Service Manual

Primer Start Carburetor Dissassembly
1. At the throat of the carburetor, using a needle
nose pliers, gently pull the throttle plate out of
the air vane assembly shaft
(Figure 35). Notice
the orientation of the small protrusions on the
throttle plate as you pull it out. The single
protrusion should be on your left; next to the hole
at the
9 o’clock position).
Figure 35
3. Hold the governor collar on the carburetor and
lift the air vane/throttle shaft out of the
carburetor. Lift the collar and spring up,
detaching the spring from the speed control
lever.
4. Turn the carburetor over and remove
the four bowl retaining screws, the
bowl gasket and the bowl
(Figure 36).
Discard the bowl gasket.
Gasket
fuel
Fuel
(main jet)
5. Remove the fuel filter from the fuel nozzle.
6. Remove the float hinge pin, the inlet valve
needle assembly (with its clip) and the float
(Figure 36). Discard the needle and clip.
7. Inspect the float for cracks or deterioration of the
cork.
8. Remove the brass inlet fuel valve seat and
discard it
(Figure 36).
9. Remove the nozzle and the high speed jet from
the nozzle.
Primer Start Carburetor Cleaning and
1. With the carburetor completely disassembled,
thoroughly clean all parts in a parts cleaning
solution and inspect for wear or deterioration.
Blow dry all carburetor passages with
compressed air. Use a spray cleaner only to
clean external surfaces.
CAUTION: If tag wire is used, never enlarge or
restrict any passageway in the carburetor.
2. Always check the carburetor mounting flange
and the fuel bowl mounting flange to be sure
they are flush.
Primer Start Carburetor Assembly
1.
2.
3.
4.
5.
6.
7.
Install the high speed jet into the fuel nozzle
(Figure 36).
Turn the carburetor over and install the nozzle
assembly into the carburetor body.
Install a new brass inlet fuel valve seat.
Install a new inlet valve needle and clip on the
float.
Install the float assembly with a new float hinge
pin in the bottom of the carburetor. Ensure that
the hinge pin is positioned properly to keep the
float level. The float should be free to move up
and down easily in the carburetor body.
Adjust float
so height is 7/16 to 15/32 from bowl
flange (gasket not in place) to top of float.
Install the fuel filter over the fuel nozzle.
Figure 36
Carburetor 34 Service Section