Echo CS-420ES - Manual (Page 2)

SERVICE INFORMATION CS-420ES
2
1 SERVICE INFORMATION
1-1 Specifi cations
Model CS-420ES
Dimensions Length* mm(in) 393 (15.47)
Width mm(in) 245 (9.65)
Height mm(in) 277 (10.91)
Dry weight* kg(lb) 4.6 (10.1)
Engine Type KIORITZ, air-cooled, two-stroke, single cylinder
Rotation Clockwise as viewed from the output end
Displacement cm 3 (in 3 ) 40.2 (2.453)
Bore mm(in) 40.0 (1.575)
Stroke mm(in) 32.0 (1.260)
Compression ratio 6.5
Carburettor Type Diaphragm horizontal-draught with auto-return choke
Model Walbro WT-820A
Venturi size-Throttle bore mm(in) 13.50 - 15.85 (0.532 - 0.624)
Ignition Type CDI (Capacitor discharge ignition) system
Digital magneto
Spark plug BPMR8Y
Exhaust Muffl er type Spark arrestor muffl er with catalyst
Starter Type ES (effortless-start)
Rope diameter x length mm(in) 3.0 x 950 (0.12 x 37.4)
Fuel Type Premixed two-stroke fuel
Mixture ratio 50 : 1 (2 %)
Gasoline Minimum 89 octane gasoline
Two-stroke air cooled engine oi l ISO-L-EGD (ISO/CD13738), JASO FC/FD
Tank capacity L (U.S.fl .oz.) 0.41 (13.9)
Clutch Type Centrifugal, 3-shoe slide with 3-tension spring
Guide bar / Saw chain lubrication type Automatic with volume adjuster
Oil Tank capacity L (U.S.fl .oz.) 0.28 (9.5)
Auto oiler Type clutch driven type
Sprocket Type Spur
Number of teeth 7
Pitch in 0.325
Chain tensioner type Side Access
Cutting devices
Guide bar Type 38RD58-325 43RD58-325
Called length cm 38 45
Gauge in 0.058
Saw chain Type CARLTON K2L OREGON 21BP
Number of drive links 64 72
Pitch in 0.325
Gauge in 0.058
* Without guide bar and saw chain.