Echo HCA-2500 - Manual (Page 3)

SERVICE INFORMATION HCA-2500
3
1-2 Technical data
Engine
Idling speed r/min 2400 - 3200
Operating speed r/min 7000 - 8000
Wide open throttle speed r/min 9000 - 10500
Clutch engagement speed r/min 3700 - 4300
Compression pressure MPa (kgf/cm 2 ) (psi) 0.94 (9.6) (136)
Ignition system
Spark plug gap mm (in) 0.6 - 0.7 (0.024 - 0.028)
Minimum secondary voltage at 1500 r/min kV 15
Primay coil resistance
Ω
200 - 400
Secondary coil resistance k
Ω
1.3 - 1.8
Pole shoe air gaps mm(in) 0.30 - 0.40 (0.012 - 0.016)
Ignition timing at 3000 r/min
°
BTDC 29
at 8000 r/min
°
BTDC 28
at 9000 r/min
°
BTDC 12
Carburettor
Idle adjust screw initial setting turn in* 1 1/2
L mixture needle initial setting turn back 2 1/4
H mixture needle initial setting turn back 3 1/4
Test Pressure, minimum MPa (kgf/cm 2 ) (psi) 0.05 (0.5) (7.0)
Metering lever height mm (in) 1.65 (0.065) lower than diaphragm seat
BTDC: Before top dead centre.
* Set idle speed screw to contact throttle plate before initial setting.