Throttle Control Cable - Craftsman 917.254531 Owner's Manual

SERVICE AN
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ENGINE
TO ADJUST THROTTLE CONTROL CABLE
(See Fig. 29)
The throttle 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 throttle control lever
from "SLOW" to "CHOKE" position° Slowly move lever
from "CHOKE" to "FAST" position_
• Check that holes"A" in governor control lever and hole
in governor plate line-up_ if holes "A" are not aligned,
loosen clamp screw and move throttle cable until holes
are aligned. Tighten clamp screw securely.
GOVERNOR
CONTROL LEVER
GOVERNOR
CONTROL PLATE
HOLES "A" CLAMP
SCREW
............................... j_ =l ..... m
ADJUSTMENTS
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FINAL SET'f'tNG -
• Start engine and allow to warm for five minutes. Make
final adjustments with engine running and shiftj'motion
control lever in "NEUTRAL position.
• Move throttle control lever to "SLOW" position. With
finger, rotate and hold throttle lever against idle spee_
screw_ Turn idle speed screw to attain t750 RPM.
. While still holding throttle lever against idle speed
screw, turn idle mixture valve in (clockwise) until en-
gine begins to die and then turn out (counterclockwisel
until engine runs rough. Turn valve to a point midway
between those two positions° Release throttle lever.
ACCELERATION TEST -
• Move throttle control lever from "SLOW" to "FAST'
position. If engine hesitates or dies, turn idie mixture
valve out (counterclockwise) 1/8 turn. Repeat test anc
continue to adjust, if necessary, until engine acceler
ates smoothly.
High speed stop is factory adjusted_ Do not adjust
damage may result°
IMPORTANT; NEVER TAMPER WtTH THE ENGINE
GOVERNOR, WHICH iS FACTORY SET FOR PROPEF
ENGINE SPEED, OVERSPEEDING THE ENG1NEABOVE
THE FACTORY HIGH SPEED SETTING CAN BI!
DANGEROUS. IF YOU THINK THE ENG1NE-GOVERNE[
HIGH SPEED NEEDS ADJUSTING, CONTACT YOUF
NEAREST AUTHORfZED SERVICE CENTER, WHICH HA.c
PROPER EQUIPMENT AND EXPERIENCE TO MAKE AN _
NECESSARY ADJUSTMENTS
FIG. 29
TO ADJUST CARBURETOR (See Fig. 30)
The carburetor has been preset at the factory and adjust-
ment should not be necessary. However, minor adjust-
ment may be required to compensate for differences in fuel,
temperature, altitude or load If the carburetor does need
adjustment, proceed as follows:
In general, turnig idle mixture valve In (clockwise) de-
creases the supply of fuel to the engine giving a leaner fuel/
air mixture, Turning the idle mixture valve out (counter.
clockwise) increases the supply of fuel to the engine giving
a richer fuel/air mixture.
IMPORTANT" DAMAGE TO THE NEEDLE VALVE AND
THE SEAT tN CARBURETOR MAY RESULT tF SCREW tS
TURNED IN TOO TIGHTo
PRELIMINARY SETTING -
• Air cleaner assembly must be assembled to the carbu-
retor when making carburetor adjustments,
• Be sure the throttle control cable is adjusted properly
(see above).
• With engine off turn idle mixture valve In (clockwise)
closing it finger tight and then turn out (counterclock-
wise) 1 full turn.
THROTTLE IDLE SPEED
LEVER SCREW
IDLE MIXTURE
VALVE
FIG. 30
23