
133
FUEL SYSTEM
COMPONENTS
7
The vapor separator is serviced as an assembly
and includes the fuel circulation pump.
Fuel Reservoir
The vapor separator accumulates fuel in an inter-
nal fuel reservoir and supplies fuel to the electric
circulation p ump. It is water-cooled to e nhance
vapor separating capabilities.
Cooling
Water is use d to cool the f uel as it flo ws through
the vapor separator. Th e cooling passage of the
separator self-drains when the outboard is stored
Venting
The fuel vapor vent regulates fuel vapor pressure
in the reservoir.
The vapor separator vent is opened and closed by
a float valve. The float valve move s with the fuel
level in the fu el chamb er. Hot fuel causes an
increase in vapor pressure. This results in a lower
fuel le vel in th e va por separator. The float valve
drops and the vent opens. This allows fuel vapor
to flow t o the int ake manifold through the ve nt
hose.
As the vapor pressu re in the va por sep arator
decreases, the fuel level begins to in crease. An
increase in the fuel level raises the float valve and
the vent closes.
Pressure Regulator
The fuel pressure regulator helps maintain consis-
tent fuel pressure in the fuel system.
Fuel returning from the injecto rs ente rs the fue l
chamber o f t he vapor sep arator th rough a pres-
sure regu lator. The p ressure reg ulator ma intains
approximately 20 to 30 psi (138 to 207 kPa) of fuel
pressure in the high pressure side of the fuel sys-
tem.
Vapor Separator Assembly
1.
Circulation pump
006555
1.
Vent
005007
1
1
1.
Vent hose connection to intake
002180
1
Содержание E-Tec 40 HP
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