Disassembly Procedure; Float Style Carburetors - Tecumseh ECV100 - 120 Technician's Handbook

DISASSEMBLY PROCEDURE

NOTE: Engines which are identified as compliant with CARB (California Air Resources Board) or EPA (US
Environmental Protection Agency) regulations can NOT be changed from the factory settings unless specifically
authorized.

FLOAT STYLE CARBURETORS

1. Note or mark the high and low mixture adjusting screws
to aid in reassembly (if applicable). Remove the high
speed adjusting screw, bowl nut, and float bowl.
Remove the idle mixture screw assembly.
2. Note the position of the spring clip on the inlet needle
and float, the long end of the clip must face toward the
choke end of the carburetor. Remove the float hinge
pin with a needlenose pliers. Some carburetors use a
float dampening spring to aid the inlet valve in
maintaining a steady position during rough service
applications. Note the position of the hooks before
removing the float hinge pin (diag. 31).
3. Remove the float, clip, and inlet needle.
4. Remove the inlet needle seat using the Tecumseh
carburetor tool #670377 as shown. Push the hook
through the hole in the center of the seat to remove it.
(diag. 32).
5. Note or mark the action of the choke and throttle
shutters, and/or the hook points of the choke or throttle
return spring, or seal retainer springs located on the
top of the choke and/or throttle shaft. Remove the
throttle shutter, throttle shaft, choke shutter, springs
and choke shaft by removing the screw(s) that attach
the throttle or choke shutter to the shaft inside the air
horn.
6. Remove the primer bulb (if equipped) by grasping it
with a pliers and pulling and twisting out of the body.
Remove the retainer by prying and lifting it out with a
screwdriver. Do not re-use the old bulb or retainer (diag.
33).
7. Some Tecumseh float style carburetors have a damper
spring which is installed as shown. (diag. 34)
Use carb. tool
# 670377
31
32
33
34
17