Mercury MerCruiser GM V8 GM V8 454 CID 7.4L and 502 cid 8.2L Marine Engines Service Manual Number 23

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 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.
b
a
c
75657
a  - Screw (2)
b  - Idle Air Control (IAC) Valve
c  - Throttle Body
2.
3.
4.
5.
Install IAC valve in throttle body using screws. Torque to 20 lb-in. (2 Nm).
Place a new gasket between throttle body and adapter.
Install the throttle body on the adapter and torque the screws to 89 lb-in. (10 Nm).
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-51
Product Specification
CategoriesMercury MerCruiser Manuals
Tags,
Model Year1998, 1999, 2000, 2001
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Mercury MerCruiser GM V8 GM V8 454 CID 7.4L and 502 cid 8.2L Marine Engines Service Manual Number 23 SKU UPC Model
Matt on Apr 08, 2015.

Just need the manual. Wrote review. Can't technically review what I haven't seen yet...


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