R x1)
to the common side of the diode and the other
lead to the other side, of one of the three diodes.
!
CAUTION
DO NOT use a test instrument with more than a
volt source (in the following test), as rectifier
may be damaged.
12
1.
Connect one lead of an ohmmeter (set on R x1
scale) to 1/4 in. stud on positive (+) rectifier heat
sink and the other lead to one of the rectifier ter-
minals. Note the meter reading.
2.
3.
Reverse leads and again note reading.
Meter should indicate a high or infinite resistance
(no meter movement) when connected one way
and a low reading when connected the other. If
both readings are high or infinite, rectifier is open.
If both readings are low, rectifier is shorted.
b
a
4.
Repeat Steps 1 through 3 for two other rectifiers
in heat sink.
72148
a - Common Side Of Diode Circuit Board
b - Repeat Test For Two Diodes
b
7. Reverse leads and again note reading.
8.
Meter should indicate a high or infinite resistance
(no meter movement) when connected one way
and a low reading when connected the other. If
both readings are high or infinite, diode is open.
If both readings are low, diode is shorted.
c
9.
Repeat Steps 6 through 8 for the other two
diodes.
10.
Replace rectifier assembly if any one of the
diodes is shorted or open.
a
72834
CONDENSER
a - Stud
b - Rectifier Terminal
c - Repeat Test Between These Terminals And Stud
1.
Using magneto analyzer and accompanying in-
structions, perform the following condenser
tests:
5.
Replace assembly if any one of the rectifiers is
shorted or open.
a. Condenser Capacity Test (must be .5 mfd).
b. Condenser Short or Leakage Test.
c. Condenser Series Resistance Test.
2.
Replace condenser if test results are not within
specifications.
Index
90-823224--2 796
CHARGING SYSTEM - 4C-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.
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