Inspecting Pump Diaphragm And Inlet Screen; Replacing Welch Plug - Echo shindaiwa CSG-7410ES Service Manual

CSG-7410ES
EC741S
4-11 Inspecting pump diaphragm and inlet screen
F

4-12 Replacing welch plug

B
D
FUEL SYSTEM
A
B
C
D
E
A
1. Remove screw (A), pump cover (B), pump gas-
ket (C), pump diaphragm (D) and (E).
2. Inspect pump diaphragm (D) and (E). Replace if
hardened or curled at valve tabs.
3. Inspect pump gasket (C). Replace if defective.
4. Inspect inlet screen (F). If blocked, remove and
clean it, or replace.
NOTE: When cleaning pump side with compressed
air, take care not to blow inlet screen (F) away.
If engine does not run smoothly even after read-
justing carburetor and inspecting carburetor parts,
inspect low speed ports on carburetor as follows:
1. Remove metering lever and related parts to pro-
tect them from damage (Refer to "4-9 Inspecting
metering chamber and inlet needle valve").
2. To remove welch plug (B), punch the remover
tool (A) through welch plug at low angle and pry it
C
out.
NOTE: Remover tool (A) and welch plug installer
(C) are included in Welch plug tool kit (Part num-
ber: 500-500).
3. Clean low speed ports with compressed air.
4. Place a new welch plug (B) over the opening
and gently tap it until flush using welch plug install-
er (C).
5. Install all removed parts to carburetor body.
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