Craftsman 917.254611 - Manual (Page 18)

REPAIR AND ADJUSTMENT
SCREW CLAMP
FIGURE 20
12. Throttle Control Cable Adjustment
A
DO NOT MAKE UNNECESSARY AD­
JUSTMENTS.
FACTORY SETTINGS
ARE SATISFACTORY FOR MOST AP­
PLICATIONS AND CONDITIONS. IF AD­
JUSTMENTS ARE NEEDED, PROCEED
AS FOLLOWS:
a. Make sure air cleaner is clean (see page 16).
b. With engine not running, place Ihrottie control in
“FAST’position (not in ‘CHOKE" position).
c. Chedtthat holein throttle teverand hole in plate line
up {Fig. 20 “ Insert). If trales “A" are not aligned,
loosen clamp screw and move throttle cable until
holes are aligned. Tighten clamp screw.
d. If holes do not align, repeat steps in throttle cable
adjustment.
13. Carburetor Adjustment
NOTE: ADJUSTTHROTTLE CONTROL CABLE BEFORE
MAKING ANY ADJUSTMENT TO CARBURETOR.
a. With engine off turn high speed mixture screw cfock-
wise closing finger tight ONLY, and turn counter­
clockwise 1-1/2 turns.
NOTE: THE SCREW SEAT MAY BE DAMAGED BY
TURNING IT TOO FAR CLOCKWISE.
b. Turn idle mixture screw clockwise closing finger
light only, and turn counterclockwise 1-1/2 turns.
REFER TO “STARTING THE ENGINE'
PAGE 11.
c. Start engine and allow to warm for five minutes.
Make final adjustment with engine running and gear
shift lever in "NEUTRAL" position.
d. With throttle control lever in "FAST position, turn
high speed mixture screw clockwise until engine
runs "rough" and then turn counterclockwise 3/4
turn.
e With throttle control lever in "SLOW" position, hjm
idle mixture screw counterclockwise until engine
runs "rough" and then turn clockwise until engine
begins to die. Turn idle mixture saew to a point mid­
way between these positions.
f. With throttle control lever in "SLOW position en­
gine should idle at 1700 RPM. If engine idles too
slow, push throttle control lever above idle and turn
idle speed screw one turn clockwise. Set throttle
control lever at "SLOW. Repeat until satisfactory
idle is attained.
g If engine idles too fast with throttle control lever in
"SLOW position push throttle control lever above
idle and turn idle speed screw one turn counter­
clockwise. Set throttle control lever at "SLOW.
Repeat until satisfactory idle is attained.
h . High speed stop is factory adjusted . DO NOT AD­
JUST - DAMAGE MAY RESULT,
14. 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) .
15. 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 (.05 mm). Exhaust - 004 (.1 mm).
16. Replace In-Line Fuel Filter
BE SURE THERE ARE NO FUEL LINE LEAKS AND THAT
HOSE CLAMPS ARE PROPERLY INSTALLED.
If fuel filter is clogged, obstructing fuel flow to carburetor, re­
placement is required.
a With engine cool, remove filter and plug fuel line
sections that were removed from botn ends of fuel
filter (Fig. 20).
b. Place new fuel filter in position in fuel line.
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