Section 4 - Maintenance
Page 62 90-8M0113859 eng DECEMBER 2015
Water‑Separating Fuel Filter (MPI)
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.
!
CAUTION
Failure to release pressure from the fuel system will result in fuel spraying out, which can cause a fire or explosion. Allow the
engine to cool completely and release all fuel pressure before servicing any part of the fuel system. Always protect eyes and
skin from pressurized fuel and vapors.
Gen II Models
a - Fuel filter mounting bracket
b - Sealing ring
c - Fuel filter
Removal
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 the 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.
Installation
1. Coat the sealing ring on the new filter with engine oil.
Tube Ref No.
Description Where Used Part No.
80
SAE Engine Oil 30W Water-separating fuel filter sealing ring Obtain Locally
2. Thread filter onto the mounting bracket and tighten securely by hand. Do not use a filter wrench.
3. Open fuel supply valve, if equipped.
4. Ensure that the engine compartment is properly ventilated.
NOTICE
Without sufficient cooling water, the engine, the water pump, and other components will overheat and suffer damage. Provide
a sufficient supply of water to the water inlets during operation.
5. Supply cooling water to the engine.
6. Start the engine. Check for gasoline leaks around the fuel filter assembly. If leaks exist, stop the engine immediately.
Recheck the filter installation, wipe up any spilled fuel, and properly ventilate the engine compartment. If leaks continue,
stop the engine immediately and contact your authorized Mercury MerCruiser dealer.
a
b
c
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