Craftsman EZ3 917.258863 Owner's Manual page 27

$ERWCE AND ADJUSTMENTS
TO ADJUST CARBURETOR (See Fig. 33)
The carburetor has been present at the factory and adjust-
ment should not be necessary. However, minor adjustment
may be required to compensate for differences in fuel,
temperature, altitude or Ioado 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 mixtureo Turning the adjusting needles out (coun-
terclockwise) increases the supply of fuel to the engine
giving a richer fue!/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 is adjustedproperly (see "TO ADJUST
THROTTLE CONTROL CABLE' in the Service and
Adjustments section of this manual).
o With engine off turn idlefuel adjusting needle in (clock-
wise) closing it finger tight and then turn out (counter-
clockwise) 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
osition, engine should idle at 1200 RPM. If engine
Ies 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 (clock-
wise) 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 necessary°
ACCELERATION TEST -
= Move throttle control lever from slow to fast position. If
engine hesitates or dies, turn idle fuel adjusting needle
out (counterclockwise) 1/8 turn. Repeat test and con-
tinue to adjust, if necessary, until engine accelerates
smoothly.
High speed stop is factory adjusted, Do not adjust-damage
may resulL
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 EQUIPMENT AND
EXPERIENCE TO MAKE ANY NECESSARY
ADJUSTMENTS,.
27