To Adjust Choke Control; To Adjust Carburetor; Acceleration Test - Craftsman EZ3 917.272950 Owner's Manual

TO ADJUST CHOKE CONTROL
The choke control has been preset at the
factory and adjustment should not be nec-
essary, check adjustment as described be-
low before loosening cable. If adjustment 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 Maintenance
section of this manual).
• Choke should be closed. Ifit is not, loosen
casing clamp screw and move choke
cable until choke is completely closed.
Tighten casing clamp screw securely.
• Reassemble air cleaner.
Closed for Full _
Choke- _. " ',_, It
--
TO ADJUST CARBURETOR
The carburetor has been present at the
factory and adjustment should not be nec-
essary. 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 adjusting needles in
(clockwise) decreases the supply of fuel to
the engine giving a leaner fuel/air mixture.
Turning the adjusting needles out (counter-
clockwise) 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 ifscrew is
turned in too tight.
PRELIMINARY SETTING -
• 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 turn idle fuel adjusting
needle in (clockwise) closing it finger tight
and then turn out (counterclockwise) 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. 28
• 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 en-
gine speed decreases and then turnout
(counterclockwise) approximately 3/4
turn to obtain the best low speed perfor-
mance.
• Recheck idle speed. Readjust if neces-
sary.
ACCELERATION TEST -
• Move throttle control lever from slow to
fast position. If engine hesitates or dies,
turn idle fuel adjusting needle out (coun-
terclockwise) 1/8 turn. Repeat test and
continue to adjust, if necessary, until en-
gine accelerates smoothly.
High speed stop is factory adjusted. Do not
adjust-damage may result.
IMPORTANT: Never tamper with the eninge
governor, which is factory set for proper
engine speed. Overspeeding the engine
above the factory high speed settng can be
dangerous. If you think the engine-governed
high speed needs adjusting, contact your
nearest authorized service center/depart-
ment, which has proper equipment and
experience to make any necessary adjust-
ments.