Craftsman 358.796920 Operator's Manual page 9

D= ENGBN ADJUSTMSNTS
1. CARBURETOR ADJUSTMENTS
The carburetor has been carefully adjusted at the
factory. Due to changes in altitude and operating
conditions, your carburetor may require adjusting.
To make the adjustment follow the procedure below
very carefully:
a PREPARATION
1) Use fresh fuel mix See Fuel Mixture page 7
2) Remove air filter
3) Turn mixture screw clockwise _ until
fully closed, but do not overtighteno Figure
12 Unscrew mixture screw one full turn
counterclockwise
4) Turn Idle Speed Screw clockwise
==,=-_ until it stops Do not overtighten.
Open screw three full turns counterclockwise
/
IDLE SPEED
ADJUSTMEN1
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Figure 12
N ES
b IDLE SPEED ADJUSTMENT
1) Start the engine and turn throttle control to
halfway between "Fast" and "Slow"
2 ) Operate the unit for 3 minutes to warm up
engine
3) Turn throttle control counterclockwise
to slow setting
4) Adjust Idle Speed Screw:
Clockwise _ if the engine stalls:
Counterclockwise _ to slow engine
down
5 ) Adjust the Idle Speed Screw until the engine
idles as slow as possible without the engine
stalling
t CAUTION:] The mixture setting is a highly
critical adjustment. If set incorrectly,
permanent damage will occur to the
engine. Do not operate engine at fast
throttle fdr prolonged periods while making
the mixture adjustment.
c MIXTURE ADJUSTMENT:
1) Adjust throttle knob to "Fast" position
2 ) Turn the Mixture Screw slowly clockwise
until the engine speed is reduced
Note position
3) Turn the screw slowly counterclockwise
_===_ Stop when the engine just begins
to run rough
4) Turn the screw slowly the minimum amount
clockwise ==="_ until the engine runs
smoothly
NOTE 1: The mixture screw should be in the
range of 3/4 to 1-1/4 turns open
NOTE 2: For the best engine performance, it
is better to run a slightly rich mixture setting
(counterclockwise _ )than too lean a
setting
d REPLACE AIR FILTER
2. SPARK PLUG (Cat. No. 71-36403)
Check spark plug periodically and clean or replace
as necessary. After cleaning, reset the electrode gap
to "025,
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