Idle Air Control (IAC) Valve
INSTALLATION
IMPORTANT: If installing a new IAC valve, besure
to replace it with an identical part. IAC valve
pintle shape and diameter are designed for the
specific application.
NOTICE
Refer to “Service Precautions,” in “Repair
Procedures,” BEFORE proceeding.
1.
Install new O-ring on IAC valve.
REMOVAL
1.
Remove flame arrestor, throttle cable and throttle
body as outlined in “Throttle Body.”
2.
Disconnect electrical connector at idle air control
(IAC) valve.
a
a
d
b
c
72800
a - Throttle Body
b - Idle Air Control (IAC) Valve
c - O-Ring
d
b
d - Screws
c
2. Install IAC valve in throttle body using screws.
Torque to 20 lb. in. (2 N·m).
72800
a - Throttle Body
b - Idle Air Control (IAC) Valve
c - O-Ring
3.
Install throttle body, throttle linkage and flame ar-
restor as outlined in “ Throttle Body.”
d - Screws
4.
Reset IAC valve pintle position.
3.
Remove IAC from throttle body.
a. Turn ignition key ON for ten seconds.
b. Turn ignition key OFF for ten seconds.
CLEANING AND INSPECTION
c. Restart engine and check for proper idle op-
eration.
1.
Remove and discard sealing O-ring from IAC
valve. Clean sealing surfaces, pintle valve seat,
and air passage with a carburetor cleaner to re-
move carbon deposits, being careful not to push
or pull on the IAC valve pintle. Force exerted on
the pintle might damage the worm drive. DO NOT
use a cleaner that contains the extremely strong
solvent methyl ethyl ketone.
NOTE: Shiny spots on the pintle, or seat, are normal
and do not indicate misalignment or a bent pintle
shaft.
2.
Inspect the entire assembly for any obvious
physical damage.
Index
5C-180 - 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.
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