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SERVUCE AN

ENGINE

TO ADJUST THROTTLE CONTROL CABLE (See Fig. 31)

The throttle control has been preset at the factory and adjustment should notbe necessary_ Checkadjustmentas described below before loosening cable_ If adjustment is necessary, proceed as follows:

.

With

engine not running, move throttle control lever

 

from

slow to choke position. Slowly move lever from

 

choke

to fast posit{on

.

Check

to see if hole in throttle {ever and hole in speed

 

control

bracket are aligned°

if ho{es are not aligned, {oosen cabte clamp screw and align the holes by inserting a pencil or a 1/4" ddll bit through both holes.

Putl throttle cab{e up to remove slack and tighten cable clamp screw.. Remove alignment pencil or drill bit.

TO ADJUST CARBURETOR (See Fig, 32)

The carburetor has been preset at the factory and adjust- ment should not be necessary_ However, minor adjust-

ment may be required to compensate for differences in fuel, temperature, altitude or load. If the carburetor does need

adjustment, proceed as follows:

tn general, turning the adjusting needles in (clockwise) decreases the supply of fuel to the engine giving a leaner fuel/air mixture° Turning the adjusting needles out (counter-

clockwise) increases the suppty of fuel to the engine giving a richer fuel/air mixture

IMPORTANT: DAMAGE TO THE NEEDLES AND THE

SEATS iN CARBURETOR MAY RESULT IF NEEDLE iS

TURNED IN TOO TIGHT.

NOTE: The carburetor on this engine is low emission it is equipped with an idle fuel adjusting needle with a [imiter cap, which altows some adjustment within the timits allowed by the cap. Do not attempt to remove the limiter cap. The limiter cap cannot be removed without breaking the adjusting needle

oBe sure you have a clean air filter and the throttle control cable is adjusted properly (see above).

Start engine and allow to warm for five minute& Make

adjustments with engine running and shift/motion control lever in neutral (N) position.

.

ldle speed setting - With throttle control lever in slow

 

position, engine should idle at 1750 RPMo If engine

 

idles too slow or fast, turn idle speed adjusting screw in

 

or out until correct idle is attained.

.

Idle fuel needle setting - With

throttle control lever in

 

slow position, turn idle fuel adjustment needle in (clock-

 

wise) until engine begins to die and then turn out

 

(counterclockwise) until engine runs rough.. Turn needle

 

to a point midway between those two positions.

o

Recheck idle speed. Readjust

if necessary.

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ADJUSTMENTS

ACCELERATION TEST -

=Move throttle controlleverfrom slow to fast position, If engine hesitates or dies, turn idle fuel adjusting needle

out (counterclockwise) 1/8 turn. Repeat test and continue to adjust, if necessary, until engine acceler- ates smoothly..

High speed stop is factory adjusted Do not adjust - damage may result.

IMPORTANT: NEVER TAMPER WLTH THE ENGINE

GOVERNOR, WHICH IS FACTORY SET FOR PROPER ENGINE SPEED. OVERSPEEDING THE ENGINE ABOVE

THE FACTORY HIGH SPEED SETTING CAN BE

DANGEROUS IF YOU THINK THE ENGtNE-GOVERNED

HIGH SPEED NEEDS ADJUSTING, CONTACT YOUR

NEAREST AUTHORIZED SERVICE CENTER/

DEPARTMENT, WHICH HAS PROPER EQUIPMENT AND

EXPERIENCE TO MAKE ANY NECESSARY ADJUSTMENTS.

CLAMP

CABLE',,,_,,,_

SC R EW _..,,_

SPEED CONTROL"-_

BRACKET_-_._...

THROTTLE

LEVER

FIG. 31

IDLE SPEED

ADJUSTING

IDLE FUEL /

ADJUSTING

NEEDLE

FIG. 32

27

Page 27
Image 27
Craftsman 917.259592 To Adjust Throttle Control Cable See Fig, To Adjust Carburetor See Fig, Turned in TOO Tight