Components; Fuel Lift Pump; Fuel Filter; Vapor Separator - Evinrude E-Tec 40 HP Service Manual

FUEL SYSTEM

COMPONENTS

COMPONENTS
The fuel syste m includes the following compo-
nents:

Fuel Lift Pump

•

Fuel Filter

•

Vapor Separator

•
Fuel Circulation Pump
•
Fuel Supply Manifolds
•
Fuel Injectors
•
Fuel Return Manifolds
•
Fuel Lift Pump
The fuel lift pump is a mechanical, pressure-pulse
pump. The diaphragm of the pu mp is driven by a
pulse hose that connect s to the cylinder/crank-
case assembly.
Fuel lift pump pulse hose location:
2-Cylinder Models: Number 2 cylinder
•
3-Cylinder Models: Number 3 cylinder
•
2-Cylinder models
1. Fuel lift pump
2. Pulse hose fitting
3-Cylinder models
1. Fuel lift pump
2. Pulse hose fitting
132
Vacuum from the fuel lift pump pulls fuel fro m the
fuel t ank. Once fu el reaches the pump, interna l
pump pressure force s the fuel from the pump
through the fuel filter and into the vapor separator.
Fuel Filter
The fuel filter protects the vapor separator and the
high-pressure components of the fuel system from
contaminants. Refer to INSPECTION AND MAIN-
TENANCE SCHEDULE on p. 16 for service fre-
quency.
1
1. Filter
Vapor Separator
1
The vapor separator:
Serves as a water-cooled fuel reservoir to accu-
•
mulate incoming fuel from the fuel lift pump and
2
from the fuel return manifold.
Contains a flo at con trolling the venting of fue l
•
vapors.
Contains a fu el pressu re regulator for t he hig h
•
006558 pressure fuel system.
1
2
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