Echo CS-310 Service Manual

FUEL SYSTEM
CS-310
35
4-12 Inspecting inlet needle valve
1. Remove metering lever (A) and pivot pin. Re-
move 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 fl ooding 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:
Insure proper metering lever installation as
follows.
(1) Spring is seated in its hole at chamber fl oor.
(2) Spring is under dimple of metering lever.
(3) metering lever fork is holding inlet needle valve.
A
B
C

Echo CS-310 Specifications

General

Engine Displacement	30.5 cc
Bar Length	14 inches
Weight	8.8 lbs
Chain Pitch	3/8 inch
Chain Gauge	0.050 inch