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FUEL PUMP UNIT CONSTRUCTION/OPERATION [L3 Turbo]

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## Fuel Pump Unit

• Mainly consists of a fuel filter, pressure regulator, fuel pump, fuel reservoir cup, suction filter, and jet pump.
• A pressure regulator has been built-in fuel pump unit due to the adoption of a returnless fuel system.
• A hard-plastic fuel pump unit, with an integrated fuel filter (top side) and fuel pump, has been adopted to simplify the fuel line.
• The fuel pump unit, located on top of the fuel tank, can be removed and installed through the service hole in the bottom of the rear seat.
• Fuel in the fuel reservoir cup is suctioned through the suction filter by the fuel pump, and pumped to the fuel filter. Return fuel is sent back to the fuel reservoir cup or send to jet pump.
• A venturi, located in the path of fuel returning from the pressure regulator, creates negative pressure that is used to transfer fuel from the reserve to the main tank.

## Pressure Regulator

• Built into the fuel pump unit due to the adoption of a returnless fuel system.
• Mainly consists of a spring, and diaphragm.