Replace Fuel Filter; Carburetor Adjustment - Craftsman 358.797560 Instruction Manual

1. Twist, then pull off spark plug boot.
2. Remove spark plug from cylinder
and discard.
3. Replace with Champion RCJ-6Y
spark plug and tighten with a 3/4
inch socket wrench.
4. Reinstall the spark plug boot.
REPLACE FUEL FILTER
To replace fuel filter, drain unit by run-
ning it dry of fuel, then remove fuel
cap/retainer assembly from tank. Pull
filter from tank and remove it from the
fuel line. Install new fuel filter on fuel
line; reinstall parts.
We recommend all 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
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 or fuel filter, or
flooding may give the impression of an
improperly adjusted carburetor. 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
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.
There are two adjustment screws on
the carburetor. They are located next
to the primer bulb.
Idle
Speed
Mixture Screw
(with Limiter Cap)
ADJUSTING PROCEDURE
CAUTION: DO not force plastic limiter
caps on screws beyond the built-in
stops or damage will occur.
Initial Settings
1. Turn the mixture screw counter-
clockwise until it stops.
2. Turn the idle speed screw clock-
wise until it stops. Then turn coun-
terclockwise 4 1/2 turns.
3. Start motor 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
TROUBLESHOOTING TABLE. If still
unable to remedy situation, call
1-800-235- 5878.
Idle Speed "IDLE"
Allow engine to idle. Adjust speed until
engine runs without stalling.
• Turn IDLE screw clockwise to in-
crease engine speed.
• Turn IDLE screw counterclockwise to
decrease engine speed.
Mixture "MIX"
Allow engine to idle. Then accelerate
the engine and note performance. If
engine hesitates, bogs down, or
smokes during acceleration, turn MIX
screw clockwise in 1/16-turn incre-
ments until performance is satisfactory.
Repeat this procedure as necessary
for proper adjustment. After completing
adjustments, check for acceleration.
Reset if necessary.
Acceleration Check
If engine dies or hesitates instead of
accelerating, turn MIX screw counter-
clockwise until you have smooth accel-
eration.
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