Adjusting Procedure - Craftsman 358.798980 Operator's Manual

----- cove,
• Clean the cover and the area around
it to keep debris from faTlinginto the
carburetor chamber when the cover
is removed.
* Remove parts as illustrated.
. Wash the filter in soap and water.
o Allow filter to dry.
• Replace parts.
REPLACE SPARK PLUG
Replace spark plug each year to en-
sure the engine starts easier and runs
better. Set spark plug gap at .025 in_
Ignition timing is fixed, nonadjustabre.
• Twist, then pull off spark plug boot.
• Remove spark plug from cylinder and
discard.
• Replace with Champion RCJ-8Y
spark plug and tighten with a 3/4 in.
socket wrench (10-12 ft.-Ibs).
• Reinstall the spark plug boot.
We recommend att service and adjust-
ments not listed in this manual be per-
formed by your Sears Service Center.
CARBURETOR ADJUSTMENT
Carburetor adjustment is critical and if
done improperly can permanently dam-
age the engine as well as the carbure-
tor. If you require further assistance or
are unsure about performing this pro-
cedure, call our customer assistance
help line at 1-800-235-5878.
Old fue!, a dirty air filter, a dirty tuel fil-
ter, 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:
° Engine will not idle. See "Idle Speed"
and "Mixture" under adjusting
procedure.
• Engine dies or hesitates instead of
accelerating. See "Acceleration
Check" under adjusting procedure.
• Loss of power. See "Mixture" under
adjusting procedure.
CARBURETOR PRESETS
When making carburetor preset adjust-
ments, do not force plastic limiter caps
beyond the stops or damage will occur.
If carburetor presets are not needed.
proceed to "ADJUSTING PROCEDURE,
Idle Speed."
TO adjust presets:
• Turn the mixture screw countemlock-
wise until it slops,
-8
• Turn the idle speed screw clockwise
until it stops. Now turn counterclock-
wise 4-1/2 turns.
Start motor, let it run for 3 minutes, and
proceed to the adjustment section, if
engine does not start, refer to trouble-
shooting chart or call 1-800-235-5878.
If engine performance is acceptable at
the preset posffions, no further adjust-
ments are necessary.
cove, .
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(with Ltmiter
Cap)
ADJUSTING PROCEDURE
Idle Speed "IDLE"
Allow engine to idle. Adjust speed until
engine runs without stalling.
• Turn clockwise to increase engine
speed if engine stalls or dies.
= Turn counterclockwise to decrease
speed.
No further adjustments are necessary if
performance is satisfactory.
Mixture "MIX"
Allow engine to idle. Then accelerate
the engine and note performance, tf
engine hesitates, bogs down, or
smokes during acceleration, lure mix-
lure screw clockwise in 1/t6-tum incre-
ments until performance is satisfactory.
Repeat this procedure as necessary