3-7
INSPECTION
After careful disassembly of the carburetor, clean the
carburetor body and float bowl with solvent, or spray
carburetor cleaner. Wearing eye protection, use
compressed air and soft tag wire to clean internal
carburetor passages. (Illust. 3-16) Examine the float for
cracks or leaks. Check the float hinge bearing surfaces
for wear, as well as the tab that contacts the inlet needle.
Examine the throttle, choke shaft, and carburetor body
at the bearing points and holes into which the linkage is
fastened. If dust seals are present, check the seal
condition and for correct placement next to the carburetor
body. If the condition of any of these parts is worn or
questionable replace them. The float can be checked
for leakage by submersion in a clear jar filled with hot
water. If any air bubbles are noted the float must be
replaced.
NOTE: DO NOT INTERCHANGE MAIN NOZZLES OR
METERING JETS FROM OTHER CARBURETORS.
3-16
CARBURETOR RE-ASSEMBLY
WELCH PLUGS
To install a new welch plug, secure the carburetor in a
vise equipped with protective jaws. Place the welch plug
into the mixing well pocket with the raised portion up.
With a punch equal to the size of the plug-hole, flatten
the plug. Do not dent or drive the center of the plug below
the top surface of the carburetor. After installation of the
welch plug, seal the outer diameter with fingernail polish.
(Illust. 3-17)
3-17
THROTTLE SHAFT AND PLATE
When reassembling the throttle plate on a series 7
carburetor, it is important that the marking on the plate
be in the 3 o’clock position facing out with the throttle
plate closed. (Illust. 3-18)
3-18
3 O’CLOCK
POSITION
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