Section 4 - Maintenance
90-8M0113859 eng DECEMBER 2015 Page 61
Changing
NOTE: We recommend the use of Mercury MerCruiser replacement parts to ensure compliance with emission regulations.
1. Remove the PCV valve from the port valve cover.
a - PCV valve (hose not shown)
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
!
WARNING
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.
IAC muffler installed in the IAC adapter—5.0 ECT shown, 4.3 ECT similar
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.
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