Oil Recommendation; Fuel Additives - Mercury 250 XS OptiMax Operation, Maintenance & Installation Manual

Fuel leakage is a fire or explosion hazard, which can cause serious injury or
death. Periodically inspect all fuel system components for leaks, softening,
hardening, swelling, or corrosion, particularly after storage. Any sign of
leakage or deterioration requires replacement before further engine
operation.
IMPORTANT: If you use gasoline that contains or might contain methanol or
ethanol, you must increase the frequency of inspection for leaks and
abnormalities.
IMPORTANT: When operating a Mercury Marine engine on gasoline containing
methanol or ethanol, do not store the gasoline in the fuel tank for long periods.
Cars normally consume these blended fuels before they can absorb enough
moisture to cause trouble; boats often sit idle long enough for phase separation
to take place. Internal corrosion may occur during storage if alcohol has
washed protective oil films from internal components.

Oil Recommendation

Recommended oil
Alternate oil
Mercury Racing 2‑Stroke Oil is recommended for OptiMax engines that are
used in applications of extreme loads associated with commercial, work, or
extended periods of high RPM. The added lubrication and protection properties
with Mercury Racing 2‑Stroke oil, maximizes engine horsepower while
protecting against heat, reduces wear and carbon deposit build‑up.
OptiMax DFI engine oil or Premium Plus 2‑Cycle Outboard Oil can be used as
an alternate oil.
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.

Fuel Additives

To minimize carbon deposit buildup in the engine, it is recommended to add
Mercury or Quicksilver Quickstor fuel stabilizer additive to the engine's fuel at
each tank fill throughout the boating season. Use additive as directed on
container.
FUEL AND OIL
WARNING
!
Mercury Racing 2‑Stroke Oil
OptiMax DFI engine oil
Premium Plus 2‑Cycle Outboard Oil
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