TO ADJUST THRO_LE CONTROL CABLE (See Fig, 31)

The throttie control has been preset at the factohi and adjustment should Rot be necessaPy. Check adiustment as described below before !oosening cab{e_ If adjustment is necessary, proceed as fotfows:

oWith engine not running, move throttte contre/_ever from slow (_) to choke (/',.)position Siowly move lever from choke (/'_to.i) fast (@) position.

o Check that holes "A°'in governor control _everand hole

GOVERNOR

GOVERNOR

CONTROL LEVER

CONTROLPLATE

FINAL S£'TTtNG --

oSta_l engne and anew to warm for five minutes Make fina_ adjustments with engine running and sh ftimotion control lever in neutraI (N) pos tion

Move throttle control _ever to stow (_) position. With

oWMle still holding throttle lever against idle speed

screw, turn idle mixture vatve in (clockwise) until en gee begns to die and then turn out (countercbckwise)

unt_ engne runs rough. Turn vaive to a point midway between those two positions. Retease throttie iever_

ACCELERATION TEST _-

oMove thrott e contrnl Iever from skwv (_) to fast (@) position_ If engine hesitates or dies, turn idle m xture

valveout(counterdockwse) t!8tum Repeat test and cont Rue to adiust if necessary_ until engine acceIeb

High speed stop is factory adiusted Do not adiust damage may resutt

_MPORTANT: NEVER TAMPER WITH THE ENGINE GOVERNOR, WHICH S FACTORY SET FOR PROPER ENGINE SPEED OVERSPEED/NGTHEENG_NEABOVE

"THE FACTORY HiGH SPEED SETT!NG CAN BE

DANGEROUS, IF YOU TH_NK THE ENGINE GOVERNED

H_GH SPEED NEEDS ADJUSTING, CONTACT YOUR

NEAREST AUTHORIZED SERV!CE CENTER/ DEPARTMENT, WHiC _,,HAS PROPER EQUIPMENT AND

EXPERIENCE TO MAKE ANY NECESSARY ADJUSTMEN'TS

F}G. 31

TO ADJUST CARBURETOR (See Fig, 32)

The carburetor has been preset at the factory and adiusb meet shouid ROt be necessary, However, minor adiust ment may be required to compensate for differences in fuel temperature, altitude or iead ff the carburetor does need adjustment, proceed as fo{fows:

In general, turning idle mixture valve in (clockwise) de_ creases the supply of fuet to the engine giving a fearer fueti air mixture, Turning the idle mixture valve out (counter clockwise) increases the supply of fuel to the engine giving a dcher fuel/air mixture,

fMPORTANT,, DAMAGE 'TOTHE NEEDLE VALVE AND THE SEAT IN CARBURETOR MAY RESULT IF SCREW/S TURNED _NTOO TIGHT

PREUMINARY SETTING ..

Air clearer assembly must be assembled to the carbu-- retor when making carburetor adjustments

oBe sure the throttle control cable is adiusted propedy (see above)

,With engine off turn idie mixture valve in (clockwise) ctosing it finger tight and then turn out (counterclock- wise) 1 fuli turn.

tDLE MIXTURE VALVE

FiG. 32

23

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Image 23
Sears 917.25759 manual To Adjust Throle Control Cable See Fig, To Adjust Carburetor See Fig, Acceleration Test

917.25759 specifications

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