Oil Recommendation; Fuel Additives; Fuel Requirements - Mercury 150 Operation, Maintenance And 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
Mercury OptiMax/DFI or Quicksilver DFI 2‑Cycle Engine Oil is recommended
for your engine. If Mercury OptiMax/DFI or Quicksilver DFI 2‑Cycle Engine Oil
is not available, we recommend using Mercury or Quicksilver TC‑W3 Premium
Plus 2‑Cycle Oil. Severe engine damage may result from use of an inferior 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.

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 Requirements

Do not use premixed gas and oil in this engine. The engine automatically
receives extra oil during engine break‑in. Use a fresh supply of the
recommended gasoline during engine break‑in and after engine break‑in.
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FUEL AND OIL
WARNING
!
OptiMax Oil or Premium Plus 2‑Cycle TCW 3
Outboard Oil
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