TECHNICAL DATA
254XP257254XP257
EngineNoise emissions
Cylinder volume, cu.in/cm33,3/543,4/57(see note 1)
Cylinder bore, inch/mm1,77/451,81/46Sound power level, measured
Stroke, inch/mm1,34/341,34/34dB(A)111111
Idle speed, rpm2 7002 700Sound power level, guaranteed
Recommended max.L dB(A)112112WA
speed, unloaded, rpm13 80013 800
Power, kW3,0/ 9 3002,7/9 000Sound levels
(see note 2)
Ignition systemEquivalent sound pressure level
ManufactureFHPFHPat operatorOs ear, measured
Type of ignition systemETETaccording to relevant internatio-
Spark plugChampionChampionnal standards, dB(A)10099,5
RCJ 7YRCJ 7Y
Electrode gap, inch/mm0,020/0,50,020/0,5Vibration levels
(see note 3)
2
Fuel and lubrication systemFront handle m/s4,04,0
2
ManufacturerWalbroWalbroRear handle m/s8,28,2
Carburettor typeHDA35BHDA120
Fuel capacity, US pint/litre1,2/0,61,2/0,6Chain/bar
Oil pump capacity at 8500 rpm,Standard bar length, inches/cm15"/3815"/38
ml/min6,5-13,56,5-13,5Recommended bar lengths,
Oil capacity, US pint/litre0,6/0,30,6/0,3inches/cm13-20"/33-5113-20"/33-51
Type of oil pumpAutomaticAutomaticUsable cutting length, inches/cm11-19"/30-4911-19"/30-49
Chain speed at max.
Weightpower, m/sec17,917,3
Without bar and chain, Lbs/kg 11,9/5,4 12,3/5,6
Pitch, inches0,325"/8,250,325"/8,25
3/8"/9,523/8"/9,52
Thickness of drive link, inch/mm0,050"/1,30,050"/1,3
0,058"/1,50,058"/1,5
Number of teeth on drive
Bar and chain combinations
sprocket77
The following combinations are CE approved.
BarChain
Length,Pitch,Max.Note 1: Noise emissions in the environment measured as sound
inchesinchestip radiuspower (L) in conformity with EC directive 2000/14/EC.
WA
130,32510THusqvarna H30Note 2: Equivalent sound pressure level, according to ISO
150,32510THusqvarna H30
7182, is calculated as the time-weighted energy total for sound
160,32510THusqvarna H30
pressure levels under various working conditions with the
180,32510THusqvarna H30
following time distribution: 1/3 idling, 1/3 max. load, 1/3 max.
150,32510THusqvarna H25speed.
160,32510THusqvarna H25
180,32510THusqvarna H25Note 3: Equivalent vibration level, according to ISO 7505, is
calculated as the time-weighted energy total for vibration levels
150,32510THusqvarna H21
under various working conditions with the following time
160,32510THusqvarna H21
180,32510THusqvarna H21distribution: 1/3 idling, 1/3 max. load, 1/3 max. speed.
163/811THusqvarna H42
183/811THusqvarna H42
203/811THusqvarna H42
L
1
5
TypeInchInch/mmInch/mmDegree!Degree!Degree!Inch/mmInch/cm: dl
H300,325"0,050"/1,33/16" /4,885!30!10!0,025"/0,6513"/33:56 15"/38:64
16"/40:66 18"/45:72
H250,325"0,058"/1,53/16" /4,885!30!10!0,025"/0,6515"/38:64 18"/45:72
H21
H423/8"0,058"/1,57/32" /5,560!25!10!0,025"/0,6515"/38:56 16"/40:60
18"/45:68 20"/50:72
34 � English |