Inspecting Metering Lever Height; Inspecting Inlet Needle Valve - Echo CS-370ES Service Manual

32

4-11 Inspecting metering lever height

4-12 Inspecting inlet needle valve

B
C
2K005A
FUEL SYSTEM
A
B
A
1. Remove carburetor.
2. Remove metering diaphragm cover, metering
diaphragm and gasket.
3. Inspect metering lever height by Metering lever
gauge 897563-19830 (A).
Metering lever height: 1.65 mm (0.068 in) lower than
diaphragm seat (B)
4. If necessary, gently bend metering lever up or
down to set metering lever to proper position.
NOTE: When metering lever is:
Too high Fuel flooding occurs
Too low Fuel starvation / overheating occurs
1. Remove metering lever (A) and pivot pin. Remove
spring (B) and inlet needle valve (C).
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 valve seat.
- Worn inlet needle valve tip.
3. Clean inlet needle valve seat using suitable clean
solvent. (Do not use metal tools.)
4. Reassemble inlet needle valve, spring, metering
lever and pivot pin.
NOTE: Make sure of metering lever installation as
follows:
(1) Spring is seated in its hole at chamber floor.
(2) Spring is under dimple of metering lever.
(3) Metering lever fork is holding inlet needle valve.
CS-370ES
CS-420ES