FUEL SYSTEM

CARBURETOR ADJUSTMENTS -Continued

ACAUTION! Be sure the brake pedal is in the locked position, transmission is in

neutral, and the mower is disenga~d before adjusting the carburetor.

Adjusting the High-SpeedAdjustment Screw

Turn the high speed adjustment screw counter- clockwise approximately two turns from the closed position and start the engine.

Be sure the choke is fully open when adjusting.

After the engine has reached normal operating temperature, place the throttle lever in the fast position and turn the high speed adjustment screw clockwise to the leanest mixture that will allow sat i sf actory acceleration and steady governor operation. Then, turn counterclockwise to the richest mixture that allows satisfactory operation.

The difference between the rich and lean points is about 1/2 turn. Set the mixture to the rich end of this range.

If the engine misses and backfires under load, the high speed mixture is too lean. The high speed adjustment screw must be turned counter-clock- wise 1/4 turn at a time until the condition is corrected.

If the engine shows a sooty exhaust and is sluggish under load, the high speed mixture is too rich. The high speed adjustment screw must be turned clockwise 1/4 turn at a time until the condition is

corrected.

Adjusting the Idle Adjustment Screw

After the high speed adjustment screw is adjusted, it may be necessaryto readjust the idle adjustment screw as each affects the other.

Close the idle adjustment screw to its seat by turning it clockwise; then open it one turn. Start the engine and operate it at fast idling speed (without any load) until thoroughly warm.

While the engine is running at fast idle speed, it is advisable to screw in the throttle stop screw a few turns to keep the engine from stopping when the throttle lever is moved to the fully retarded "SLOW" position. The engine will then be idling at a fairly high speed and the throttle stop screw can be backed out a little at a time until the desired idle speed is obtained.

If the engine misses or rolls while backing out the throttle stop screw, the idle adjustment screw may be adjusted in or out until the engine operates smoothly. Speed up the engine for a few seconds; then recheck the idle adjustment. A slight adjust- ment in or out will give the smoothest idle.

PREPARING THE TRACTOR FOR EACH DAY'S WORK

Check the crankcase oil level and add new oil if necessary. See pages 34 and 35.

Clean the air cleaner element if necessary. See page 21.

Inspect the tires for general condition. See page 26

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Cub Cadet 128, 86, 129, 169, 149, 108 manual Adjusting the High-SpeedAdjustment Screw
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108, 149, 169, 129, 128 specifications

The Cub Cadet series of tractors, particularly models 129, 86, 169, 149, and 128, represents a significant chapter in the history of garden and lawn care machinery. Known for their durability and innovative features, these tractors offer a blend of power and functionality that appeals to both homeowners and agricultural enthusiasts.

One of the main attractions of these models is their robust construction. Built with a heavy-duty frame, they are designed to withstand the rigors of outdoor tasks such as mowing, tilling, and hauling. The engines are typically Kohler or Tecumseh, providing reliable performance and ample power for various attachments. This capability allows these tractors to excel in tasks, from simple grass cutting to challenging snow removal.

The Cub Cadet 129, for example, offers a 12-horsepower engine, making it suitable for many residential landscaping needs. Its hydrostatic transmission provides smooth operation, allowing for easy speed adjustments without having to shift gears manually, making it user-friendly. Likewise, the 149 model features a similar engine, with the added benefit of a wider cutting deck, improving efficiency for larger lawns.

The Cub Cadet 86 stands out with its unique design and powerful 8 horsepower engine. It also features easy access controls, allowing operators to efficiently switch between various attachments, enhancing overall productivity. This fluidity is mirrored in the 169 model, which integrates advanced steering mechanisms that provide greater maneuverability, allowing users to navigate tight spaces with ease.

Model 128 offers a blend of modern technology and classic charm. It is equipped with a comfortable seat for extended usage and ergonomic controls, responding to the needs of users who spend considerable time on their tractors. The combination of comfort and performance makes these tractors popular among gardening aficionados.

Overall, the Cub Cadet series boasts a legacy of reliability, with a focus on ergonomic design and user-friendly technology. Whether for professional landscaping or personal gardening, these models, with their powerful engines and robust capabilities, continue to be a preferred choice for those looking to enhance their outdoor experience.
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