Mercury Racing HP525 EFI Bravo Sterndrive Series, Operation, Maintenance & Warranty Manual

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SPECIFICATIONS
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• Fuel permeation through rubber fuel lines.
• Starting and operating difficulties.
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
Low permeation fuel hose must be installed on all sterndrive
engine packages that are manufactured for sale, sold, or offered
for sale in the United States.
• The Environmental Protection Agency (EPA) requires that
any sterndrive engine package manufactured after January
1, 2009, must use low permeation fuel hose for the primary
fuel hose connecting the fuel tank to the engine.
• 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.
Crankcase Oil
OIL RECOMMENDATIONS
Preferred Oils API Classification
Mercury 4‑cycle Marine Engine Oil 25W‑40 SJ, CF‑2, CH‑4
Oil Filter Should Always Be Changed With Oil