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MAINTENANCE
Carburetor
Adjustment
_t
BE CAREFUL!
The chain will be moving during this
procedure
1
Stop
the engine
2
Remove
the
carburetor
cover
(Figure
7)
Turn
the high
speed
(Figure
8)
and
low
speed
mixture
screws
clockwise
_
(Figure
8) until
they stop
Don't
tighten
them,
you may damage
the needle seats!
3.
Turn
the high speed and low speed mixture
screws one full
turn counterclockwise
4
Start
the engine
If it stops, increase
the idle speed !Figure
8) by turning
the idle speed screw clockwise
_
, Keep
dirt
and sawdust
away from
the carburetor
while
the cover
is removed,
5,
Run
the
engine
for
a few
minutes
to
bring
it
up
to
operating
temperature
6
Set
the
idle
speed
as fast as possible
without
the chain
moving
Turn
the idle
speed screw
clockwise
_=_
for
faster
idle. counterclockwise
_
for slower
idle
7
Squeeze
the trigger
quickly
If the engine stops,
restart
it
The
engine
should
accelerate
without
hesitating
when
the
trigger
is squeezed
If
it does
not,
turn
the
tow
speed
mixture
screw
counterclockwise
_
1/16
of a turn
and
check
the acceleration
again
If the idle speed slows while
adjusting
the low speed mixture,
reset the idle speed as in
step 6 Continue
step 7 until
acceleration
is smooth
8
Make
a test cut
with
the saw (keep
sawdust
out
of
the
carburetor!)
9
If
the engine
seems to smoke
excessively
in the cut,
turn
the high
speed
mixture
screw
clockwise
_
1/16
of a
turn
Repeat
step
8 and 9, if necessary
WARNING:
The
high
speed needle
must
never
be less than
7/8 turn
open
Too
lean of a setting
will quickly
ruin the engine
10
If
the
engine
seems
to weaken
or
lose
power
in
the
cut,
turn
the
high
speed
mixture
screw
counterclock-
wise
_
1/16
of a turn
at a time
until
the saw cuts
smoothly
The
high
speed
mixture
screw
should
not
be
open
more
than
tY& turns
(counterclockwise
_
)
from
the stopped
position
in step 2
1 1
Reset the idle speed (see step 6)
Replacing
carburetor
cover
_'
Incorrect
placement
of the cover will prevent
the choke
from
working
t
Move
the choke
knob
a[t the way
in the choke
direction
2
Move
the choke
shutter
to the choke
closed position
(See
Figure
8)
3
Place the cover on the saw and tighten
the screws
4
Check
the operation
of the choke
If the knob
sticks
or
won't
move,
remove
the cover
and repeat
the procedure
above
Air Filter
Clean
the air filter
after every
t0 tanks of gas or every
5 hours
of operation.
1
Remove
the
carburetor
cover
and
pull
out
the
filter
(Figure
9)
2
DO
NOT
clean
your
filter
in gasoline
or other
flammable
solvent
Blow
the dirt
off
with
compressed
air or wash
filter
in soap and water
3. Replace
the filter
and carburetor
cover
I /
Choke Closed
High Speed
Mix Screw
Idle Speed
Screw
Low Speed
Mix Screw
Air Filter
Figure 7
Figure 8
Figure 9
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