Echo CS-420ES Service Manual

CS-370ES
CS-420ES
64
MAINTENANCE GUIDE
11-2 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.
Sprocket
Compression / Exhaust system
Cooling air passage
Muffler / Exhaust port
Cylinder compression
Crankcase/cylinder seal
Crankcase / Cylinder
Piston / Piston ring
4-2
4-7
4-5
4-8
4-11
4-12
1-5, 5-1
7-2
7-3
1-2, 7-1
7-4
7-4, 7-8
7-7
Fuel tank/line/vent 4-4 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 4-9
Throttle trigger 9-3
Clutch system
Clutch shoes/spring/bearing
Clutch drum
5-1 to 5-3
5-1, 5-3
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01
Others
Chain brake
Cushions
Saw chain
8-1, 8-2
9-2
Replace / Sharpen
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01
Crankshaft / Ball bearings 7-8, 7-9
Guide bar / Oil holes Clean
Saw chain lubrication system
Oil cap
Auto-oiler
6-1
6-5 to 6-7
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01
Chain tensioner 10-1
Oil tank/line/strainer 6-1, 6-2, 6-4
Oil tank vent 6-3

Echo CS-420ES Specifications

General

Saw Chain Gauge	0.050 inches
Fuel Capacity	0.41 liters
Weight	4.6 kg
Saw Chain Pitch	3/8 inches
Bar Length	16 inches