To Adjust Choke Control; To Adjust Carburetor; Preliminary Setting; Final Setting - Craftsman EZ3 917.270781 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
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 Maintenance
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.
Clamp Screw-__
Quarter C_cle ___
_Swivel
Choke Close d-_,_
Casing _, _ _Choke
Clamp Sorew_ _ _<_'2_ :" Lever
TO ADJUST CARBURETOR
The carburetor has been preset at the fac-
tory and adjustment should not be neces-
sary. However, minor adjustment may be
required to compensate for differences in
fuel, temperature, altitude or load. Ifthe
carburetor does need adjustment, pro-
ceed as follows:
In general, turning the mixture screw in
(clockwise) decreases the supply of fuel
to the engine giving a leaner fuel/air mix-
ture. Turning the mixture screw 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 SETTING
• Be sure you have a clean air filter, and
the throttle control cable and choke are
adjusted properly (see above).
• 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 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.
• With throttle control lever in slow posi-
tion, hold throttle lever against idle
speed screw and adjust idle speed
screw to obtain 1200 to 1400 RPM.
• While still holding throttle lever against
idle speed screw, turn idle mixture
screw In (clockwise) until engine be-
gins to die and then turn out (counter-
clockwise) until engine runs rough.
Turn screw to a point midway between
those two positions.
• Continue to hold throttle lever against
idle speed screw and adjust idle speed
screw to obtain 900 to 1200 RPM. Re-
lease throttle lever.
ACCELERATION TEST
• Move throttle control lever from slow to
fast position. If engine hesitates or dies,
turn idle mixture screw out (counter-
clockwise) 1/8 turn. Repeat test and
continue to adjust, if necessary, until
engine accelerates smoothly.
High speed stop is factory adjusted. Do
not adjust - damage may result.
IMPORTANT: Never tamper with the en-
gine governor, which is factory set for
proper engine speed. Overspeeding the
engine above the factory high speed set-
ting can be dangerous. If you think the en-
gine-governed high speed needs adjust-
ing, contact your nearest authorized ser-
vice center/department, which has proper
equipment and experience to make any
necessary adjustments.
/Idle Speed
Screw
Throttle __ Idle Mixture
Lever_Screw
,,d,espo°d
Screw
IceMixture
_""_.j_ Th_rottle Lever
27