Sears 917.257651 To Adjust Throttle Control Cable See Fig, To Adjust Carburetor See Fig

Page 23

SERVmCE AND ADJUSTMENTS

ENGINE

TO ADJUST THROTTLE CONTROL CABLE (See Fig. 31)

The throttle control has been preset at the factor*/ and adjustment should not be necessary. Checkadjustment as described below before loosening cabfe If adjustment is necessary, proceed as follows:

,With engine not running, move throttle control lever from slow (,.¢_.) to choke (\I) position Slowly move lever from choke (1\1) to fast (,re,) post on

oCheck to see if hole in throttle lever and hole in speed control bracket are aligned

°If holes are not aligned, loosen cable clamp screw and align the holes by inserting a pencil or a 1/4" drill bit through both holes

oPull throttle cable 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 fordifferences in fuel, temperature, altitude or load tf the carburetor does need adjustment, proceed as follows:

In 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 supply of fuel to the engine giving a richer fuel/air mixture

IMPORTANT: DAMAGE TO THE NEEDLES AND THE

SEATS 1N CARBURETOR MAY RESULT tF NEEDLE IS TURNED tN TOO TIGHT

PRELIMINARY SETTING -

•Be sure you have a dean air filter and the throttle control cable is adiusted properly (see above)

•With engine off turn idle fuel adjusting needle in (clock- wise) closing it finger tight and then turn out (counter- clockwise) I turn

FINAL SETTING -

oStart engine and allow to warm for five minutes. Make final adjustments with engine running and shift/motion control lever in neutral (N) position

•Idle speed setting - With throttle control lever in slow

(,_) position, engine should idle at 1750 RPM If

engine idles too slow or fast, turn idle speed adjusting screw in or out until correct idle is attained

•Idle f_el ne,_dle setting - With throttle control lever in slow i-_._) position, turn idle fuel adjusting needle in (clockwise) until engine begins to die and then turn out (counterclockwise) approximately 1/8 to 1/4 turn to obtain best low speed performance

o Recheck idle speed Readjust if necessary

ACCELERATION TEST-

oMove throttle control lever from slow (._) to fast (,_)

position If engine hesitates or dies, turn idle fuel

adjusting needle out (counterclockwise) 1/8 turn Re- peat test and continue to adjust, if necessary, until engine accelerates smoothly.

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

IMPORTANT: NEVER TAMPER WITH THE ENGINE

GOVERNOR, WHICH tS FACTORY SET FOR PROPER

ENGINE SPEED OVERSPEEDING THE ENGINE ABOVE

THE FACTORY HIGH SPEED SETTING CAN BE

DANGEROUS IFYOUTHINKTHEENGINE-GOVERNED

HIGH SPEED NEEDS ADJUSTING, CONTACT YOUR

NEAREST AUTHORIZED SERVICE CENTER/

DEPARTMENT, WHICH HAS PROPER EQUIPMENT AND

EXPERIENCE TO MAKE ANY NECESSARY ADJUSTMENTS

CABLE CLAMP SCREW_....._

SPEEDCONTROLBRACKET_

THROTTLE LEVER

FIG. 31

IDLE SPEED ADJUSTING SCREW

IDLE FUEL ADJUSTING NEEDLE

FIGo 32

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Contents Model Safe Operation Practices for Ride-On Mowers Safety RulesCustomer Responsibimties Maintenance AgreementLimited 90 DAY Warranty on Battery Contents Performance Aooessor Esand Attach EntsEngine Parts bag contents not shown full size Parts Bag contents shown full sizeBefore Rolling Tractor OFF Skid AssemblyTools REQU1RED for Assembly To Remove Tractor from CartonCheck for Proper Position of ALL Belts HOW to SET UP Your TractorPrepare Battery See Fig Install Seat See FigAssemble Gauge Wheels to Mower Deck See Fig Install Battery See FigsUUL VentcapsTo Convert to Bagging or Discharging INSTALL Mulcher Plate See Figs.7A & 7BKnow Your Tractor OperationSee Fig OperatnonTo SET Parking Brake See Fig Check Engine OIL Level See Fig Before Starting the EngineTo Operate Mower See Fig To Operate On HillsTo Start Engine See Fig Trash Clean After Each USEOiperatjon Mowing T PSBefore Each USE Fill in Dates Regular ServiceService Dates Custome Espon UtiesTires Custo Responswb L T ESTractor Brake OperationLubrication EngineAIR Filter See Fig Transaxle CoolingSpark Plugs CleaningClean AIR INTAKE/COOLING Areas MufflerTo Remove Mower See Fig To Install Mower See FigTo Level Mower Housing Servmce and AdjustmentsTo Replace Mower Blade Drive Belt See Fig Service AN AdjustmentsTo Adjust Brake See Fig Serwce and Adjustments Final Setting To Adjust Throttle Control Cable See FigTo Adjust Carburetor See Fig Preliminary SettingEngine OIL BatteryOther Fuel SystemCause Correction Trouibleshoot NG PointsPO NTS TroubleshootingSchematic

917.257651 specifications

The Sears 917.257651 is a riding lawn mower that has gained a reputation for its reliability and efficiency in lawn care. Designed as a versatile solution for both small and medium-sized yards, this mower combines power and ease of use, making it a popular choice among homeowners.

One of the standout features of the Sears 917.257651 is its robust engine. It typically comes equipped with a powerful 17.5 HP Briggs & Stratton engine, which provides ample torque and performance to tackle various mowing conditions. This engine is designed to be fuel-efficient, allowing homeowners to cover more ground without frequent refueling.

The mower utilizes a 42-inch cutting deck, which strikes an excellent balance between maneuverability and cutting width. This size is particularly advantageous for navigating around trees, flower beds, and other obstacles typically found in residential landscapes. The cutting deck also features multiple height adjustments, enabling users to customize their mowing height to achieve the desired lawn appearance.

Ergonomics play a crucial role in the design of the Sears 917.257651. The operator's seat is designed for comfort, featuring ample padding and adjustable settings to accommodate various user preferences. Additionally, the model incorporates a user-friendly steering wheel that enhances maneuverability, making it easy to navigate tight corners.

The mower is equipped with a hydrostatic transmission, which allows for smooth speed adjustments without the need for manual shifting. This feature provides intuitive control, enabling the operator to focus on mowing without worrying about gear changes.

The Sears 917.257651 also includes a range of safety features, such as a seat switch that ensures the mower will not operate if the driver leaves the seat. This helps prevent accidents and enhances overall safety during operation.

With its combination of powerful performance, ergonomic design, and user-friendly features, the Sears 917.257651 stands out as a reliable choice for homeowners seeking to maintain their lawns efficiently. Whether tackling overgrown grass or performing regular lawn maintenance, this riding mower offers the strength and flexibility necessary to get the job done right. Its enduring popularity in the market is a testament to its build quality, technological innovation, and user-centered design.
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