To Adjust Choke Control; Preliminary Setting; Final Setting; Acceleration Test - Craftsman EZ 917.273121 Owner's Manual

TO ADJUST CHOKE CONTROL
The choke control has been preset at the
factory and adjustment should not be nec-
essay, check adjustment as described
below before loosening cable. If adjust-
ment is necessary, proceed as follows:
• With engine not running, move choke
control (located on dash panel) to full
choke position.
• Remove air cleaner cover, filter and car-
tridge plate to expose carburetor choke
(See "AIR FILTER" in the Customer Re-
sponsibilities section of this manual).
• 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 se-
curely.
• Reassemble air cleaner.
Closed for
Choke
TO ADJUST CARBURETOR
The carburetor has been present at the
factory and adjustment should not be nec-
essary. However, rfiinor 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, tuming the adjusting needles
-in (clockwise) decreases_the supply of fuel
to the engine giving a leaner fuel/air mix-
ture. Tuming the adjusting_eedles out
(counterclockwise) increases the supply of
fuel to the engine giving a richer fuel/air
mixture.
IMPORTANT: Damage to the needles
and the seats in carburetor may result if
screw is turned in too tight.
PRELIMINARY SEi-I'ING -
• Be sure you have a clean air filter, and
the throttle control cable is adjusted
properly (see =TO ADJUST THROTTLE
CONTROL CABLE" in the Service and
Adjustments section of this manual).
• With engine off tum idle fuel adjusting
needle in (clockwise) closing it finger
tight and then turn out (counterclock-
wise) 1 turn.
FINAL SETTING -
• Start engine and allow to warm for five
minutes. Make final adjustments with
engine running and shift/motion control
lever in neutral (N) position.
• The high idle is set at the factory and
cannot be adjusted.
• Idle speed setting - With throttle control
lever in slow position, engine should
idle at 1200 RPM. If engine idles too
slow or fast, turn idle speed adjusting
screw in or out until correct idle is
attained.
• Idle fuel needle setting - With throttle
control lever in slow position, turn idle
fuel adjusting needle in (clockwise) until
engine speed decreases and then turn
out (counterclockwise) approximately
3/4 turn to obtain the best low speed
performance.
• Recheck idle speed. Readjust if neces-
sary.
ACCELERATION TEST -
• Move throttle control lever from slow to
fast position. If engine hesitates or dies,
tum idle fuel adjusting needle out
(counterclockwise) 1/8 turn. Repeat test
and continue to adjust, if necessary,
until engine accelerates smoothly.
High speed stop !sofactory adjusted. Do
not adjust-damage may result.
IMPORTANT: Never tamper with the
engine govemor, which is factory set for
proper engine speed. Overspeeding the
engine above the facory high speed set-
ting can be dangerous. If you think the
engine-governed high speed needs
adjusting, contactyour nearest authorized
service center/department, which has
proper equipment and experience to make
any necessary adjustments.
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