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REPAIR AND ADJUSTMENT
;I
!
I
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IDLE
MIXTURE
SCREW
HIGH SPEED
MIXTURE
SCREW
FIGURE 20
FUEL
LINE
CLAMP
FUEL
FILTER
030 (0,762 mm)
FEELER GAUGE
SPARK PLUG
FIGURE 21
12 Throttle Control Cable Adjustment
| DO NOT MAKE UNNECESSARY AD
I A JUSTMENTS, FACTORY SETTINGS
| _ ARE SATISFACTORY FOR MOST AP
| _ PLICATIONS AND CONDITIONS IF AD
! JUSTMENTS ARE NEEDED, PROCEED
!. ..... ASFOLLOWS:.....
a. Make sure air cleaner is clean (see page 16).
bo With engine not running, place throttle control in
"FAST"position (not in "CHOKE" position)_
c. Checkthat holeinthrottleleverand hole inplateline
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. If holes do not align, repeat steps in throttlecable
adjustment°
13. Carburetor Adjustment
NOTE: ADJUSTTHROT__E CONTROL CABLE BEFORE
MAKING ANY ADJUSTM ENT TO CARBURETOR°
a. Withengineofftum higl_speed m_ure screwcl_,k-
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 CLOCKWfSEo
b Turn idle mixture screw clockwise closing finger
tight only, and turn counterclockwise1-1/2 turns.
REFER TO "STARTING THE ENGINE"
PAGE 11.
co Start engine and allow to warm for five minutes,
Make final adjustmentwithengine runningandgear
shill 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 throttlecontrol lever in "SLOW" position, turn
idle mixture screw counterclockwise until engine
runs "rough"and then turn clockwise untilengine
beginsto die, Turn idlemixture screwto apointmid-
way between these positions.
L W'dhthrottle control lever in "SLOW" positionen-
gine should idle at 1700 RPM, If engine idles too
slow, pushthrottlecontrollever above idle and turn
idle speed screw one turn clockwise. Set throttle
control lever at "SLOV'_. Repeat until satistactory
idle is attained
g If engine idles too fast with throttle control lever in
"SLOW" position push throttlecontrol lever above
idle and turn idle speed screw one turn counter-
clockwise. Set throttle control lever at "SLOW"°
Repeat untilsatisfactoryidle isattained.
h_, High speed stopis factory adjusted.. DO NOT AD-
JUST- DAMAGE MAY RESULT.
14. Replace Spark Plug
Replace sparkplugat the beginningof each mowingseason
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 adiustmenL it is suggested that a Sears
Service.Centerdo this work. Correct settings are: IntaKe-
,.002(_05 ram), Exhaust - _004 (_1mm)_
16. Replace In-Line Fuel Filter
BE SURE THERE ARE NO FUEL LINE LEAKS AND THAT
HOSE CLAMPS ARE PROPERLY INSTALLED.
If fuel filterisclogged, obstructingfuel flowtocarburetor,re-
placement is required.
a, With engine cool, remove fitter and plug fuel line
sections that were removed from both ends of fuel
filter (Fig,.20)._
18 b. Place new fuel filter in positionin fuel lineo