Tecumseh ECV100 - 120 Technician's Handbook page 22

8. Remove all welch plugs if cleaning the carburetor.
Secure the carburetor in a vise equipped with protective
jaws. Use a small chisel sharpened to a 1/8"
(3.175 mm) wide wedge point. Drive the chisel into the
plug to pierce the metal, then push down on the chisel
to pry the plug out of the hole (diag. 35).
NOTE: DO NOT REMOVE ANY BALL OR CUP PLUGS
(diag. 37).
9. Note the direction of the inlet fitting. If necessary the
inlet fitting can be removed. (See page 24).
10. The main nozzle on Series 8 and Series 9 carburetors
can be removed by pressing the tube outward from the
venturi thru the center leg. This nozzle is non-metallic
and has an "O" ring seal on the top and bottom end of
the tube. Do not remove a main nozzle that is made of
brass from any Tecumseh carburetor. These are
pressed in at the factory to a specific depth. When
removing the nozzle, the top "O" ring may not come
out with the tube. The "O" ring must be removed and
placed on the nozzle before it is placed back into the
center leg or it will not seal properly. (diag. 38)
11. Servicing the standard series eleven and bridged
model.
When servicing the series eleven DO NOT soak it in
dipping type carburetor cleaners, use only spray
cleaner or standard solvent tank cleaners. Proper
cleaning requires removal of both welch plugs and
cleaning of the restictor(s) as equipped.
The standard series eleven has one restictor in the
extended prime well as shown (diag. 36). The Bridged
series eleven has an additional restrictor on the idle
leg of the carburetor as shown (diag. 37). Both are
cleaned using spray carburetor cleaner, compressed
air and soft tag wire no larger than .012 inch (.3mm) or
damage will occur.
The main nozzle on some Walbro carburetors are
removable for service. If you remove it, a service nozzle
with the under cut fuel passage must be installed or
problems will occur (diag. 39).
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35
36
37
38
39