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AND ADJUSTMENT
12o Throttle Control Cable Adjustment
Never attempt to change maximum engine speed This is
preset at the factory and should only be changed by a
qualified service technician who has the necessary
equipment CAUTION: BEFORE ANY ENGINE ADJUST-
MENT, MAKE SUREAIR CLEANER IS CLEAN. RemoveAir
Cleaner Assembly, while making adjustments_
a With engine off, place Throttle Control in "FAST"
position,
b Loosen Clamp Screw (Fig 19) Adjust Throttle
Cable until holes "A "ate aligned in govemor control
plate and slide plate
c Tighten clamp screw
d If holes do not align, repeat steps in throttle cable
adjustment
13. Carburetor Adjustment
NOTE: ADJUST THROTTLE CONTROL CABLE BEFORE
MAKING ANY ADJUSTMENT TO CARBURETOR
a With engine off turn high speed mixture screw clock-
wise ( _ ) closing finger tight ONLY, and turn
counterclockwise ( _-_'_) 1-1/2 turns (Fig 19)
NO TE_ THE SCREW SEA TMA Y BE DAMAGED B Y TURN-
ING IT TOO FAR CLOCKWISE
b Turn idle mixture screw clockwise (f'_) closing
finger tight only, and turn counterclockwise (._'.)
1-V2 turns (Fig 19).
_ REFER TO "STARTING THE ENGINE"
PAGE 10o
iDLE
STOP
DO NOT
ADJUST
IDLE
MIXTURE
ADJUSTMENT
IDLE
MIXTURE
SCREW
THROTTLE
IDLESPEED
SCREW
HIGH SPEED
MIXTURE SCREW PLATE.
GOVERNOR
HOSE CONTROL
HOSE CLAMP
CLAMP
FUEL
FILTER
SLIDE
PLATE
FIGURE 19
Co Start engine and allow to warm for five minutes,
Make final adjustment with engine running and Gear
Shift lever in "NEUTRAL" positlon,
do With throttle control lever in "FAST" position, turn
high speed mixture screw counterclock wise (.'_'-_ )
until engine runs "rough"then turn clockwise (f-_)
until engine begins to miss° Turn screw to a point
midway between these positions.
e, With throttle control lever in "SLOW"position, hold
throttle lever so that idle stop screw is against carbu-
retor, turn idle mixture Screw counterclockwise ("_')
until engine runs "rough" and then turn clockwise
(F-_ ) until engine begins to die. Turn idle mixture
screw to a point midway between these positions.
f Withthrottlecontmlleverin"SLOW"position, engine
should idle at 1750 RPM. ff 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. ff engine Idles too fast with throttle control lever in
"SLOW" position push throttle control lever above
idle and turn idle speed screw one turn counterclock-
wise (,_-"_), Set throttle control lever at "SLOW",
Repeat until satisfactory idle is attained.
14. Replace Spark Plug
Replace spark plug at the beginning of each mowing seas-
on or every lOO hours, whichever comes first. Gap shou/d
be set at 0.030 inch (Fig. 20).
_, tm •
• _ ,/ .030 FEELER
'" /. *1_) 4 " GAUGE._..
FIGURE 20
18
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