WARM WEATHER STARTING (50°F/10°C and above)

7.When engine starts, slowly push choke control in until the engine begins to run smoothly. If the engine starts to run

roughly, pull the choke control out slightly for a few seconds and then continue to

push the control in slowly.

8.The attachments and ground drive can now be used. Ifthe engine does not accept the load, restart the engine and allow it to

warm up for one minute using the choke as described above.

COLD WEATHER STARTING (50°F/10°C and below)

9.When engine starts, slowly push choke control in until the engine begins to run smoothly. Continue to push the choke control in small steps allowing the engine to accept small changes in speed and load, until the choke control is fully in. If the engine starts to run roughly, pull the choke control out slightly for a few seconds and then continue to push the control in slowly. This may require an

engine warm-up period from several seconds to several minutes, depending on the temperature.

AUTOMATIC TRANSMISSION WARM UP

Before driving the unit in cold weather, the

transmission should be warmed up as fol- lows:

1.Be sure the tractor is on level ground.

2.Release the parking brake and let the brake slowly return to operating position.

3.Allow one minute for transmission to warm up. This can be done during the engine warm up period.

4.The attachments can be used during the engine warm-up period after the transmis- sion has been warmed up and may require

the choke control be pulled out slightly. NOTE: If at a high altitude (above 3000

feet) or in cold temperatures (below 32°F) the carburetor fuel mixture may need to be

adjusted for best engine performance (see

"TO ADd UST CARBURETOR" in the Service

and Adjustments section of this manual).

PURGE TRANSMISSION

_I_I,CAUTION: Never engage or disengage freewheel lever while the engine is running.

To ensure proper operation and performance,

it is recommended that the transmission be purged before operating tractor for the first time. This procedure will remove any trapped

air inside the transmission which may have developed during shipping of your tractor.

IMPORTANT: Should your transmission require removal for service or replacement, it should be purged after reinstallation before operating the tractor.

1.Place tractor safely on a level surface - that is clear of objects and open - with engine off and parking brake set.

2.Disengage transmission by placing freewheel control in disengaged position (See "TO TRANSPORT" in this section of manual).

3.Sitting in the tractor seat, start engine. After the engine is running, move throttle control to slow position. Disengage park- ing brake.

_CAUTION: At any time, during step 4, there may be movement of the drive wheels.

4.Depress forward drive pedal to full for- ward position and hold forfive (5) seconds and release pedal. Depress reverse drive pedal to full reverse position and hold for five (5) seconds and release pedal. Repeat this procedure three (3) times.

5.Shutoff engine and set parking brake.

6.Engage transmission by placing free-

wheel control in engaged position (See

"TO TRANSPORT" in this section of manual).

7.Sitting in the tractor seat, start engine. After the engine is running, move throttle control to half (1/2) speed. Disengage parking brake.

8.Drive tractor forward for approximately five feet then backwards for five feet.

Repeat this driving procedure three times.

Your transmission is now purged and now ready for normal operation.

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Craftsman 917.28991 manual Purge Transmission, Automatic Transmission Warm UP
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917.28991, 28991 specifications

The Craftsman 28991, also referred to by its model number 917.28991, is a robust lawn mower designed for efficiency and convenience in residential landscaping. This particular model is tailored to meet the diverse needs of homeowners who seek a reliable solution for lawn care.

One of the foremost features of the Craftsman 28991 is its powerful engine. Equipped with a high-performance, gasoline-powered engine, it delivers ample power to tackle various types of grass and terrain. The engine’s design emphasizes reliability, ensuring that users can depend on it without frequent maintenance issues.

The mower includes a versatile cutting deck that is adjustable, offering multiple height settings. This adjustment capability allows users to customize the cutting height to suit their lawn type and personal preferences. Whether you prefer a low trim for a manicured look or a higher cut for a more natural appearance, this mower accommodates those needs effortlessly.

With a focus on user comfort, the Craftsman 28991 features an ergonomic handle. The handle's design is meant to reduce fatigue during extended mowing sessions, allowing for a more pleasant mowing experience. The mower also incorporates a self-propelling mechanism, which makes it easier to maneuver across varying terrains, especially on slopes or uneven ground.

In terms of technology, the Craftsman 28991 offers a bagging option alongside mulching capabilities. The rear bag collects grass clippings, reducing the need for additional yard cleanup, while the mulching feature finely chops the clippings, returning vital nutrients back to the lawn. This dual-functionality promotes a healthier lawn while simplifying the mowing process.

The construction of the Craftsman 28991 highlights durability. Its steel deck is designed to withstand the rigors of frequent use, ensuring longevity while maintaining performance. Additionally, the design includes oversized wheels that enhance traction and maneuverability, making it suitable for navigating tight spaces and obstacles.

Overall, the Craftsman 28991,917.28991 is an exceptional choice for homeowners looking for a dependable, feature-rich mower. With its powerful engine, adjustable cutting deck, ergonomic design, and dual-functioning capabilities, it stands out as a reliable tool for achieving a well-maintained lawn with minimal effort.
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