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SERVICE AND ADJUSTMENT

CARBURETOR

NOTE: A dirty Air Cleaner will cause the Engine to run rough. Be sure Air Cleaner is clean before adjustments_ Factory settings are satisfactory for most applications

and conditions, if adjustments are needed, proceed as follows:

Never attempt to change maximum Engine speed. This is preset at the fa,ctory and should only be changed by a qualified service technician who has the necessary equipment. The Carburetor mixture may need re-adjust- ing it Engine lacks power'or does not idle properly,

MIXTURE ADJUSTMENT

. Turn Needle Valve (Fig. 33) clockwise (('_1)until it just

closes. Valve may be damaged by turning Needle Valve in too far,

•Open Needle Valve 1-1t2 turns counterclockwise (J¢'_), This initial adjustment will permit the Engine to be started and warmed up prior to final adjustment,

•Start the Engine,. Allow Engine to warm up for about 5 minutes before proceeding,,

. Place Throttle Control in "iDLE" position,

•Turn Needle Valve in until Engine slows (clockwise ((-_) lean mixture).,

THROTTLE THROTTLE

LINKAGE STOP

*Next turn Needle Valve out past smoothoperatingpoint until Engine runs unevenly (counterclockwise(F'_)rich mixture).

,Now turn Needle Valve to the midpoint between rich and lean so the Engine runs smoothly_

IDLE RPM ADJUSTMENT

•To adjust Idle RPM, Rotate Throttle Linkage counter- clockwise (V'_,)and hold against stop while adjusting Idle Speed Adjusting Screw to obtain 1750 RPM. Re- lease Throttle Linkage,,

CHECKING ADJUSTMENT

. Test the Engine by tilling,If Engine dies out, it usually indicates that the mixture is slightly lean and it may be necessary to turn the Needle Valve counterclockwise (_"_,) slightly to provide a richer mixture,. This richer mixture may cause a slight unevenness in idling..

THROTTLE CONTROL CABLE ADJUSTMENT

CAUTION; NEVER TAMPER WITH THE ENGINE GOV- ERNOR, WHICH IS FACTORY SET FOR PROPER ENGINE SPEED°

• Loosen Throttle Cable Adjusting Screw.

. With Throttle Control in "FAST" position and Cable con- nected to Bellcrank, pull Cable backward through Screw until Bellcrank is as far rearward as it will go.

, Tighten Adjusting Screw

MUFFLER

;PARK PLUG

 

WIRE

IDLE SPEED NEEDLE

ADJUSTING VALVE

SCREW

THROTTLE

CABLE

ADJUSTING

SCREW

9ELLCRANK

FIGURE 33

2O

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Sears 917.299642 owner manual Carburetor, Mixture Adjustment, Idle RPM Adjustment, Checking Adjustment
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917.299642 specifications

The Sears 917.299642 is a powerful and versatile lawn tractor that has garnered attention for its reliability and innovative features. Designed with homeowners and landscaping enthusiasts in mind, this machine excels in various outdoor applications, including mowing, mulching, and snow removal.

One of the standout features of the Sears 917.299642 is its robust engine. Typically equipped with a dependable Briggs & Stratton or Kohler engine, the tractor provides ample power to tackle even the toughest terrain. The engine is designed for optimal performance, featuring easy starting mechanisms and efficient fuel consumption, allowing users to work longer without frequent refueling breaks.

The cutting deck of the Sears 917.299642 is another highlight. With a wide cutting width, often around 42 to 54 inches depending on the model variant, it ensures efficient mowing of medium to large lawns. The deck is made with durable materials to resist wear and tear, while its adjustable height settings allow users to customize the mowing height according to their lawn's needs.

One of the notable technologies incorporated in the Sears 917.299642 is its hydrostatic transmission. This feature allows for smooth and effortless speed adjustments, providing a more intuitive driving experience. Operators can simply press the pedal to accelerate or decelerate, eliminating the need for manual shifting and making it easier to navigate around obstacles.

Furthermore, the Sears 917.299642 is designed with user comfort in mind. The ergonomic seat is padded and adjustable, ensuring that operators can find their ideal driving position. The tractor also features a reliable steering system, making it easy to maneuver, even in tighter spaces.

In terms of build quality, the Sears 917.299642 is constructed with a robust frame and heavy-duty components, ensuring longevity and durability. Whether used for regular mowing or more demanding tasks, this lawn tractor is built to last.

Maintenance ease is another characteristic that sets the Sears 917.299642 apart. With easily accessible components, including the engine and mower deck, routine servicing and repairs can be performed with minimal hassle. This feature greatly appeals to homeowners looking for low-maintenance outdoor equipment.

In summary, the Sears 917.299642 offers a combination of power, versatility, and user-friendly design, making it an excellent choice for homeowners seeking a reliable lawn tractor to maintain their outdoor spaces.
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