Echo CS-2511TES - Service Information; 1-1 Specifications

SERVICE INFORMATION
CS-2511TES
251Ts, 251TCs
2
1 SERVICE INFORMATION
1-1 Specications
Dimensions Length* mm(in) 243 (9.57)
Width mm(in) 205 (8.07)
Height mm(in) 196 (7.72)
Dry weight* kg(lb) 2.3 (5.1)
Engine Type YAMABIKO, air-cooled, two-stroke, single cylinder
Rotation Clockwise as viewed from the output end
Displacement cm
3
(in
3
) 25.0 (1.525)
Bore mm(in) 35.0 (1.378)
Stroke mm(in) 26.0 (1.024)
Compression ratio 7.9
Carburetor Type Diaphragm horizontal-draught with separated primer
Model
Walbro WT-1153 (CS-2511TES)
WT-1155 (251Ts, 251TCs)
with Large D-shaped mixture needles
Venturi size-Throttle bore mm(in) 11.11-14.3 (0.437-0.563)
Ignition Type
CDI (Capacitor discharge ignition) system
Digital magneto
Spark plug CMR7H
Starter Type ES (effortless)-start / S(Soft)-start
Rope diameter x length mm(in) 3.0 x 720 (0.12 x 28.3)
Fuel Type Premixed two-stroke fuel
Mixture ratio 50 : 1 (2 %)
Petrol Minimum 89 octane petrol
Two-stroke air cooled engine oi
l
ISO-L-EGD (ISO/CD13738), JASO FC/FD
Tank capacity L (UK..oz.) 0.19 (6.7)
Exhaust Mufer type
Spark arrester mufer with catalyst
Clutch Type Centrifugal type, 3-shoe slide with 3-tension spring
Guide bar / Saw chain lubrication type Adjustable automatic oil pump
Oil Tank capacity L (UK..oz.) 0.14 (4.9)
Auto oiler Type Clutch related type
Sprocket Type Spur
Number of teeth 6 (Sprocket nose bar), 8 (Carving bar)
Pitch in 3/8 (Sprocket nose bar), 1/4 (Carving bar)
Spike Option (Parts number: P200-000150)
* Without guide bar and saw chain.
Cutting devices
Sprocketnosebar Carvingbar
Guide bar
Type
C20S91-35SA C25S91-40SL C30S91-47ML C20H25-52CL
C25H25-60CL
:CS-2511TES only
C25H25-60CLD
Called length cm 20 25 30 20 25
Gauge in 0.050
Saw chain
Type
Carlton N1C-BL
OREGON 91PX
OREGON 25AP
Number of drive links 35 40 47 52 60
Pitch in 3/8 1/4
Gauge in 0.050