Acceleration Test - Craftsman 917.255930 Owner's Manual

SERVICE AN ADJUSTMENTS
H=_ ill illll illl IIH i I=H== = IHIH= H=I=HH=Hlll
TO ADJUST CARBURETOR (cont'd)
• With throttle control lever in "SLOW" position, hoId
throttle lever against idle speed screw and adjust idef
spped screw to obtain 1200 to t400 RPM
• While still holding throttle lever against idel speed
screw, turn idle mixture screw in (clockwise) until en-
gine begins to die and then turn out (counterclockwise)
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 RP M.
Release throttle lever
ACCELERATION TEST -
• Move throttle control tever 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 accel-
erates 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. OVERSPEED1NG THE ENGINE ABOVE
THE FACTORY HiGH SPEED SETTING CAN BE
DANGEROUS. IF YOU THINKTHE ENGINE-GOVERNED
HiGH SPEED NEEDS ADJUSTING, CONTACT YOUR
NEAREST SEARS SERVICE CENTER, WHICH HAS
PROPER EQUIPMENT AND EXPERI ENCE TO MAKE ANY
NECESSARY ADJUSTMENTS
FIG. 48
IDIP SPEED
_CREW
THRO3-rLE
LEVER
IDLE MIXTURE
SCREW
LEVER
IDLE MIXTURE
SCREW
FIG. 49
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