Troubleshooting Silent
Choice Exhaust Silencer
System
NOTE: Perform the following tests with engine(s) not
running.
Compressor will not run
1.
Testing mode switch (ignition switch in RUN posi-
tion).
a. Purple wire must have battery voltage. If not,
fuse is blown or wiring is faulty.
b. Brown wire must have battery voltage when
mode switch is held in THRU-TRANSOM po-
sition. If not, switch is faulty.
a
c. Gray wire must have battery voltage when
the mode switch is held in THRU-PROP posi-
tion. If not, switch is faulty.
2.
Testing air pump (ignition switch in RUN posi-
tion).
72533
a. Check that black wire, in terminal block, is
grounded to engine.
b. Brown wire in terminal block, must have bat-
tery voltage when mode switch is held in
THRU-TRANSOM position. If not, wiring is
faulty. If voltage is present, air pump is faulty.
Air pump runs - system inoperative
With air pump running, check hoses, fittings, sole-
noid, and relief valve for air leakage. Replace parts
as needed.
g
b
c
System operates but goes THRU-PROP after air
pump stops running
1.
2.
3.
Check that air pressure is not leaking past sole-
noid. If so, replace.
Check that air pressure is not leaking back
through air pump. If so, replace check valve.
Check that air pressure is not leaking at air cylin-
der assemblies. If so, replace faulty ones.
d
System stays in THRU-TRANSOM mode, will not
go back to THRU-PROP mode
Gray wire, in terminal block, must have battery volt-
age when mode switch is held in THRU-PROP posi-
tion. If not, wiring is faulty. If voltage is present, sole-
noid is faulty.
f
e
72534
a - Air Cylinder Assembly
b - Air Pump
c - Solenoid
d - Check Valve
e - Relief Valve
f - Air Intake Valve
g - Mode Switch
Index
90-823224--2 796
TROUBLESHOOTING - 1C-31
| 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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Excellent print.
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