OUTBOARD INSTALLATION
eng 103
Some accessories not manufactured or sold by Mercury Marine
are not designed to be safely used with this outboard or outboard
operating system. Acquire and read the installation, operation,
and maintenance manuals for all selected accessories.
Fuel System
AVOIDING FUEL FLOW RESTRICTION
IMPORTANT: Adding components to the fuel supply system
(filters, valves, fittings, etc.) may restrict the fuel flow. This may
cause engine stalling at low speed, and/or a lean fuel condition
at high RPM that could cause engine damage.
ELECTRIC FUEL PUMP
The fuel pressure must not exceed 28 kPa (4 psi). If necessary,
install a pressure regulator.
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.
EPA PRESSURIZED PORTABLE FUEL TANK
REQUIREMENTS
The Environmental Protection Agency (EPA) will require portable
fuel systems that are produced after January 1, 2011 for use with
outboard engines to remain fully sealed (pressurized) up to
34.4 kPa (5.0 psi). These tanks may contain the following:
• An air inlet that opens to allow air to enter as the fuel is
drawn out of the tank.
• An air outlet that opens (vents) to the atmosphere if
pressure exceeds 34.4 kPa (5.0 psi).
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