Echo PB-651T/H, Service Manual

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PB-651T/H
PB-751T/H
PB-755T/H
3
SERVICE INFORMATION
1-2 Technical data
Model PB-651T/H PB-751T/H PB-755T/H
Engine
Idling speed r/min 2400 - 2800
Wide open throttle speed r/min 6800 - 7300
Compression pressure MPa (kgf/cm
2
) (psi) 1.0 (10.2) (145)
Ignition system
Spark plug gap mm(in) 0.6 - 0.7 (0.024 - 0.028)
Minimum secondary voltage at 1000 r/ min kV 12
Secondary coil resistance k
Ω
1.2 - 1.8
Pole shoe air gaps mm(in) 0.3 - 0.4 (0.012 - 0.016)
Ignition timing
°
BTDC 30
Carburetor
Venturi size mm(in) 15.0 (0.591)
Throttle bore mm(in) 15.0 (0.591)
Idle adjust screw initial setting turn in* 1 1/2
Test Pressure, minimum MPa (kgf/cm
2
) (psi) 0.05 (0.5) (7.0)
Metering lever height mm (in) 1.5 (0.06) lower than diaphragm seat
BTDC: Before top dead center.
* Set idle speed screw to the point that its tip just contacts throttle plate before initial setting.