Technical Data - Bosch PB-650 Service Manual

PB-650
PB-750

1-2 Technical data

Model
Engine
Idling speed
Wide open throttle speed
Compression pressure
Ignition system
Spark plug gap
Minimum secondary voltage at 1000 r/ min
Secondary coil resistance
Pole shoe air gaps
Ignition timing
Carburetor
Venturi size
Throttle bore
Main jet
Idle adjust screw initial setting
Test Pressure, minimum
Metering lever height
BTDC: Before top dead center.s
* Set idle speed screw to contact throttle plate before initial setting.
** Screw in idle mixture needle from initial thread engagement (at the point that the clicking sound is heard).
SERVICE INFORMATION
r/min
r/min
MPa (kgf/cm ) (psi)
2
mm(in)
kV
kΩ
mm(in)
°BTDC
mm(in)
mm(in)
trun in*
MPa (kgf/cm ) (psi)
2
mm (in)
PB-650
2200 - 2800
7000
0.8 (8.0) (115)
0.6 - 0.7 (0.024 - 0.028)
12
1.2 - 1.8
0.3 - 0.4 (0.012 - 0.016)
30
15.0 (0.591)
15.0 (0.591)
#58.5
1 1/2
0.05 (0.5) (7.0)
1.5 (0.06) lower than diaphragm seat
3
PB-750
#50