SERVICE MANUAL NUMBER 23
MULTI-PORT FUEL INJECTION DISASSEMBLY AND REASSEMBLY
CLEANING AND INSPECTION
1.
Remove and discard sealing O-ring from IAC valve. Clean sealing surfaces, pintle valve
seat, and air passage with a carburetor cleaner to remove carbon deposits, being care-
ful not to push or pull on the IAC valve pintle. Force exerted on the pintle might damage
thewormdrive.DONOTuseacleanerthatcontainstheextremelystrongsolventmethyl
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.
INSTALLATION
IMPORTANT: If installing a new IAC valve, be sure to replace it with an identical part.
IAC valve pintle shape and diameter are designed for the specific application.
1.
Install new O-ring on IAC valve.
a
d
b
72800
c
a - Throttle Body
b - Idle Air Control (IAC) Valve
c - O-Ring
d - Screws
2.
3.
4.
Install IAC valve in throttle body using screws. Torque to 20 lb-in. (2 Nm).
Install throttle body, throttle linkage and flame arrestor as outlined in “ Throttle Body.”
Reset IAC valve pintle position as follows:
a. Turn ignition key ON for ten seconds.
b. Turn ignition key OFF for ten seconds.
c. Restart engine and check for proper idle operation.
Index
90-861326--1
MARCH 1999
Page 5C-31
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(1 votes, average: 5 out of 5)
Marine readers have rated Mercury MerCruiser GM V8 GM V8 454 CID 7.4L and 502 cid 8.2L Marine Engines Service Manual Number 23 5.0 out of 5.0 based on 1 product reviews. Just need the manual. Wrote review. Can't technically review what I haven't seen yet...