SERVICE INFORMATION
CS-370ES
3
1-2 Technical data
Engine
Idling speed r/min 2400 - 2900
Wide open throttle speed* r/min 11500 - 12500
Clutch engagement speed r/min 3800 - 4300
Compression pressure MPa (kgf/cm
2
) (psi) 1.02 (10.4) (148)
Ignition system
Spark plug gap mm(in) 0.6 - 0.7 (0.024 - 0.028)
Minimum secondary voltage at 1000 r/min kV 15
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 3000 r/min °BTDC 10
at 8000 r/min °BTDC 32
at 10,000 r/min °BTDC 34
at 12,500 r/min °BTDC 32
Carburetor
Idle adjust screw initial setting turns in** 1 5/8
L mixture needle initial setting turns back 1 1/4
H mixture needle initial setting turns back 2 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 7000 r/ min 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 35 cm guide bar and saw chain.
** Set idle speed screw to the point that its tip just contacts throttle plate before initial setting.
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