3
Repair Manual PS-6400/PS-7300/PS-7900
TECHNICAL DATA
Stroke volume
cm
3
64,2
72.6
78.5
Bore
mm
47
50
52
Stroke
mm
37
37
37
Max. power at speed
3)
kW / 1/min
3.5 / 9,000
4.2 / 9,500
4.6 / 9,500
Max. torque at speed
3)
Nm / 1/min
4.2 / 6,500
4.8 / 7,000
5.2 / 7,000
Idling speed / max. engine speed with bar and chain
1/min
2,500 / 13,500
2,500 / 13,500
2,500 / 13,500
Clutch engagement speed
1/min
3,200
3,200
3,200
Sound pressure level at the workplace L
pA av
per ISO/CD 22868
1)
dB (A)
104.3
104.3
104.3
Sound power level L
WA av
per ISO/CD 22868
1)
dB (A)
113.3
113.3
113.3
Vibration acceleration a
h,w av
per ISO 7505
1)
- Tubular handle
m/s
2
6.9
6.9
6.9
- Rear handle
m/s
2
7.7
7.7
7.7
Carburetor (diaphragm carburetor)
Type
ZAMA
Ignition system
Type
electronic
Spark plug
Type
NGK BPMR 7A
Electrode gap
mm
0.5
or spark plug
Type
BOSCH WSR 6F
Fuel consumption at max. load per ISO 7293
3)
kg/h
1.72
2.33
2.3
Specific consumption at max. load per ISO 7293
3)
g/kWh
500
510
505
Fuel tank capacity
l
0.75
Chain oil tank capacity
I
0.42
Mixture ratio (fuel/two-stroke oil)
- when using DOLMAR oil
50 : 1
- when using other oils
40 : 1
Chain brake
engages manually or in case of kickback
Chain speed
2)
m/s
19.74
20.83
20.83
Sprocket pitch
inch
3/8
Number of teeth
Z
7
Chain type see the Extract from the spare-parts list
099
Pitch / gauge
inch
3/8 / .058
Guide bar, length of a cut
cm
38 / 45 / 50 / 60 / 70
Guide-bar type see the Extract from the spare-parts list
Weight (fuel tank empty, without chain and guide bar)
kg
6.3
6.3
6.3
1)
Figures derived in equal part from idling, full-load and racing speed.
2)
At max. power
3)
For models without starting valve
Technical data
PS-6400
PS-7300
PS-7900
