°The recommended tightening torque is 35-40 ft. Ibs..

IMPORTANT:

Blade bolt is grade 8

heat treated..

 

NOTE: We do not recommend sharp-

ening blade- butifyoudo, be sure the blade is balanced.

TO SHARPEN BLADE

Care should be taken to keep the blade balanced. An unbalanced blade will cause eventual damage to lawn mower or engine.

o The blade can be sharpened with a file or on a grinding wheel. Do not attempt

to sharpen while on the mower.

o To check blade balance, drive a nail into a beam or wall. Leave about one inch of the straight nail exposed. Place center hole of blade over the head of the nail

If blade is balanced, it should remain in a horizontal position. If either end of the blade moves downward, sharpen the heavy end until the blade is balanced.

BladeCrankshaft keyway

Key

Blade

Crank- shaft

bolt

LockTrai Blade

washer' edge adapter Hardened

washer

GRASS CATCHER

(If purchased as an accesssory)

o The grass catcher may be hosed with water, but must be dry when used,

=Check your grass catcher often for damage or deterioration. Through normal use it will wear. If catcher needs replacing, replace only with a manufac- turer approved replacement catcher. Give the lawn mower model number

when ordering.

ENGINE LUBRICATION

Use only high quality detergent oil rated with API service classification SF, SG or SH.

Select the oil'sSAE viscosity grade according to your expected operating temperature.

SAE VIScosrPI" GRADES

NOTE: Although multi-viscosity oils (5W30, 10W30 etc.) improve starting in cold weather, these multi-viscosity oils will result in increased oil consumption when used above 32°F. Check your engine oil level more frequently to avoid possible engine damage from running lowon oil.

Change the oil after every 25 hours of operation or at least once a year if the lawn mower is not used for 25 hours in one year. Check the crankcase oil level before starting the engine and after each five (5) hours of continuous use. Tighten oil plug securely each time you check the oil level

TO CHANGE ENGINE OIL

oDisconnect spark plug wire from spark plug

and place wire where it cannot come in contact with spark plug..

o Be sure lawn mower is on level surface.

oOil will drain more freely when warm. = Catch oil in a suitable container

=Remove bottom oil drain plug.

• After oil has drained completely, replace oil drain plug and tighten securely.

o Refill engine with oil. Pourslowiy. Do not over fill.

•FlUto top of slot inside of filler hole

•Reconnect spark plug wire to spark plug.

Drain plug

AIR FILTER

Your engine will not run properly and may be damaged by using a dirty air filter. Clean the element after every 25 hours of operation, more often if mower is used in very dusty, dirty conditions.

TO CLEAN AIR FILTER ELEMENT

oRemove the air filter by tuming counter- clockwise to the stop and pull away from collar.

10

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Craftsman 917.38721 owner manual Grass Catcher, AIR Filter
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917.38721 specifications

The Craftsman 917.38721 is a versatile and reliable lawn tractor designed for homeowners seeking to maintain their lawns with ease and efficiency. This model is a part of Craftsman's renowned lineup of outdoor power equipment, celebrated for their durability and performance. One of the most prominent features of the Craftsman 917.38721 is its powerful engine. It is equipped with a robust single-cylinder engine, providing ample power to tackle various mowing tasks. The engine is designed for smooth operation and longevity, ensuring that it can withstand regular use while delivering consistent performance.

Another key characteristic of the Craftsman 917.38721 is its cutting deck. With a generous cutting width, this lawn tractor can cover a wide area in a single pass, reducing mowing time and increasing efficiency. The cutting deck is adjustable, allowing users to choose from various height settings for a customized mowing experience. This feature allows homeowners to achieve the perfect cut for their lawn, whether it requires a close trim or a higher, more forgiving setting.

In terms of maneuverability, the Craftsman 917.38721 is designed with a tight turning radius, which facilitates easy navigation around obstacles like trees, flower beds, and garden ornaments. This aspect enhances the overall user experience, making it easier for operators to mow their lawns without missing spots or leaving untrimmed areas.

The Craftsman 917.38721 also incorporates advanced technologies that enhance its performance and ease of use. The model features a reliable automatic transmission system, allowing for smooth gear changes without manual intervention. This transmission enables users to maintain a steady pace, ensuring that mowing is not only easier but also more enjoyable.

Comfort is another priority in the design of the Craftsman 917.38721. The ergonomic seating and controls are designed to provide a comfortable riding experience, even during extended periods of use. The easy-to-access controls allow users to adjust settings quickly without fumbling, making the mowing process more efficient.

Additionally, the Craftsman 917.38721 is built with long-lasting materials and components, ensuring that it can withstand the rigors of yard work. Whether used for weekly mowing or larger landscaping projects, this lawn tractor is engineered to meet the demands of homeowners looking for a reliable and effective solution for maintaining their outdoor spaces. In summary, the Craftsman 917.38721 represents a blend of power, versatility, and user-friendly features, making it an excellent choice for lawn care enthusiasts.
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