Craftsman EZ3 917.258671 Owner's Manual page 27

,_ i ii i j ill illllllllllllll_ _ .................. i ii/i,,ll, l,i i_l_ i i i IllL,, i iii ii i i ii i ii illl
VICE AND ADJUSTMENTS
i,,, i i i i i ill ................
TO ADJUST CHOKE CONTROL (See Fig. 34)
The choke control has been preset at the factory and
adjustment should not be necessary. Check adjustment as
described below 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 cartridge plate to
expose carburetor choke (see "AIR FILTER" in the
Customer Responsibilities section of this manual).
• Choke should be closed_ If it is not, loosen casing
clamp screw and move choke cable until choke is
completely c!osed. Tighten casing clamp screw se-
curelyo
• Reassemble air cleaner.
CHOKE
CLOSED
SCREW
CHOKE
LEVER
i
FIG. 34
TO ADJUST CARBURETOR (See Figs. 35 &
36)
The carburetor has been preset at the factory and adjust-
ment should not be necessary'. However, minor adjust-
merit may be required to compensate for differences in fuel,
temperature, altitude or load. If the carburetor does need
adjustment, proceed as fo!lows:
In general, turning the mixture screw in (clockwise) de-
creases the suppIy of fuel to the engine giving a leaner fueV
air mixture Turning the mixture screw out (counterclock-
wise) 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 lF SCREW IS
TURNED tN 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 engtne off turn Ldlemixture _crew in (cluckwi_e)
closing it finger tight and then turn out (counterclock-
wise) 1-1/4 to 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 position, hold throttle
lever against idle speed screw and adjust idle speed
screw to obtain t200 to 1400 RPM
• While still holding throttle lever against idle speed
screw, turn idle mixture screw in (clockwise) until
engine begins to die and then turn out (counterclock _
wise) 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
Release throttle levero
ACCELERATION TEST -
° Move throttle control lever from slow to fast position° If
engine hesitates or dies, turn idle mixture screw out
(counterclockwise) 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 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 YOUR
NEAREST AUTHORIZED SERVICE CENTER/
DEPARTMENT, WHICH HAS PROPER EQUIPMENTAND
EXPERIENCE TO MAKE ANY NECESSARY
ADJUSTMENTS
IDLE SPEED
SCREW
IDLE MIXTURE
SCREW
THROTTLE
LEVER
FIG. 35
IDLE MIXTURE
LEVER SCREW
27
FIG. 36