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Mercury 300XS OptiMax User Manual

Mercury 300XS OptiMax
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FUEL AND OIL
41
!
CAUTION
When operating a Mercury engine with fuel containing alcohol,
avoid storing the fuel in the fuel tank for long periods of time. Long
storage periods, common to boats, create unique problems. In
cars, alcohol-blend fuels are normally consumed before they can
absorb enough moisture to cause trouble. However, boats often
sit idle long enough for phase separation to take place. In
addition, internal corrosion may take place during storage if
alcohol has washed protective oil films from internal
components.
IMPORTANT: Because of possible adverse effects of alcohol in
gasoline, it is recommended that only alcohol-free fuel be used
where possible.
If only fuel containing alcohol is available, or if the presence of
alcohol is unknown, increased inspection frequency for leaks and
abnormalities is required.
Oil Recommendation
Recommended Oil Premium Plus 2-Cycle TC-W3 Outboard Oil
TC-W3 Premium Plus Outboard Oil is a higher grade oil that
provides increased lubrication and extra resistance to carbon
buildup when used with good or varying grades of gasoline.
IMPORTANT: Oil must be NMMA certified TC-W3 2-Cycle oil.
Periodically consult with your dealer to get the latest gasoline and
oil recommendations. If Quicksilver 2-Cycle Outboard Oil is not
available, substitute another brand of 2-Cycle outboard oil that is
NMMA Certified TC-W3. The use of an inferior 2-Cycle outboard
oil can reduce engine durability. Damage from use of inferior oil
may not be covered under the limited warranty.
Filling Remote Oil Tank
Remove filler cap and fill with the specified oil. Oil tank capacity
is 11.5 liters (3 gallons). Replace filler cap and tighten securely.

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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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