Dolmar PS-7900 - Manuel (Page 18)

18
PS-6400 PS-7300 PS-7900
PS-6400 H PS-7300 H PS-7900 H
WARNING:
This chain saw is capable of severe kickback that coult result in serious injury to the user. Do not operate this chain
saw unless you have extraordinary cutting needs and experience and specialized training for dealing with kickback.
Chain saws with significantly reduced kickback potential are available.
Technical data
Stroke volume cu. in (cm 3 ) 3.9 (64) 4.4 (72.6) 4.8 (78.5)
Bore inch (mm) 1.85 (47) 1.97 (50) 2.04 (52)
Stroke inch (mm) 1.45 (37) 1.45 (37) 1.45 (37)
Max. power at speed 1) hp / rpm 4.7 / 9,000 5.6 / 9,500 6.2 / 9,500
Max. torque at speed 1) Nm / rpm 4.2 / 6,500 4.8 / 7,000 5.2 / 7,000
Limit speed with guide bar and chain rpm 13,500 13,500 13,500
Idling speed rpm 2,500 2,500 2,500
Coupling speed rpm 3,200 3,200 3,200
Sound Pressure Level at the operator‘s ear
at full load according to ANSI B 175.1 db(A) 101.4 101.4 101.4
Sound Pressure Level at the bystander‘s position
(50 ft/15 m distance) according to ANSI B 175.1 db(A) 78.7 78.7 78.7
Carburetor (diaphragm carburetor) Type ZAMA with limiter caps
Ignition system Type electronic
Spark plug Type NGK BPMR 7A
Electrode gap inch (mm) .020 (0.5)
or spark plug Type BOSCH WSR-6F
Fuel consumption at max. load per ISO 7293 1) kg/h 1.72 2.33 2.3
Specific consumption at max. load per ISO 7293 1) g/kWh 500 510 505
Fuel tank capacity floz 25.36
Chain oil tank capacity floz 14.20
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
Sprocket pitch inch 3/8
Number of teeth Z 7
Chain type (see the Extract from the spare-parts list) 099
Pitch / Driving element strength inch 3/8 / .058
Guide bar, length of a cut inch 15 / 18 / 20 / 24 / 28
Guide-bar type (see the Extract from the spare-parts list)
Weight (fuel tank empty, without chain and guide bar) lbs 13.9 13.9 13.9
1) For models without decompression valve