Husqvarna Z 254 Manual

English Ð 31
Muffler
The muffler is designed in
order to reduce the noise level
and to direct the exhaust
gases away from the operator.
The exhaust gases are hot
and can contain sparks, which
may cause fire if directed
against dry and combustible
material. Some mufflers are
equipped with a special
screen. If your saw has this
type of muffler, you should
clean the screen at least once
a week. This is done with a
wire brush.
CAUTION! The screen must be replaced, if damaged. The saw
will be overheated, if...

32 Ð English
MAINTENANCE
Cooling system
To obtain the lowest possible running temperature the saw is
equipped with a cooling system.
The cooling system
consists of:
1. Air intake on the starter
unit.
2. Air guide plate.
3. Fan blades on the
flywheel.
4. Cooling fins on the
cylinder.
5. Cylinder cowling
(supplies cold air over
the cylinder).
Clean the cooling system with a brush once a week, more often
in demanding conditions. A dirty or blocked cooling system
results in the saw overheating which causes...

English Ð 33
Weekly maintenance
1. Check that the AV
elements are not soft or
torn.
2. Lubricate the clutch drum
bearing.
3. File off burrs, if any, on
the sides of the bar.
4. Clean the spark plug and
check the gap.
The correct gap is 0.5 mm
(.020 inch).
5. Check the starter and the
recoil spring. Clean the
fins on the flywheel.
6. Clean the cooling fins on
the cylinder.
7. Clean or change the
screen in the muffler.
8. Clean the carburettor
body and air box.
MAINTENANCE
Below you will find some general...

34 Ð English
254XP
3,3/54
1,77/45
1,34/34
2.700
13.800
2,9/9.300
Electrolux
ET
Champion
RCJ 7Y
.012/0,5
Walbro
HDA35B
1,2/0,6
6,5-13,5
0,6/0,3
Automatic
 11,9/5,4
257
3,4/57
1,81/46
1,34/34
2.700
13.800
2,7/9.000
Ducati
ET
Champion
RCJ 7Y
.012/0,5
Walbro
HDA120
1,2/0,6
6,5-13,5
0,6/0,3
Automatic
 12,3/5,6
254XP
100
108
3,0
4,9
257
99,5
109
3,5
5,8
Noise levels
Equivalent (see note 1) noise
pressure level at operatorÕs
ear, measured according to
relevant international
standards, dB(A).
Equivalent (see...

English Ð 35
262XP
3,8/62
1,89/48
1,34/34
2.700
13.500
3,4/9.600
Ducati
ET
Champion
RCJ 7Y
.012/0,5
Walbro
HDA120
1,2/0,6
6,5-13,5
0,6/0,3
Automatic
 12,7/5,8
262XP
100
109
3,3
5,4
15/38
13/33Ð20/51
11-19/
30-49
18,5
.325/ 3/8
.058/1,5
7
TECHNICAL DATA
Engine
Cylinder volume, cu.in/cm3
Cylinder bore, inch/mm
Stroke, inch/mm
Idle speed, rpm
Recommended max.
speed, unloaded, rpm
Power, kW
Ignition system
Manufacture
Type of ignition system
Spark plug
Electrode gap, inch/mm
Fuel and lubrication
system...