CS-350WES
32
FUEL SYSTEM
2K005A
(A)
(A)
(C)
(B)
4-12 Replacing Welch plug
If engine do not run smoothly even after readjusting
carburetor and checking carburetor parts, check the
low speed ports as follows:
1. Remove metering lever and relative parts to
prevent them from damage.
2. To remove Welch plug (A), punch the remover
through the Welch plug at a low angle and pry it
out.
3. Clean low speed ports with compressed air.
4. Place a new Welch plug over the opening and
gently tap it until flush.
5. Install all removed parts to carburetor body.
4-11 Checking inlet needle valve
1. Remove metering lever pin with the lever (A),
spring (C), and inlet needle valve (B).
2. Inspect inlet needle valve. If worn or sticky, clean
or replace as required.
NOTE: Causes of fuel flooding from carburetor to
cylinder are as follows:
- Improper assembling of metering lever and
spring.
- Dirt between inlet needle valve and the seat.
- Worn inlet needle valve tip.
3. Clean the valve seat using thin wooden stick and
suitable clean solvent. (Do not use metal tools.)
4. Assemble inlet needle valve, pin with metering
lever and spring.
NOTE: Make sure of metering lever installation as
follows:
(1) The spring is seated in its hole at chamber floor.
(2) The spring is under dimple of metering lever.
(3) The metering lever fork is holding inlet needle
valve.
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