SERVICE MANUAL NUMBER 24
Idle Air Control (IAC) Valve
REMOVAL
FUEL INJECTION DISASSEMBLY AND REASSEMBLY
1.
2.
Remove flame arrestor, throttle cable and throttle body.
Disconnect electrical connector at idle air control (IAC) valve.
b
b
a
a
75788
75788
Earlier Style Throttle Body
Later Style Throttle Body
a - Idle Air Control (IAC) Valve Connector
b - Screws
3.
Remove IAC from throttle body.
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
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.
INSTALLATION
IMPORTANT: If installing a new IAC valve, be sure to replace it with the correct IAC
valve pintle shape and diameter are designed for the specific application.
1.
Install new O-ring on IAC valve.
a
b
75784
a - Idle Air Control (IAC) Valve
b - O-Ring
90-861327--1
OCTOBER 1999
Page 5E-43
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 305 CID, Mercury MerCruiser 350 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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