REPAIR AND ADJUSTMENT c. Check that holein 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. If holes do not align, repeat steps in throttle cable adjustment°
13. Carburetor Adjustment
NOTE: ADJUSTTHROT__E CONTROL CABLE BEFORE
MAKING ANY ADJUSTM ENT TO CARBURETOR°
a. With engine offtum higl_speed m_ure screwcl_,k- wise closing finger tight ONLY, and turn counter- clockwise
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
;I
!
I
;!
IDLE MIXTURE
SCREW
FUEL
HIGH SPEEDFUEL FILTER
MIXTURELINE
SCREWCLAMP
FIGURE 20
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)_
REFER TO "STARTING THE ENGINE"
PAGE 11.
co Start engine and allow to warm for five minutes,
Make final adjustmentwith engine runningand gear 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 throttle control lever in "SLOW" position, turn idle mixture screw counterclockwise until engine runs "rough" and then turn clockwise until engine beginsto die, Turn idlemixture screwto a point mid- way between these positions.
LW'dhthrottle control lever in "SLOW" position en- gine should idle at 1700 RPM, If engine idles too slow, push throttle controllever above idle and turn idle speed screw one turn clockwise. Set throttle
control lever at "SLOV'_. Repeat until satistactory idle is attained
gIf 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 adiustmenL it is suggested that a Sears
Service.Centerdo this work. Correct settings are:
16. Replace
BE SURE THERE ARE NO FUEL LINE LEAKS AND THAT HOSE CLAMPS ARE PROPERLY INSTALLED.
If fuel filteris clogged, obstructingfuel flow to carburetor, 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 position in fuel lineo
