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Mercury 350 MAG MPI User Manual

Mercury 350 MAG MPI
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53
CC927
Power Package Lay Up (continued)
EFI MODELS
WARNING
Avoid Fire or Explosion: Be sure engine compartment is well ventilated and no gasoline vapors are
present during the following operation.
WARNING
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.
1 Close the fuel shut-off valve, if equipped. If no fuel shut-off valve is present, a suitable method must be
employed to STOP the flow of fuel from the fuel tank to the engine before proceeding.
2 Allow engine to cool down.
3 Remove the water separating fuel filter.
4 Pour out a small amount of fuel into a suitable container, then add approximately 2 fluid ounces (60 ml) of
Quicksilver 2-Cycle Outboard Oil to fuel in the water separating fuel filter.
5 Reinstall water separating fuel filter.
6 Start the engine and check for fuel leaks. If leaks exist, stop the engine immediately. Recheck filter installation.
7 Start and operate engine at idle speed until the water separating fuel filter and fuel injection system are empty
and engine stops.
8 Refer to Flushing Cooling System and appropriately remove water supply to the seawater pickup pump.
9 After fuel system preparation, complete the following steps as appropriate for your model:
A Clean flame arrestor and crankcase ventilation hoses as outlined in Cleaning Flame Arrestor and Related
Components.
B Drain seawater section of cooling system as outlined in Draining Instructions.
C Lubricate all items outlined in Lubrication.
D Service batteries. Refer to manufacturers instructions.
E Clean outside of engine and repaint any areas required with Quicksilver Primer and Spray Paint. After paint
has dried, spray Quicksilver Corrosion Guard or wipe down with Quicksilver Storage Seal or SAE 20W
engine oil.

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Mercury 350 MAG MPI Specifications

General IconGeneral
Engine TypeV8
Horsepower300 HP
IgnitionElectronic
Alternator65 amp
Cylinders8
Displacement5.7 L
Fuel SystemMulti-Port Fuel Injection (MPI)
EmissionsEPA Certified

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