General; Carburetor Operation; Float System; Pilot Jet System - Ezgo 605586 Repair And Service Manual

Read all of Section B and this section before attempting any procedure. Pay particular attention to all Notes, Cautions and Warnings.

GENERAL

In the following text, there are references to removing/installing
bolts etc. Additional hardware (nuts, washers etc.) that are
removed must always be installed in their original positions
unless otherwise specified. Non-specified torque specifications
are as shown in the table contained in Section A.
The fuel system consists of a fuel tank, fuel lines, fuel fil-
ter, fuel pump and carburetor (Ref. Fig. 2 on Page H-2).
To prevent serious injury or death resulting
from a possible explosion, do not smoke near
the fuel tank or refuel near open flame or elec-
trical items which could produce a spark.
Always wear safety glasses while refueling
to prevent possible eye injury from gaso-
line or gasoline vapor.
When refueling, inspect the fuel cap for
leaks or breaks that could result in fuel
spillage.
Do not handle fuel in an area that is not
adequately ventilated. Do not permit any-
one to smoke in an area where vehicles
are being fueled.
Do not over fill the fuel tank. Allow adequate space for the
expansion of gasoline. Leave at least 1" (2.5 cm) space
below bottom of filler neck
The fuel tank is located under the seat, on the passen-
ger side of the vehicle (Ref. Fig. 1 on Page H-1). Fill
tank with fresh, clean, automotive grade, unleaded, 87
octane (minimum) gasoline. High altitude or heavy use/
load applications may benefit from higher octane gaso-
line.

CARBURETOR OPERATION

The carburetor consists of four different systems:
• float
• pilot jet
• main jet
• choke
.
Repair and Service Manual
FUEL
Fig. 1 Fuel Tank

Float System

The float chamber is located on the underside of the car-
buretor and the correct fuel level is maintained by
means of the float and needle valve.
As the fuel flows from the fuel pump it must pass
through the needle valve and into the float chamber. As
the fuel enters the float chamber, the float starts to rise
against the needle valve. When the buoyancy of the
float exceeds the fuel pressure on the needle valve, the
float closes the needle valve. The float is adjustable to
maintain the correct fuel level within the float chamber.
As fuel is consumed from the float chamber, the float
drops which allows the needle valve to admit additional
fuel.

Pilot Jet System

The pilot jet system function is to deliver fuel to the
engine during low speed operation. The fuel flow is
determined by the pilot jet size and the setting of the
pilot screw.

Main Jet System

The main jet system function is to deliver fuel to the
engine during acceleration and heavy load conditions.
Fuel flow is determined by the main jet size. Air is mixed
with fuel that passes through the bleed opening in the
main nozzle. This mixture passes into the carburetor
venturi as atomized air/fuel and is mixed with intake air
and delivered to the engine.

Choke System

The choke functions to make initial starting of the engine
easier in cold weather conditions. The choke plate
restricts the air flow into the carburetor which richens the
air/fuel ratio.
FUEL SYSTEM
1" MIN. (2.5 cm)
Page H-1