Sears 917.25559 i TO ADJUST THROTTLE CONTROL CABLE See Fig, TO ADJUST CARBURETOR See Fig, Engine

SERVICE AN ADJUSTMENTS

ENGINE

..... i TO ADJUST THROTTLE CONTROL CABLE

(See Fig. 33)

The throttle control has been preset at the factory and adjustment should not be necessary, Check adjustment as described below before loosening cable, tf 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" position.

oCheck that holes "A" in governor control lever and hole in governor plate line-up, If holes "A" are not aligned, Ioosen clamp screwand move throttle cable until holes are aligned. Tighten clamp screw securely,

GOVERNOR	GOVERNOR
CONTROL LEVER
	CONTROL PLATE

HOLES "A"	CLAMP	THROTTLE
	SCREW
		CABLE

FINAL SETTING -

•Start engine and allow to warm for five minutes. Make finat adjustments with engine running and shift/motion contro! lever in "NEUTRAL" position.

•Move throttle control lever to "SLOW" position. With

finger, rotate and hold throttle lever against idle speed screw. Turn idle speed screw to attain 1750 RPM.

•While still holding throttle lever against idle speed screw, turn idle mixture valve in (clockwise) until en- gine begins to die and then turn out (counterclockwise) until engine runs rough. Turn valve to a point midway between those two positions. Release throttle Jever.

ACCELERATION TEST -

"Move throttle control lever from "SLOW" to "FAST"

position. If engine hesitates or dies, turn idle mixture valve 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 WtTH THE ENGINE GOVERNOR, WHICH IS FACTORY SET FOR PROPER

ENGINE SPEED. OVERSPEEDtNG THE ENGINE ABOVE

THE FACTORY HIGH SPEED SETTING CAN BE

DANGEROUS. iF YOU THINK THE ENGINE-GOVERNED

HIGH SPEED NEEDS ADJUSTING, CONTACT YOUR NEAREST AUTHORIZED SERVICE CENTER, WHICH HAS PROPER EQUIPMENT AND EXPERIENCE TO MAKE ANY NECESSARY ADJUSTMENTS.

FIG, 33

THROTTLE	IDLE SPEED
LEVER	SCREW

TO ADJUST CARBURETOR (See Fig. 34)

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 idfe mixture valve in (clockwise) de- creases the supply of fuel to the engine giving a leaner fuel/ air mixture. Turning the idle mixture valve out (counter-

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

iMPORTANT: DAMAGE TO THE NEEDLE VALVE AND

TH E SEAT IN CARBURETOR MAY RESULT IF SCREW IS TURNED tN TOO TIGHT.

PRELIMINARY SETTING

•Air cleaner assembly must be assembled tothe carbu- retor when making carburetor adjustments.

,Be sure the throttle control cable is adjusted properly (see above).

•With engine off turn idle mixture valve in (clockwise) closing it finger tight and then turn out (counterclock- wise) I full turn.

IDLE MIXTURE

VALVE

FIG. 34

24