5.8
Section 5
Fuel System and Governor
Welch Plug Installation
Use SPX Tool No. KO1017 and install new plugs as
follows:
1. Position the carburetor body with the welch plug
cavities to the top.
2. Place a new welch plug into the cavity with the
raised surface up.
3. Use the end of the tool that is about the same size
as the plug and flaen the plug. Do not force the
plug below the surface of the cavity. See Figure
5-9.
• Throle plate, choke plate, throle sha, and
choke sha.
NOTE: Do not submerge the carburetor in
cleaner or solvent when plastic, fiber,
rubber, foam seals or gaskets are
installed. The cleaner may damage these
components.
Inspection
Carefully inspect all components and replace those
that are worn or damaged.
• Inspect the carburetor body for cracks, holes, and
other wear or damage.
• Inspect the float for cracks, holes, and missing or
damaged float tabs. Check the float hinge and pin
for wear or damage.
• Inspect the fuel inlet needle and seat for wear or
damage.
• Inspect the tip of the low idle fuel adjustment
needle for wear or grooves.
• Inspect the throle and choke sha and plate
assemblies for wear or excessive play.
Repair
Always use new gaskets when servicing or
reinstalling carburetors. Repair kits are available
which include new gaskets and other components.
Always refer to the Parts Manual for the engine being
serviced to ensure the correct repair kits are ordered.
Reassembly
Choke Shaft Installation
1. Install the choke return spring to the choke sha.
2. Insert the choke sha with the return spring into
the carburetor body.
3. Rotate the choke lever approximately 1/2 turn
counterclockwise. Make sure the choke return
spring hooks on the carburetor body.
4. Position the choke plate as marked during
disassembly. Insert the choke plate into the slot
in the choke sha. Make sure the choke sha is
locked between the tabs on the choke plate.
Figure 5-9. Installing Welch Plugs.
4. Aer the plugs are installed, seal them with
Glyptal™ (or an equivalent sealant). Allow the
sealant to dry.
NOTE: If a commercial sealant is not available,
fingernail polish can be used.
Carburetor Reassembly
1. Install the low idle speed adjusting screw and
spring.
2. If the low idle fuel adjusting needle contains
a limiter, adjust to the midpoint within the
adjustment range.
3. Insert the fuel inlet needle into the float. Align the
needle with the seat and lower the float into the
carburetor body. See Figure 5-10. Install the float
sha.
Tool No. KO1017
Carburetor Body
New Welch Plug
To Next Page
Loading...
