Changing Water Separating Fuel Filter - Mercury 350 Mag MPI Horizon Service Manual

CC1003

Changing Water Separating Fuel Filter

Be careful when changing water separating fuel filter. Gasoline is extremely flammable and highly
explosive under certain conditions. Be sure ignition key is OFF. Do not smoke or allow spark or open
flame in area when changing fuel filter. Wipe up any spilled fuel immediately.
Make sure no fuel leaks exist before closing engine hatch.
The electric fuel pump and factory installed water separating fuel filter have been carefully designed
to function properly together. Do not install additional fuel filters and/or water separating fuel filters
between fuel tank and engine.
Avoid Fire or Explosion: Fuel injection system is pressurized during operation. Use care when remov-
ing water separating fuel filter. Fuel could spray on hot engine causing fire or explosion. Allow engine
to cool down before attempting to remove the water separating fuel filter in the following procedure.
Also, hold a clean shop towel over the water separating fuel filter when removing it, to help avoid fuel
spraying on the engine.
The installation of additional fuel filters and/or water separating fuel filters may cause:
•
Fuel Vapor Locking
•
Difficult Warm-Starting
•
Piston Detonation Due to Lean Fuel Mixture
•
Poor Driveability
1
Remove water separating fuel filter and sealing ring from mounting bracket. Discard filter and sealing ring.
ENVIRONMENTAL HAZARD! Discharge of oil or oil waste into the environment is restricted by law. Do
not spill oil or oil waste into the environment when using or servicing your boat. Contain and dispose
of oil or oil waste as defined by local authorities.
2
Coat sealing ring on new water separating fuel filter with engine oil. Thread water separating fuel filter onto
bracket and tighten securely by hand. Do not use a filter wrench.
3
Start and operate engine. Check water separating fuel filter connection for gasoline leaks. If leaks exist, stop
engine immediately and recheck filter installation. If leaks continue, contact your Authorized Mercury
MerCruiser Dealer.
WARNING
WARNING
CAUTION
WARNING
CAUTION
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