
SERVICE INFORMATION
CS-310ES
3
1-2 Technical data
Engine
Idling speed
r/min
3,200 +/- 400
Wide open throttle speed*
r/min
12,000 - 13,000
Clutch engagement speed
r/min
4,000 - 4,500
Compression pressure
MPa (kgf/cm
2
) (psi)
0.88 (9.0) (128)
Ignition system
Spark plug gap
mm(in)
0.6 - 0.7 (0.024 - 0.028)
Minimum secondary voltage at 1500 r/min
kV
15.0
Primary coil resistance
Ω
140 - 180
Secondary coil resistance
k
Ω
1.9 - 2.3
Pole shoe air gaps
mm (in)
0.3 - 0.4 (0.012 - 0.016)
Ignition timing
at 1,000 r/min
°BTDC
14
at 3,000 r/min
°BTDC
12
at 8,000 r/min
°BTDC
33
at 10,000 r/min
°BTDC
35
at 12,000 r/min
°BTDC
33
Carburettor
Idle adjust screw initial setting
turns in**
7/8
L mixture needle initial setting
turns back
2 1/2
H mixture needle initial setting
turns back
2 1/4
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 7000 r/min
Fixed 7 mL/min
mL/min(U.S.
fl
.oz./min)
BTDC: Before top dead centre.
* With 30/35 cm guide bar and properly adjusted saw chain.
**Set idle adjust screw to the point that its tip contacts throttle plate before initial setting.