Carburetor Adjustments - Husqvarna BKS 4615 Operating Instructions Manual

File Holder
File
Cutter
Depth Gauge
S Align the 30˚ file holder marks paral-
lel with the bar and to the center of the
chain.
30˚
Cutter
File Holder Line
S Sharpen cutters on one side of the
chain first. File from the inside of each
cutter to the outside. Then, turn the
chain saw around and repeat the pro-
cess for the other side of the chain.
S File on the forward stroke only. Use 2
or 3 strokes per cutting edge.
S Keep all cutters the same length
when filing.
S File enough to remove any damage
to cutting edges (side plate and top
plate of cutter).
Remove Damage
All Cutters
Same Length
Top Plate
S File chain to meet the specifications
as shown.
80˚
30˚
Hook Angle
Rounded
Corner
Right
Too Much Hook Angle
90˚
WARNING
angle according to the manufacturer's specifi-
cations for the chain you are using. Improper
hook angle will increase the chance of kick-
Cutter
back which can result in serious injury.
4. Check and lower depth gauges.
Depth Gauge Tool
S Place gauge tool on cutter.
S If the depth gauge is higher than the
S Maintain rounded front corner of
If you require further assistance or are unsure
about performing this procedure, contact your
authorized service dealer.

CARBURETOR ADJUSTMENTS

WARNING
during most of this procedure. Wear your pro-
tective equipment and observe all safety pre-
Side Plate cautions. The chain must not move at idle
speed.
The carburetor has been carefully set at the
factory. Adjustments may be necessary if you
notice any of the following conditions:
S Chain moves at idle. See IDLE SPEED- -T
60˚
adjusting procedure.
S Saw will not idle. See IDLE SPEED- -T ad-
justing procedure.
Idle Speed---T
Allow engine to idle. If the chain moves, idle is
too fast. If the engine stalls, idle is too slow. Ad-
just speed until engine runs without chain
movement (idle too fast) or stalling (idle too
0,65 mm
slow). The idle speed screw is located in the
area above the primer bulb and is labeled T.
S Turn idle speed screw (T) clockwise to in-
crease engine speed.
S Turn idle speed screw (T) counterclockwise
to decrease engine speed.
14
Squared Off
Corner
Wrong
: Maintain the proper hook
File
Depth Gauge
depth gauge tool, file it level to the top of
the depth gauge tool.
depth gauge with a flat file.
NOTE:
The very top of the depth
gauge should be flat with the front
half rounded off with a flat file.
: The chain will be moving