Craftsman 917.25552 manual Service, To Adjust Throttle Control Cable, To Adjust Carburetor See Fig

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ENGINE

TO ADJUST THROTTLE CONTROL CABLE

(See Fig. 32)

The throttle control has been preset at the factory and ad- _dustmentshould not be necessary Check adjustment as escribed 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

,Check that holes "A" in govet nor control lever and hole in governor plate line-up. If holes "A" are not aligned, loosen clamp screw and move throttle cable until holes are aligned. Tighten clamp screw securely.

GOVERNORGOVERNOR

CONTROL LEVER

CONTROL PLATE

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ADJUSTMENTS

FINAL SETTING -

•Start engine and allow to warm for five minutes. Make final adjustments with engine running and shift/motion control 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 lever..

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 WITH THE ENGINE

GOVERNOR, WHICH IS FACTORY SET FOR PROPER ENGINE SPEED, OVER- SPEEDING 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

HOLES "A"	CLAMP	THROTTLE
	SCREW	CABLE

FIG, 32

TO ADJUST CARBURETOR (See Fig. 33)

The carburetor has been preset at the factory and adjust- merit 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 Reed adjustment, proceed as follows:

In general, turnig idle 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: DAMAGETOTHENEEDLEVALVE AND THE SEAT tN CARBURETOR MAY RE_

SULT IF SCREW IS TURNED IN TOO TIGHT.

PRELIMINARY SETTING -

•Air cleaner assembly must be assembled to the 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) 1 full turn

24

THROTTLE LEVER

CENTER, WHICH HAS PROPER EQUIP- MENTAND EXPERIENCETO MAKEANY NECESSARY ADJUSTMENTS

IDLE SPEED

SCREW

IDLE MIXTURE

VALVE

FIG. 33