Section 5 - Maintenance
Page 74
90-8M0074352
eng
OCTOBER 2012
2. Remove the IAC muffler from the slot in the plenum.
a -
IAC muffler
b -
Plenum
c -
IAC
3. Inspect the muffler for holes, cracks, or deterioration. Replace if damaged.
IMPORTANT: Do not use a cleaner that contains methyl ethyl ketone and do not use cleaner 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.
Changing the Positive Crankcase Ventilation Valve (PCV)
This engine is equipped with a positive crankcase ventilation valve (PCV). We recommend changing it every 100 hours of
operation or at least once a year, whichever occurs first.
1. Pull the PCV valve out of the intake manifold and remove the PCV valve from the hose.
a -
Hose from plenum to PCV valve
b -
PCV valve
2. Inspect the PCV valve and replace if necessary.
3. Install the PCV valve into the intake manifold.
4. Ensure that the PCV valve is tightly seated into the intake manifold.
We recommend the use of Mercury MerCruiser replacement parts.
Water‑Separating Fuel Filter
!
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.
a
b
c
44887
a
b
43215
