Section 4 - Maintenance
Page 42 90-8M0113856 eng DECEMBER 2015
2. Remove the IAC muffler from the slot in the air valve plate using needle‑nosed pliers.
a - IAC
b - IAC muffler location
3. Inspect the muffler for holes, cracks, or deterioration. Replace if damaged.
IMPORTANT: Do not use a cleaner that contains methyl ethyl ketone on the IAC or on electrical connections.
4. Clean the muffler with warm water and mild detergent. Replace if necessary.
5. Allow the IAC muffler to dry completely before use.
6. Install the IAC muffler.
Inspecting the Fuel Pump Sight Tube
The engine fuel pump sight tube gives you visual evidence of a fuel leak in the fuel pump diaphram. If fuel is ever visible in the
tube, see your authorized Mercury MerCruiser dealer to replace the fuel pump.
Fuel pump sight tube
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