Carburetor Adjustment; Adjusting Procedure - Craftsman BRUSHWACKER 358.795050 Operator's Manual

CARBURETOR ADJUSTMENT
WARNING: The trimmer head or
blade will be spinning dudng most of this
procedure. Wear protective equipment
and observe all safety precautions. After
making mixture adjustment, resheck-
.idle speed.
Carburetor adjustment is cdfical 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, a dirty fuel fil-
ter, or flooding may give the impres-
sion of an improperly adjusted carbu-
retor. Check these conditions before
adjusting the carburetor.
The carburetor has been carefully set
at the factory. Adjustments may be
necessary if you notice any of the fol-
lowing conditions:
• Engine will not idle. See =Idle Speed"
under adjusting procedure.
• Engine dies or hesitates instead of
accelerating. See "Acceleration
Check" under adjusting procedure.
• Loss of cutting power. See "Mixture
Adjustment" under adjusting
procedure.
There are three adjustment screws on
the carburetor. The low speed adjust-
ment screw is marked with the letter L,
and the high speed adjustment screw
is marked with the letter H. The third
screw is the idle adjustment screw.
Adjuslm_ent =H" Adjustment'1."
Idle Screw Adjustment
ADJUSTING PROCEDURE
Idle Speed Adjustment
Allow engine to idle. Adjust speed until
engine runs without stalling.
• Al_o_P_ine to idle. Be sure trimmer
line is extended to the maximum
length allowed by the line limiter.
• Adjust idle speed screw until engine
continues to run w'Rhout stalling.
• Turn the screw clockwise to in-
crease engine speed if the engine
stalls or dies.
•Tum screw counterclockwise to
slow'engine down.
• Follow instructions in "Acceleration
Check."
• No further adjustments am necessary
if performance is sstisfactory and trim-
mer head does not turn at idle speed.
Low Speed Adjustment "L"
When makingcarburetor adjustments,
do not force plastic limitercaps beyond
stops or damage will occur.
• Allow the engine to idle.
• Turn screw "L"slowlyclockwise until
the speed begins to drop, Note the
positionof the screw. Do not attempt
to adjust beyond the stops as dam-
age can occur.
• Slowly tum the screw countemlock-
wise untilthe speed increases and
then begins to drop.
• Adjustthe screw to the midpointbe-
tween the two positions.
• Check the acceleration by following
the steps outlined under ACCELERA-
TION CHECK.The tdmmer head must
not tum at idle speed.
High Speed Adjustment "H"
CAUTION: Do not operate engine at
full speed for prolonged pedods while
making mixture adjustments as dam-
age to the engine can occur.
When making carburetor adjustments,
do not force plastic limitercaps beyond
stops or damage will occur.
• Support lower end of the unit so that
it is off the ground and will not make
contact with any objects. Be sure the
trimmer line is extended to maximum
length allowed by the line limiter.
• Start the engine and allow to idle.
• Squeeze the throttle tdgger fully.
• Keep unitrunningat full speed; turn
screw "H"very slowly clockwise until
the speed begins to slow down.
• Do not let go of the throttletdgger,
and tum screw counterclockwise un-
til the engine beginsto run roughly.
• Still holdingthe throttle trigger, turn
the screw slowly a small amount until
the engine beginsto run smoothly.
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