132
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
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.
Vapor Separator
The vapor separator:
• Serves as a water-cooled fuel reservoir to accu-
mulate incoming fuel from the fuel lift pump and
from the fuel return manifold.
• Contains a flo at con trolling the venting of fue l
vapors.
• Contains a fu el pressure regulator for t he hig h
pressure fuel system.
2-Cylinder models
1. Fuel lift pump
2. Pulse hose fitting
006558
3-Cylinder models
1. Fuel lift pump
2. Pulse hose fitting
002314
1. Filter 002145
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