Owner`s manual

18
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 signicantly reduced kickback potential are available.
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
Specic consumption at max. load per ISO 7293
1)
g/kWh 500 510 505
Fuel tank capacity oz 25.36
Chain oil tank capacity oz 14.20
Mixture ratio (fuel/two-stroke oil)
- when using MAKITA synthetic oil 50:1
- when using other synthetic oil
(oil quality must be JASO FC or ISO-L-EGD) 50:1
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 3/8 / .050
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
Technical data
DCS6400, 6420 DCS7300 DCS7900
DCS6401, 6421 DCS7301 DCS7901