Storage; Idle Speed Adjustment; Acceleration Check; Low/High Speed Mixture Adjustment - Craftsman 358.797750 Operator's Manual

• Start the engine. Edge for 3 minutes
to warm the engine. The engine
must be at operating temperature be-
fore carburetor adjustments can be
performed correctly.
IDLE SPEED ADJUSTMENT
• Allow engine to idle.
• Adjust idle speed screw until the en-
gine continues to run without stalling
and without the blade shaft moving,
•Tum screw clockwise to increase en-
gine speed if the engine stallsor dies,
• Turn screw counterclockwise to
slow engine down and/or to keep
blade shaft from turning.
o Follow instructions in "Acceleration
Check,"
• No further adjustments are neces-
sary if blade shaft does not turn at
idle speed and if performance is sat-
is factory,
ACCELERATION CHECK
,' Allow engine to idle.
• Squeeze throttle trigger fully.
• if performanceissatisfactory,proceed
to "Low Speed Mixture Adjustment."
• If the engine does not accelerate
smoothly, turn the low speed mixture
screw counterclockwise a small
amount (no more than the width of
the slot in the adjusting screw). Re-
peat step until smooth acceleration
is obtained. Do not attempt to turn
the screws beyond the stops as
damage can occur.
NOTE: It may be necessary to repeat
"Idle Speed Adjustment" through "Ac-
celeration Check" to obtain correct ad-
justments.
LOW SPEED MIXTURE
ADJUSTMENT
• Allow engine to idle.
• Turn the low speed mixture screw
slowly clockwise until the speed
starts to drop. Do not attempt to turn
the screws beyond the stops as
damage can occur.
• Turn low speed mixture screw coun-
terclockwise until the speed in-
creases and then starts to drop
again. Do not attempt to turn the
screws beyond the stops as damage
can occur.
= Set low speed mixture screw at the
midpoint between the two positions.
• Readjust idle speed (see Idle Speed
Adjustment).
HIGH SPEED MIXTURE
ADJUSTMENT
CAUTION: Do not operate engine at
full throttle for prolonged periods while
making high speed adjustments as
damage to the engine can occur.
• Support the unit so the blade will not
make contact with any object, Do not
make adjustments from the blade
side of the unit.
° Allow the engine to idle, then
squeeze the throttle trigger fully.
NOTE= Perform the next two steps at
full throttle.
• Turn high speed mixture screw very
slowly counterclockwise until it stops.
Do not attempt to turn screws beyond
the stops as damage can occur.
° Turn the screw the minimum amount
clockwise until the engine runs
smoothly. Do not attempt to turn
screws beyond the stops as damage
can occur.
• If the engine accelerates and runs
smoothly, no further adjustments are
necessary.
• Recheck and follow steps in "Accel-
eration Check."
CAUTION: If the engine does not op-
erate according to these instructions
after repeating the adjusting steps, do
not use the unit. Take it to your Sears
Service Center.
IGNITION TIMING
Ignition timingis fixed, nonadjustable.
Prepare unit for storage at the end of
the season or if it wilt not be used for
30 days or more.
WARNING:
• Allow the engine to cool, and secure
unit before storing or transporting.
• Store unit and fuel in an area where
fuel vapors cannot reach sparks or
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