32 BRIGGSandSTRATTON.COM
Figure 30
- OR -
If carburetor is equipped with a metal choke shaft, rotate
choke shaft to closed position. Remove two choke valve
screws and choke valve. Remove choke shaft, return spring
and foam seal. Discard seal.
11. With a modified pin punch (A, Figure 30) remove welch
plug (B) from carburetor body.
NOTE: Do not attempt to remove the pilot jets, which are
pressed in and not serviceable.
Inspect and Clean Carburetor
1. Inspect openings in the carburetor body for evidence of
wear or damage. If found, replace the entire carburetor
assembly.
2. Inspect the choke shaft, choke valve, throttle shaft, and
throttle valve for evidence of wear or damage. Replace
parts as necessary.
3. Using Carb/Choke Cleaner #100041 or #100042,
thoroughly clean the following components, then follow
with compressed air to dry:
• Passages in the fixed main jet (bowl nut) or emulsion
tube
• Inside and outside of the fuel bowl
• Float
• Choke shaft and choke valve
• Throttle shaft and throttle valve
• All passages, openings, and the inside and outside of
the carburetor body
NOTE: Do not soak non-metallic components, such as fl oats,
o-rings, seals, or diaphragms, in carb/choke cleaner or they
will be damaged.
4. If any passages remain plugged after cleaning, replace
the component or the entire carburetor assembly.
Assemble Carburetor
Consult the Illustrated Parts List to obtain the appropriate
carburetor overhaul kit before reassembling the carburetor.
1. Install new welch plug (A, Figure 31) with pin punch
(B) of slightly smaller diameter than the plug. Press
against the plug until it is flat in the carburetor opening.
Do not cave in plug. Seal the edge of the plug with non-
hardening sealant.
2. If carburetor is equipped with a metal choke shaft,
• Install new foam seal and return spring (C, Figure 32)
on choke shaft, hooking small hook (A) in notch on
choke lever (D).
• Insert choke shaft assembly into carburetor body
and engage large end of return spring (E) on boss. If
carburetor has detent spring, guide spring into slot in
choke shaft lever (B).
• Place choke valve (F) on shaft and install screws, then
actuate the choke shaft to check for proper movement.
Figure 31
Figure 32
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