Technical Data; Carburetor Data - Echo CS-3000 Service Data

CS-3000 CS-3050
CS-3400 CS-3450

1-2 Technical data

Model
Engine
Idling speed
Operating speed
High speed (No load full throttle)*
Clutch-in speed
Compression pressure, standard kgf/cm
Ignition system
Spark plug gap
Minimum secondary voltage
Secondary coil resistance
Pole shoe air gaps
Ignition timing at 1500 rpm
Ignition timing at 3000 rpm
Ignition timing at 7500 rpm
Chain oil discharge volume at 7000 rpm
cm
BTDC: Before top dead center.
*With guide bar and saw chain.

1-3 Carburetor data

Carburetor Model
Supplier & Type
Venturi Size
Throttle Bore
Idle speed screw initial setting turn in
H needle initial setting turn back
L needle initial setting turn back
Test Pressure, minimum
Metering lever height
Applicable model
H needle: High speed needle.
L needle: Idle needle.
SERVICE INFORMATION
rpm
rpm
rpm
rpm
(psi)
2
mm(in)
kV
kΩ
mm(in)
°BTDC
°BTDC
°BTDC
/min(U.S.fl.oz./min)
3
WT-248 WT-254 WT-261 WT-271 WT-381 WT-385
mm(in) 9.53 (3/8)
mm(in) 15.85 (5/8)
2
1 1/4
1 1/4
kgf/cm (psi)
2
mm(in)
CS-3000 CS-3050 CS-3450 CS-3400 CS-3050 CS-3000
CS-3000 CS-3050
2700 - 3300
6500 - 9000
11000 - 12000
4100 - 4300
8 (115)
0.6 - 0.7 (0.024 - 0.028)
( 1.0 - 1.5 ) 1.2 - 1.8
0.3 - 0.4 (0.012 - 0.016)
( 27 ) 29
( 27 ) 29
( 27 ) 29
1.5 - 13 (0.05 - 0.45) adjustable
Walbro Diaphragm horizontal-draught
11.11 (3/8)
15.85 (5/8)
2
1 1/8
1 1/8
0.5 (7.0)
1.65 ((0.65) lower than diaphragm seat
CS-3400 CS-3450
15
( 1.0 - 1.5 ) 1.2 - 1.8
0.3 - 0.4 (0.012 - 0.016)
( 27 ) 11
( 27 ) 12.5
( 27 ) 26
WT-385A
9.53 (3/8)
14.3 (9/16)
2
1 1/4
1
CS-3000
CS-3450 CS-3400 CS-3050
CS-3400
CS-3450
3
15
16.5
30