Craftsman 917.271823 Owner's Manual page 28

3. Choke should be closed. If it is not,
loosen casing clamp screw and move
choke cable until choke is completely
closed. Tighten casing clamp screw
securely.
4 Reassemble air cleaner.
Clamp
Quarter
2. With throttle control lever in slow
position, hold throttle lever against
idle speed screw and adjust idle
speed screw to obtain 1200 to 1400
RPM.
3. While still holding throttle lever
against idle speed screw, turn idle
mixture screw In (clockwise) until
engine begins to die and then turn out
(countemlockwise) until engine runs
rough. Turn screw to a point midway
between those two positions.
4. Continue to hold throttle lever against
Idle speed screw and adjust idle
speed screw to obtain 900 to 1200
RPM. Release throttle lever.
Casing
Screw
TO ADJUST CARBURETOR
The carburetor has been preset at the
factory and adjustment should not be
necessary. However, minor adjustment
may be required to compensate for
differences in fuel, temperature, altitude
or load.
If the carburetor does need adjustment,
proceed as follows:
In general, turning the mixture screw In
(clockwise) decreases the supply of fuel
to the engine giving a leaner fual/air
mixture. Turning the mixture screw out
(counterclockwise) increases the supply
of fuel to the engine giving a dcher fueV
air mixture.
IMPORTANT: Damage to the needles
and the seats in carburetor may result if
screw is turned in too tight.
PRELIMINARY SETI'ING -
1. Be sure you have a clean air rifler,
and the throttle control cable and
choke are adjusted properly (see
above).
2. With engine off turn idle mixture screw
In (clockwise) closing it finger tight
and then turn out (counterclockwise)
1-1/4 to 1-1/2 turns.
FINAL SE'FI'ING -
f. Start engine and allow to warm for five
minutes. Make final adjustments with
engine running and shift/motion
control lever in neutral (N) position.
ACCELERATION TEST-
5. Move throttle control lever from slow to
fast position. If engine hesitates or
dies, tum idle mixture screw out
(countemlockwise) 1/8 turn. Repeat
test and continueto adjust, if neces-
sary, until engine accelerates
smoothly.
High speed stop is factory adjusted. Do
not adjust - damage may result.
IMPORTANT: Never tamper with the
engine governor, which is factory set for
proper engine speed. Overspeeding the
engine above the factory high speed
setting can be dangerous. If you think the
engine-governed high speed needs
adjusting, contact a Sears or other
qualified service center, which has proper
equipment and experience to make any
necessary adjustments.
__ pvrJSIdle Speed
Screw
die Mixture
crew
o.?
Idle Speed_
Screw_ t_
Thr°_trr_r e
Screw
28