Craftsman 917.254640 Owner's Manual page 18

FtEPAIFtAND ADJUSTMENT
THROTTLE
LEVER
I
•HOLES "A"
/
MIXTURE
SCREW
•,-...- FUEL
LINE
CLAMP
FUEL
FILTER
FIGURE 20
.030"FEELER
GAUGE
SPARK
FIGURE 21
I ^ sE SUrETHERE ARENOFUEL UNEU
LEAKS AND THAT HOSE CLAMPS ARE J
PROPERLY INSTALLED
12. Throttle Control Cable Adjustment
DO NOT MAKE UNNECESSARY ADJUSTMENTS. FAC-
TORY SETTINGS ARE SATISFACTORY FOR MOST AP-
PLICATIONS AND CONDITIONS. IF ADJUSTMENTS
ARE NEEDED, PROCEED AS FOLLOWS.
a.
b.
Make sure air cleaner is clean (see page 16).
With engine not running, place throttle con-
trol in "'FAST" detent (not in "CHOKE"
position). 18
c. Check that hole in throttle lever and hole in
plate line up (Fig, 20 - Insert). If holes "A"
are not aligned, loosen clamp screw and move
throttle cable until holes are aligned. Tighten
clamp screw.
d. tf holes do not align, repeat steps in throttle
cable adjustment.
1 3. Carburetor adjustment
NOTE : ADJUST THROTTLE CONTROL
CABLE BEFORE MAKING ANY AD-
JUSTMENT TO CARBURETOR.
a. With engine not running, turn mixture screw
clockwise (F',_J LIGHTLY to seat. CAUTION:
FORCING WILL CAUSE DAMAGE. Turn mix-
ture screw counterclockwise (/F_ ) one turn.
b. Start engine and allow to idle for five minutes.
I REFER" TO "STARTING THE ENGINE'" j
PAGE 10.
J ............ ......
c . Turn mixture screw clockwise (F_) until the
engine speed drops. NOTE THE SCREW
POSITION.
d. Turn mixture screw counterclockwise (F'_)
until the engine begins to run rough. Set mix-
ture screw between the two positions.
e. Push throttle lever to "'FAST" detent (not
"CHOKE"). If engine runs rough make small
adjustments on mixture screw until engine
runs smoothly.
f . tf engine idles too fast or too slow, adjust idle
with idle speed stop screw.
g. High speed stop is factory adjusted. DO NOT
ADJUST- DAMAGE MAY RESULT.
1 4. Replace Spark Plug
Replace spark plug at the beginning of each mowing
season or every 100 hours, whichever comes first. Gap
should be set a 0.030 inch (Fig. 21).
1 5. Adjust Valves on Engine
After approximately 200 hours of operation, the engine
valves will require adjustment, It is suggested that a
Sears Service Center do this work. Correct settings are:
Intake -. 002, Exhaust -. 004.
16. Replace In-Line Fuel Filter
ff fuel filter is clogged, obstructing fuel flow to car-
buretor, replacement is required.
a, With engine cool, remove filter and plug fuel line
sections which were removed from both ends of fuel filter
(Fig. 20).
b. Place new fuel filter in position in fuel line.