Changing Water Separating Fuel Filter - Mercury MerCruiser Tow Sport 5.7 LHS Manual

Section 5 - Maintenance
1. Remove the PCV valve from the port valve cover.
a
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 the PCV valve is tightly seated in the valve cover.

Changing Water Separating Fuel Filter

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.
1. Allow the engine to cool down.
NOTE: Mercury MerCruiser recommends that the engine be shut off for 12 hours prior to filter removal.
2. Close fuel supply valve, if equipped.
3. Wrap the water separating fuel filter with a cloth to help catch any fuel spills or spray.
4. Remove and discard the water separating fuel filter and sealing ring from the mounting bracket.
5. Coat the sealing ring on the new filter with engine oil.
Tube Ref. No.
6. Thread filter onto bracket and tighten securely by hand. Do not use a filter wrench.
7. Open fuel supply valve, if equipped.
8. Supply cooling water to the engine.
9. Start the engine. Check for gasoline leaks around the fuel filter assembly. If leaks exist, stop the engine immediately.
Recheck the filter installation, clean spilled fuel and properly ventilate the engine compartment. If leaks continue, stop
engine immediately and contact your authorized Mercury MerCruiser dealer.
Page 48
Description
Synthetic Blend MerCruiser Engine Oil
SAE25W‑40
a
a - Fuel filter base
b - Sealing ring
c - Fuel filter
b
c
6527
a -
b -
b
mc71925-1
WARNING
!
Filter sealing ring
PCV valve
Hose
Where Used
92‑883725K01
90-8M0086943 DECEMBER 2014
eng
Part No.