5.6
Section 5
Fuel System and Governor
Disassembly
Figure 5-6. Carburetor - Exploded View.
1. Remove the bowl retaining screw, retaining screw
gasket, and fuel bowl.
2. Remove the bowl gasket, float shaft, float, and fuel
inlet needle.
3. Remove the low idle speed screw and spring. If
there is a low fuel adjusting needle without a limiter
cap, remove the needle and spring. Do not
attempt to remove the needle if it has a limiter cap.
Further disassembly to remove the welch plugs,
main fuel jet, fuel inlet seat, throttle plate and shaft,
and choke plate and shaft is recommended only if
these parts are to be cleaned or replaced.
Welch Plug Removal–Walbro Carburetors
In order to clean the idle ports and bowl vent
thoroughly, remove the welch plugs covering these
areas.
Use Tool No. KO1018 and the following procedure to
remove the welch plugs. See Figure 5-7.
1. Pierce the welch plug with the tip of the tool.
NOTE: To prevent damage to the carburetor, do
not allow the tool to strike the carburetor
body.
2. Pry out the welch plug with the tip of the tool.
Throttle Lever and Shaft
Choke Lever and Shaft
Choke Plate
Float
Float Shaft
Bowl Gasket
Fuel Bowl
Bowl Retaining Screw Gasket
Bowl Retaining Screw
Fuel Inlet Needle
Fuel Inlet Seat
Low Idle Fuel Adjusting
Needle and Spring (may not
be present or may have
limiter cap on certified
engines)
Low Idle Speed Adjusting
Screw and Spring
Throttle Plate Screw(s)
Throttle Plate
Dust Seal
Choke Return Spring
Fuel Shut-off Solenoid
or
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