$ERVRCE AND ADJUSTMENTS

i ,,,=

TO ADJUST CARBURETOR

(See Figs. 41 and 42)

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 Ioado If the carburetor does need adjustment, proceed as follows:

In general, turning the mixture screw in (clockwise) de- creases the supply of fuel to the engine giving a leaner fuel/ air mixture. Turning the mixture screw out (counterclock-

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

IMPORTANT: DAMAGE TO THE NEEDLES AND THE SEATS IN CARBURETOR MAY RESULT IF SCREW IS TURNED rN TOO TIGHT.

PRELIMINARY SETTING -

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

°With engine off turn idle mixture screw in (clockwise) closing it finger tight and then turn out (counterclock- wise) 1-1/4 to 1-1/2 turns.

FINAL SETTING -

°Start engine and allowto warm for five minutes. Make final adjustments with engine running and shift/motion control lever in "NEUTRAL" position.

oWith throttle control lever in "SLOW" position, hold throttle lever against idle speed screw and adjust idle speed screw to obtain 1200 to 1400 RPMo

oWhile still holding throttle lever against idle speed screw, turn idle mixture screw in (clockwise) until engine begins to die and then turn out (counterclock- wise) until engine runs rough. Turn screw to a point midway between those two positions.

oContinue to hold throttle lever against idle speed screw and adjust idle speed screwto obtain 900 to 1200 RPM Release throttle lever.

,ACCELERATION TES]: -

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

position, if engine hesitates or dies, turn idle mixture screw out (counterclockwise) 1/8 turn. Repeat test and continue to adjust, if necessary, until engine accel- erates smoothly..

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

IMPORTANT: NEVER TAMPER WITH THE ENGINE

GOVERNOR, WHICH IS FACTORY SET FOR PROPER

ENGINE SPEED. OVERSPEEDINGTHE ENGINE ABOVE

THE FACTORY HIGH SPEED SETTING CAN BE DANGEROUS,, IF YOU THINKTHE ENGINE-GOVERNED

HIGH SPEED NEEDS ADJUSTING, CONTACT YOUR

NEARESTAUTHORtZED SERVICE CENTER, WHICH HAS PROPER EQUIPMENT AND EXPERIENCE TO MAKE ANY NECESSARY ADJUSTMENTS..

IDLE SPEED

SCREW

IDLE MIXTURE

SCREW

THROTTLE

LEVER

FIG. 41

IDLE MIXTURE

LEVERSCREW

FIG. 42

2S

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Image 25
Sears 917.25597 owner manual To Adjust Carburetor, See Figs, Preliminary Setting, Final Setting, Acceleration TES
Page 24 Page 26

917.25597 specifications

The Sears 917.25597 is a versatile and efficient lawn mower model that stands out for its reliability and ease of use. Designed for homeowners looking for a robust solution to maintain their lawns, it incorporates a range of features that enhance its performance and user experience.

One of the key features of the Sears 917.25597 is its powerful engine. Equipped with a reliable gas-powered engine, this mower provides ample power to tackle various types of grass and terrain. The engine's design ensures smooth operation, leading to a longer lifespan and less maintenance compared to smaller, less durable engines. This robust power source translates into efficient cutting, allowing users to complete their lawn-mowing chores quickly and effectively.

The cutting deck of the Sears 917.25597 is another standout feature. With a wide cutting width, typically around 21 inches, it allows for broader mowing paths, reducing the time and effort you need to spend on your lawn. The deck is made from high-quality materials designed for durability. Additionally, the mower usually features adjustable cutting height settings, allowing users to customize grass length easily according to their preferences or seasonal needs.

Another technological advancement in the Sears 917.25597 is its self-propulsion system. This feature enables the mower to move forward with minimal effort from the user, making it ideal for larger properties. The self-propelled mechanism adjusts according to your walking speed, providing a comfortable mowing experience without requiring significant physical exertion.

User-friendly design is evident throughout the mower’s structure. The handle is adjustable, ensuring comfort for users of varying heights. The easy-start ignition system takes the hassle out of traditional pull-starts, allowing for a quick and reliable startup every time.

The Sears 917.25597 also considers storage and maintenance. Many models come with a foldable handle for easy storage in garages or sheds. Additionally, its components are designed for straightforward access, making routine maintenance tasks such as oil changes and air filter replacements uncomplicated.

In summary, the Sears 917.25597 is a well-rounded lawn mower that delivers reliable power, efficient cutting capabilities, and user-friendly features. Its blend of durability and performance makes it a suitable choice for homeowners looking to maintain an attractive lawn with minimal hassle.
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