SERVICE INFORMATION
CS-260TES
CS-270WES
3
1-2 Technical data
Model CS-260TES CS-270WES
Engine
Idling speed r/min
2800 - 3600
Operating speed r/min
8500 - 9000
High speed (No load full throttle)* r/min
11000 - 12500
Clutch engagement speed r/min
4450 - 4750
Compression pressure MPa (kgf/cm
2
) (psi) 0.85 (8.7) (124)
Ignition system
Spark plug gap mm(in) 0.6 - 0.7 (0.024 - 0.028)
Minimum secondary voltage at 1500 r/min kV 15
Secondary coil resistance kΩ 1.2 - 1.8
Pole shoe air gaps mm(in) 0.30 - 0.40 (0.012 - 0.016)
Ignition timing at 1500 r/min °BTDC 25
at 3000 r/min °BTDC 20
at 8000 r/min °BTDC 36
at 12000 r/min °BTDC 25
Carburettor
Idle adjust screw initial setting turns in** 2 1/8
L mixture needle initial setting turns back 1 5/8
H mixture needle initial setting turns back 1 7/8
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 centre.
*With 25cm 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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