4. Turn adjusting screw onbar c oun-
terclockwise
tomove t he tension-
ing rack asfarasitwill g otoward
the front ofthe bar.
Tensioning
Rack _,/_
5. Slide g uide bar b ehind clutch d rum
until guide b ar s tops a gainst clutch
drum sprocket,
6. Remove the old chain.
7. Carefully remove the new chain
from the package. Hold c hain w ith
the drive l inks a sshown.
Drive Unks
8. Place c hain o ver a nd behind
clutch, fitting t he drive l inks i nthe
ctutch drum sprocket.
9. Fit t he bottom ofthe drive l inks b e-
tween the teeth i nthe sprocket in
the nose o fthe guide b ar.
10. F it c hain d rive l inks i nto bar
groove.
11. P ull guide b ar f orward until the
chain i ssnug inthe guide b ar
groove. Ensure all d rive links a re
inthe bar g roove.
12. I nstall the chain b rake,
13. I nstall chain b rake n uts; finger
tighten only. D onot t ighten any
further atthis point. Proceed to
CHAIN ADJUSTMENT.
CHAIN A DJUSTMENT
See CHAIN TENSION
inthe MAINTE-
NANCE
section.
CARBURETOR
ADJUSTMENT
_lJWARNING:
The chain w ilt b emov-
ing during most ofthis procedure.
Wear
your protective
equipment
and observe
all s afety precautions.
During the low
speed m ixture adjustment
recheck idle
speed after each t urn o fthe screw. The
chain m ust not m ove a tidle speed.
Carburetor
adjustment
iscritical and if
done i mproperly
can permanently
damage the engine asweti asthe car-
buretor, tfyourequire further assis-
tance o rare unsure about performing
this procedure,
call o ur c ustomer
as-
sistance help line at1-800-235-5878.
Old fuel. a dirty air f ilter, dirty fuel filter,
orflooding may give the impression
of
animproperly
adjusted carburetor.
Check these c onditions
before adjust-
ing the carburetor.
The carburetor
has been c arefully set
atthe factory. Adjustments
may be
necessary
ifyounotice any ofthe fol-
lowing conditions:
• Chain m oves atidle. See IDLE
SPEED-T
under adjusting procedure.
• Saw wilt n ot i dle. See IDLE S PEED-T
and LOW SPEED
MIXTURE-L
under
adjusting
procedure.
• Engine dies o rhesitates when i t
should accelerate.
See ACCELERA-
TION C HECK
under adjusting
procedure.
• Loss o fcutting power. See HIGH
SPEED
MiXTURE-H
under adjusting
procedure.
There a re three a djustment
screws on
the carburetor.
They a relabeled H,L,
and T,
ADJUSTING
PROCEDURE
CAUTION: Donot f orce plastic limiter
caps o nscrews beyond thebuilt-in
stops o rdamage witt o ccur.
Initial Setting8
1. Turn both mixture screws (L and H)
counterclockwise
until they stop.
2. Turn the idle speed screw (T)
clockwise
until it stops. Then turn it
counterclockwise
4-1/2 turns.
3. Start engine and let it run for 3 min-
utes. then proceed to adjust
screws according
to the following
instructions,
tf engine performance
at initial settings is acceptable,
no
further adjustments
are necessary.
If engine does not start, refer to the
TROUBLESHOOTING TABLE. tf still
unable to remedy situation, call
1-800-235-5878.
Idle Speed-T
Allow engine to idle. If the chain
moves, idle is too fast. tf the engine
stalls, idle is too slow. Adjust speed
until engine runs without chain move-
17
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