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Mercury 300XS OptiMax User Manual

Mercury 300XS OptiMax
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STORAGE
90
13.Place the outboard in water or use the flushing attachment for
circulating cooling water. Start the engine and run at idle
speed for 5 minutes to allow the treated fuel to fill the fuel
system.
Protecting Internal Engine Components
NOTE: Make sure the fuel system has been prepared for storage.
Refer to Fuel System, preceeding.
IMPORTANT: Refer to Spark Plug Inspection and Replacement
for correct procedure for removing spark plug leads.
1. Remove the spark plugs and add approximately
30 ml (1 oz.) of engine oil into each spark plug hole.
2. Rotate the flywheel manually several times to distribute the oil
in the cylinders.
3. Re-install spark plugs.
Protecting External Outboard Components
Lubricate all outboard components listed in Maintenance -
Inspection and Maintenance Schedule.
Touch up any paint nicks. See your dealer for touch-up paint.
Spray Quicksilver or Mercury Precision Lubricants Corrosion
Guard on external metal surfaces (except corrosion control
anodes).
Tube Ref No. Description Where Used Part No.
120
Corrosion Guard
External metal
surfaces
92-802878-5
5
Gearcase
Drain and refill the gearcase lubricant (refer to Maintenance -
Gearcase Lubrication).
Positioning Outboard For Storage
Store outboard in an upright (vertical) position to allow water to
drain out of outboard.

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Mercury 300XS OptiMax Specifications

General IconGeneral
Engine Type2-Stroke
Horsepower300 HP
Alternator Output60 amp / 756 watt
Gear Ratio1.75:1
Starting SystemElectric
Fuel System2-Stage Direct Fuel Injection (DFI)
Weight505 lbs / 229 kg
Cylinders6
SteeringHydraulic
Shaft Length25"

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