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TECHNICAL DATA
Technical data
Note 1: Noise emissions in the environment measured as sound power (L
WA
) in conformity with EC directive 2000/14/EC.
Note 2: Equivalent sound pressure level, according to ISO 7182, is calculated as the time-weighted energy total for noise
pressure levels under various working conditions with the following time distribution: 1/3 idling, 1/3 max. load, 1/3 max.
speed.
Note 3: Equivalent vibration level, according to ISO 22867, is calculated as A (8).
T425
Engine
Cylinder displacement, cm
3
25,4
Cylinder bore, mm 34
Stroke, mm 28
Idle speed, rpm 2900
Recommended max. fast idle speed, rpm 12500
Power, kW/ rpm 0,96/9000
Ignition system
Manufacturer of ignition system Ikeda Denso
Type of ignition system CD
Spark plug NGK BPMR 7A/
Champion RCJ 7Y
Electrode gap, mm 0,65
Fuel and lubrication system
Manufacturer of carburettor Walbro
Carburettor type WT 804
Fuel tank capacity, litre 0,23
Oil pump capacity at 8,500 rpm, ml/min 3-9
Oil tank capacity, litre 0,16
Type of oil pump Automatic
Weight
Chain saw without bar or chain, empty tanks, kg 2,99
Noise emissions (see note 1)
Sound power level, measured dB(A) 109
Sound power level, guaranteed L
WA
dB(A) 110
Sound levels (see note 2)
Equivalent sound pressure level at operator’s ear, measured
according to relevant international standards, dB(A) 95,7
Vibration levels (see note 3)
Front handle, m/s
2
3,4
Rear handle, m/s
2
3,3
Chain/bar
Standard bar length, inch/cm 10”/25
Recommended bar lengths, inch/cm 10”/25
Usable cutting length, inch/cm
Chain speed at max. power, m/sec 17,1 or 15,2
Pitch, inch/mm 3/8” /9,52 or 1/4” /6,25
Thickness of drive links, inch/mm 0,050/1,3
Number of teeth on drive sprocket 6 or 8