Briggs & Stratton 276535, 271172 Inspect and Clean Carburetor Components, Assemble Carburetor

Inspect and Clean Carburetor Components

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)

•Inside and outside of the fuel bowl

•Float

•Choke shaft and choke valve

•Throttle shaft and throttle valve

4• All passages, openings, and the inside and outside of the carburetor body

NOTE: Do not soak non-metallic components, such as floats, 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 17) with a 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 the plug. Seal the edge of the plug with a non-hardening sealant.

Figure 17

2.Install new foam seal (B, Figure 18) on choke shaft (E), then slide shaft into carburetor body (C). Rotate shaft clockwise (A), and insert choke valve into slot until centered, with dimples (D) positioned as shown. Actuate the choke shaft to check for proper movement.

Figure 18

3.Install new foam seal (C, Figure 19) on throttle shaft (B), then slide shaft into carburetor body. Rotate shaft until flat is facing out. Position throttle valve on flat with numbers facing out (A), then install screws (D). Actuate the throttle shaft to check for proper movement.

Figure 19

4.Install idle speed screw and spring. Install idle mixture screw and spring with a new limiter cap, if equipped.

5.Using Bushing Driver #19057

(A, Figure 20), install new needle seat with grooved edge down (B) until firmly seated.

70