Disassembly of Carburetor - Up Draft
1.
After removing carburetor from engine,
remove 4 capscrews and separate throttle body (includes
float) from lower carburetor body. .
2.
Remove float pin,
float and body gasket.
Remove fuel inlet needle. Check needle for damage and
float ior dents, leakage or excessive wear on lever or in hinged area.
3. Remove throttle plate retaining screw (and lock washer) then slip plate out of slot in shaft. Slide
throttle shaft out of body.
Inspect bushing and shaft -- unfiltered air could enter in this area if
worn.
4.
Remove main fuel needle -
inspect for wear or damage.
clean venturi and fuel bowl areas.
Blow out main fuel nozzle, thoroughly
.
5.
Do not remove choke plate or choke shaft uhless loose or damaged. Further disassembly of lower
body is not normally necessary.
.
.
Reassembly of Carburetor - Up Draft
Reassembly is essentially the reverse of the disassembly procedure. Special instructions are
needed, however, to properly set the level of float before throttle body is reinstalled to carburetor body.
Float: Level; Turn throttle body upside down,
install new gasket and fuel inlet needle then position float
and insert float pin.
With float lever resting on inlet needle, measure distance between gasket and
bottom of float at free end.
The distance should .be S/16*’ - if adjustment is needed, carefully bend
float lever to attain proper level.
After carburetor is reinstalled on engine, recheck for proper level
by removing fuel level plug -
if properly s&t, fuel level should be just below this hole.
THROTfLE PLATE
0
THROTTLE
-
SHAFT
.
.
GASKET, UPQER BODY
CARBURETOR,
UPPER BODY
.
VENTURI
GASKET s
FLOAT (GASOLINE)
ILE & SEAT
SHUTTER (PLATE)
.
CHOKE SHAFT
CARBURETOR,
LOWER BODY
1.
MAIN FUEL ADJUSTING NEEDLE
FIGURE 4-3 --
_
EXPLODED VIEM - TYPICAL UPDRAFT CARBURETOR
.
42
l
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