Echo CS-400 Service Manual

3
CS-400
SERVICE INFORMA TION
1-2 Technical
data
Engine
Idling speed RPM 2,650 +/- 250
Wide open throttle speed* RPM 12,000 - 12,600
Clutch engagement speed RPM 4,100
Service limit speed
†
RPM 3,200
Compression pressure MPa (kgf/cm
2
) (psi) 0.88 (8.9) (127)
Ignition system
Spark plug gap mm(in) 0.6 - 0.7 (0.024 - 0.028)
Minimum secondary voltage at 1,000 RPM
kV
15
Primary coil resistance
Ω
200 - 400
Secondary coil resistance
kΩ
1.5 - 2.2
Pole shoe air gaps
mm (in)
0.3 - 0.4 (0.012 - 0.016)
Ignition timing
at 3,000 RPM
°BTDC
10
at 8,000 RPM
°BTDC
32
at 10,000 RPM
°BTDC
34
PET-9000 Parameter
#1
317
#2
04
Carburetor
Idle adjust screw initial setting turns in** 1 3/8
Test Pressure, minimum MPa (kgf/cm
2
) (psi) 0.05 (0.5) (7.0)
Metering lever height mm(in) 1.65 (0.06) lower than diaphragm seat
Chain oil discharge volume at 7,000 RPM Adjustable : 1.5 - 13 (0.05 - 0.40)
mL/min(U.S.fl.oz./min) (Factory set 7 mL/min)
BTDC: Before top dead center.
* With 16 in. guide bar and saw chain.
**Set idle adjust screw to contact throttle plate before initial setting.
†
If clutch engagement speed is lower than service limit speed, replace clutch assembly with new one.

Echo CS-400 Specifications

General

Engine Displacement	40.2 cc
Weight (without bar and chain)	10.1 lbs
Oil Capacity	8.5 oz
Chain Pitch	3/8 inch
Chain Gauge	.050 in.
Vibration Level (Front/Rear Handle)	6.0 / 6.5 m/s²