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42
6.1-
General
Maintenance
A
WARNING!
Before performing any
maintenance,
repair,
or
cleaning work
on
the
machine,
make
sure tbe
engine and cutting
attachment
are completely
stopped.
Disconnect
the spark plug wire before performing service or maintenance work
A
WARNING'
Non-standard
parts
may
not
operate
properly with your
unit
and may cause damage
and lead to personal inj ury
6.1.1-
Muffier
A
WARNING!
Operating the
engine
without
a
muffler
or
with
a
muffler that
is
damaged
or
improperly
installed
can increase engine noise sufficiently
to
lead
to
hearing loss.
This
machine
must never
be operated with a faulty
or
missing spark
arrestor
or
muffler.
Fig.Et7
I.
Idle adjusting screw
Fig.E16
Fig.E15
VI.
MAINTENANCE
5.6-
Adjusting
the carburetor
A
WARNING!
The
cutting
attachment must
never rotate
at
engine
idle
speed.
The engine must return to idle
speed
whenever
the throttle
trigger
is
released Idle
speed
is
adjustable
and
must
be set low
enough
to
penn
it the
engine
clutch to disengage
the
chain
saw
when
throttle
trigger
is released.
Check
and Adjust
Idle
Speed
I.
Start
the engine
and
allow
it
to
idle two or
three minutes,
or
until
it
warms up.
2.lfthe
cutting
attachment rotates
at
engine
idle,
reduce
idle
speed by
turmng the idle
adj
listing screw
counter
clockwise
as necessary.
(Fig.E
17)
Important!
Use a
tachometer,
if
one is
available,
to
set
engine
idle.
Standard Idle
speed
is:
3000
±
200.
3.
If
the engine is
stalling
and won',
idle,
increase idle
speed
by turning
the
idle adjustment screw clockwise.
Note:
The mixture of the carburetor on
this unit
cannot be adjusted
5.5-
Stop
the
engine
A
WARN[NG!
The cutting
attachment
can
continue rotating
after the
engine is
switched
om
I.
Cool
the
engine
by allowing
it
to idle for
two or
three
minutes.
2.
Slide
the
ignition
switcb to
the "0"
or
STOP
position.
See Fig.E 16
5.4-
Starting a
flooded engine
I. Discounect the
spark
plug lead and then use
the
spark
plug
wrench
to remove the spark plug (tum counterclockwise
to
remove)
See Fig.E15
If the spark
plug is
fouled
or
soaked
with
fuel,
clean
the plug
as nece ssary
2. Open the choke
and
fully depress the
throttle
trigger
with
your
left hand,
then pull
the starter handle rapidly with your
right
hand
to clear excess
fuel from the
combustion
chamber.
CAUTION!
Incorrect
spark
plug
installation
can
result
in
serious
engine damage
3. Reinstall the spark plug and tighten
it
firmly.
If a torque wrench
is available,
torque the spark
plug
to
16.7-18.6N.m.
4.
Repeat
the starting procedure for a
warm
engine.
5.
If
the engine
still
fails
to start inquire
with
an
authorized
and qualified
service
centre.
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