FUEL AND OIL
46
eng
The fuel demand valve has a manual release. The manual
release can be used (pushed in) to open (bypass) the valve in
case of a fuel blockage in the valve.
a -
Fuel demand valve ‑ installed
in the fuel hose between the
fuel tank and primer bulb
b -
Manual release
c -
Vent/water drain holes
Mercury Marine's Pressurized Portable Fuel Tank
Mercury Marine has created a new portable pressurized fuel tank
that meets the preceding EPA requirements. These fuel tanks
are available as an accessory or are provided with certain
portable outboard models.
SPECIAL FEATURES OF THE PORTABLE FUEL TANK
• The fuel tank has a two‑way valve which allows air to enter
the tank as the fuel is drawn to the engine, and also opens
to vent to the atmosphere if internal pressure in the tank
exceeds 34.4 kPa (5.0 psi). A hissing noise may be heard
as the tank vents to the atmosphere. This is normal.
• The fuel tank includes a fuel demand valve that prevents
pressurized fuel from entering the engine and causing a fuel
system overflow or possible fuel spillage.
• When installing the fuel tank cap, turn the cap to the right
until you hear a click. This signals that the fuel cap is fully
seated. A built‑in device prevents overtightening.
• The fuel tank has a manual vent screw which should be
closed for transportation and open for operation and cap
removal.
Since sealed fuel tanks are not openly vented, they will expand
and contract as the fuel expands and contracts during heating
and cooling cycles of the outside air. This is normal.
a
c
b
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