To Adjust Throttle Control Cable; Preliminary Setting; Final Setting; Acceleration Test - Craftsman 917.299881 Owner's Manual

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:
o With engine not running, move remote throttle control
lever to "FAST" position..
• Checkthat holes "A" in governor control lever and hole
in governor plate line-upo If holes "A" are not aligned,
-loosen ctamp screw and move-threttleeableuntil.-heles
are aligned. Tighten clamp screw securely.
THROTTLE
CABLE
',,.GOVERNOR
CONTROL PLATE
FIG. 29
GOVERNOR
CONTROL
LEVER
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 fordifferences infuel,
temperature, altitude or Ioado If the carburetor does need
adjustment, proceed as follows:
In general, turning valves in (clockwise) decreases the
supply of fuel to the engine giving a leaner fueVair mixture°
Turning the valve out (counterclockwise) increases the
supply of fuel to the engine giving a richer fueVair mixture_
IMPORTANT: DAMAGE TO THE VALVE AND THE SEAT
IN CARBURETOR MAY RESULT IF SCREW IS 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,
• Turn needle valve in (clockwise) closing itfinger tight
and then out (counterclockwise) 1-I/2 turns,
FINAL SETTING
.-. .... Start-engine-andallow-to-warmfor.fiveminuteso Make
final adjustments with engine running and drive control
bar in "NEUTRAL" position_
• Move remote throttle control lever to "FAST" position_
Turn needle valve in (clockwise) until engine begins to
die and then turn out (counterclockwise) until engine
runs rough, Turn valve to a point midway between
those two positions. Release throttle control levero
- Move remote throttle control lever to "SLOW" position,,
Rotate and hold throttle against idle speed screw. Turn
idle speed screw to attain 1850 RPM.
° While still holding throttle against idle speed screw,
turn idle mixture valve in (clockwise) until engine
begins to die and then turn out (counterclockwise) until
engine runs rough. Turn valve to a point midway
between those two positions_ Release throttle,.
ACCELERATION TEST
• Move remote throttle control lever from "SLOW" 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 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 EQUIPMENT AND
EXPERIENCE TO MAKE ANY NECESSARY
ADJUSTMENTS..
THROTTLE
IDLE MIXTURE
VALVE
IDLE
SPEED
SCREW
THROTTLE STOP
NEEDLE VALVE(HIGH SPEED)
FIG, 30
19