Throttle Control Cable - Craftsman 917.258532 Owner's Manual

TO ADJUST CARBURETOR (See Fig. 34)
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 follows:
In general, turning idle mixture valve in (clockwise) de-
creases the supply of fuel to the engine giving a teaner 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 IN CARBURETOR MAY RESULT IF SCREW tS
TURNED IN TOO TIGHT°
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.
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°
o Move th rottte control lever'to slow position_ With finger,
rotate and hold throttle lever against idlespeed screw.
Turn idle speed screw to attafn 1750 RPM
• While still holding throttle lever against idte speed
screw, turn idle mixture valve in (clockwise) until en-
gine beginsto die and then turn out (counterclockwise)
until engine runs rough Turn valve to a point midway
between those two positions. Release throttle lever'.
ACCELERATION TEST -
• Move throttle control lever from stow to fast position., if
engine hesitates or dies, turn idle mixture valve 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 resulL
IMPORTANT: NEVER TAMPER WITH THE ENGINE
GOVERNOR, WHICH IS FACTORY SET FOR PROPER
ENGINESPEED. OVERSPEEDtNGTHE ENGINE ABOVE
THE FACTORY HIGH SPEED SETTING CAN BE
DANGEROUS. _FYOU 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.
I
THROTTLE IDLE SPEED
LEVER SCREW
IDLE MIXTURE
VALVE
FIG. 34
26