Craftsman 358.351210 Operator's Manual page 15

2.8 cu.in./46cc 2-cycle 20 in. bar gasoline chain saw
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5. Turn adjusting
screw onbar t o
move t he tensioning
rack asfaras
itwill
g o toward the front of the bar.
Tensioning Rac_/_
6.
Slide the guide bar rearward
until it
stops against the sprocket.
7.
Carefully
remove the new chain
from the package.
Hold chain with
the drive links as shown.
ge
Drive Links
8.
Place chain over and behind
clutch.
9.
Fit the bottom of the drive links be-
tween the teeth in the sprocket
nose.
10. Fit chain drive links into bar
groove.
11. Pull guide bar forward
until the
chain is snug in the guide bar
groove.
12. Install the bar clamp.
13. Install bar clamp nuts; finger tight-
en only. Do not tighten any further
at this point.
CHAIN ADJUSTMENT
See CHAIN TENSION in the MAINTE-
NANCE section.
REPLACE
FUEL FILTER
To replace the fuel filter, drain your unit
by running it dry of fuel; remove fuel
cap and its connected
retainer from
tank. Pull filter from tank and remove
from fuel line. Install new filter; reas-
semble
parts.
CARBURETOR
ADJUSTMENT
_,WARNING:
The chain will be
moving
during most of this procedure.
Wear your protective
equipment
and
observe all safety precautions.
During
the low speed mixture adjustment
re-
check idle speed after each turn of the
screw. The chain must not move at idle
speed.
Carburetor
adjustment
is critical and if
done improperly
can permanently
damage the engine as well as the car-
buretor. If you require further assis-
tance or are unsure about performing
this procedure,
call our customer
as-
sistance help line at 1-800-235-5878.
Old fuel, a dirty air filter, dirty fuel filter,
or flooding
may give the impression
of
an improperly adjusted
carburetor.
Check these conditions
before adjust-
ing the carburetor.
The carburetor
has been carefully
set
at the factory. Adjustments
may be
necessary
if you notice any of the fol-
lowing conditions:
• Chain moves at idle. See IDLE
SPEED-T under adjusting
procedure.
• Saw will not idle. See IDLE SPEED-T
and LOW SPEED MIXTURE-L under
adjusting
procedure.
• Engine dies or hesitates when it
should accelerate.
See ACCELERA-
TION CHECK under adjusting
procedure.
• Loss of cutting power. See HIGH
SPEED MIXTURE-H under adjusting
procedure.
There are three adjustment
screws on
the carburetor. They are labeled H, L,
and T.
ADJUSTING
PROCEDURE
CAUTION:
Do not force plastic limiter
caps on screws beyond the built-in
stops or damage will occur,
If carburetor
presets are not needed,
proceed to IDLE SPEED-T.
1. Turn both mixture screws clock-
wise until they stop, Then, turn
both screws counterclockwise
one
full turn,
2. Turn the idle speed screw clock-
wise until it stops. Now turn coun-
terclockwise
4-1/2 turns,
3.
Start engine and let it run for 3 min-
utes, then proceed to adjust
screws according
to the instruc-
tions below.
If engine performance
at initial settings is acceptable,
no
further adjustments
are necessary.
If engine does not start, refer to the
TROUBLESHOOTING TABLE. If still
unable to remedy situation, call
1-800-235-5878.
15

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