Clean Carburetor; Inspect Carburetor; Check Throttle, Choke Shaft, And Body - Briggs & Stratton Vanguard 430000 User Manual

10
Figure 10
9. Remove screw and choke plate
(A, Figure 11).
10. Remove choke shaft (B) and spring (C).
Figure 11
NOTE: If engine is equipped with an electronic
governor system, DO NOT remove throttle plate or
throttle shaft. This is a precision assembly and
should not be disassembled.
11. If engine is not equipped with an electronic
governor, proceed to step 12.
12. Mark throttle plate (A, Figure 12) before
removing so that it may be reinstalled in the
same position. Sides of throttle plate are
beveled.
13. Remove two screws, throttle plate, throttle
shaft (B) with collar (C) and seal (D). Discard
seal.
68
Figure 12

Clean Carburetor

Remove gasket material from mounting surfaces.
Gummy or dirty carburetors should be cleaned in a
carburetor cleaner. DO NOT soak rubber,
neoprene, or plastic parts in cleaner.
NOTICE: If engine is equipped with an electronic
governor system, DO NOT clean carburetor in
carburetor cleaner. The carburetor is equipped with
sealed ball bearings for the throttle shaft, which will
be damaged if the carburetor is immersed in
carburetor cleaner. Ball bearings are not
replaceable.

Inspect Carburetor

Inspect all parts for wear, cracks, nicks, and burrs.
Inspect float for leaks. Replace all damaged parts.
Inspect Throttle, Choke Shaft, and Body for
Wear
1. Lay carburetor on flat surface and check
throttle and choke shaft clearance
(Figure 13).
NOTE: Throttle shaft and choke shaft clearance
must not exceed 0.010 in. (.25 mm).