Cleaning The Iac Muffler - Mercury 350 MAG Manual

1. Remove the PCV valve from the port valve cover.
2. Disconnect the PCV valve from the hose and discard the valve.
3. Install a new PCV valve in the valve cover and reconnect the hose.
4. Ensure that the PCV valve is tightly seated in the valve cover.

Cleaning the IAC Muffler

Fuel is flammable and explosive. Ensure that the key switch is off and the lanyard is positioned so that the engine cannot start.
Do not smoke or allow sources of spark or open flame in the area while servicing. Keep the work area well ventilated and avoid
prolonged exposure to vapors. Always check for leaks before attempting to start the engine, and wipe up any spilled fuel
immediately.
NOTE: The IAC muffler may be installed in the throttle body or in the IAC adapter. Locate your IAC muffler by removing the engine
cover.
1. Remove the engine cover.
2. Remove the IAC muffler.
3. Inspect the IAC muffler for holes, cracks, or deterioration. Replace the IAC muffler if damaged.
IMPORTANT: Do not get cleaner on electrical connections and do not use cleaner containing methyl ethyl ketone.
4. Clean the IAC muffler with warm water and a mild detergent. Replace if necessary.
5. Allow the IAC muffler to dry completely, and then install.
90-8M0050539 MAY 2011
eng
a - PCV valve (hose not shown)
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WARNING
!
IAC muffler installed in the IAC adapter
Section 5 - Maintenance
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