SERVICE INFORMATION
CS-310
3
1-2 Technical data
Engine
Idling speed rpm 3,200 +/- 400
Wide open throttle speed* rpm 12,000 - 13,000
Clutch engagement speed rpm 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 rpm kV 15.0
Primary coil resistance Ω 140 - 180
Secondary coil resistance kΩ 1.9 - 2.3
Pole shoe air gaps mm(in) 0.3 - 0.4 (0.012 - 0.016)
Ignition timing at 1,000 rpm °BTDC 14
at 3,000 rpm °BTDC 12
at 8,000 rpm °BTDC 33
at 10,000 rpm °BTDC 35
at 12,000 rpm °BTDC 33
PET-9000 Parameter #1 321
#2 06
Carburetor
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 rpm
Fixed 7 mL/min
mL/min(U.S.fl .oz./min)
BTDC: Before top dead center.
* With 14 in. guide bar and properly adjusted saw chain.
**Set idle adjust screw to the point that its tip contacts throttle plate before initial setting.
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