Echo CS-310 Service Manual

MAINTENANCE GUIDE
CS-310
69
11-1 Troubleshooting guide (continued)
Fuel system / Carburetor
Air filter
Fuel cap / strainer
Carburetor adjustment
Carburetor leakage
Carburetor metering lever height
Carburetor inlet needle valve
Welch plug
4-1
Inspecting first.
2-stroke oil (grade / mix ratio)
Engine
Cooling air passage
Muffler / Exhaust port
Cylinder compression
Crankcase / cylinder seal
Crankcase / Cylinder
Piston / Piston ring
4-2
4-7
4-9
4-11
4-12
4-14
4-7-1
8-2
8-3
1-2, 8-1
8-4
8-4, 8-6
8-7
Fuel tank/line/vent, Purge bulb 4-3 to 4-6
INSPECTING
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01
REFERENCES
Carburetor diaphragms 4-13
Crankcase pulse passage 4-10
Throttle trigger 9-1
Fuel (octane / freshness / purity) 4-7-1
Others
Chain brake
Cushions
Saw chain
6-1, 6-2
9-2
Replace / Sharpen
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01
Oil seal / Ball bearings 8-9
Guide bar / Oil holes Clean
Saw chain lubrication system
Oil cap
Auto-oiler
7-1
7-5
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01
Chain tensioner 10-1
Oil tank / line / strainer 7-1, 7-3, 7-4
Oil tank vent 7-2

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