FUEL AND OIL
46 eng
IMPORTANT: Operating a Mercury Marine engine with gasoline
containing alcohol creates unique problems as a result of long
storage periods common to a boat. Cars normally consume
alcohol‑blend fuels before they absorb enough moisture to cause
problems; however, boats often sit idle long enough for phase
separation to occur. In addition, alcohol can wash protective oil
films from internal components causing corrosion.
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.
Low Permeation Fuel Hose Requirement
Required for outboards manufactured for sale, sold, or offered
for sale in the United States.
• The Environmental Protection Agency (EPA) requires that
any outboard manufactured after January 1, 2009 must use
low permeation fuel hose for the primary fuel hose
connecting the fuel tank to the outboard.
• Low permeation hose is USCG Type B1‑15 or Type A1‑15,
defined as not exceeding 15/gm²/24 h with CE 10 fuel at
23 °C as specified in SAE J 1527 ‑ marine fuel hose.
Oil Recommendation
Recommended Oil
Mercury OptiMax/DFI or Quicksilver DFI 2‑Cycle
Engine 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.
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