SERVICE AND ADJUSTMENTS

ENGINE

Maintenance, repair, or replacement of the emission con- trol devices and systems, which are being done at the customers expense, may be performed by any non-road engine repair establishment or individual. Warranty repairs must be performed by an authorized engine manufacturer's service outlet.

TO ADJUST THROTTLE CONTROL CABLE (See Fig. 32)

The throttle control has been preset at the factory and adjustment should not be necessary. Check adjustment as described below before loosening cable. If adjustment is necessary, proceed as follows:

•With engine not running, move throttle control lever from slow to choke position. Slowly move lever from choke to fast position.

•Check 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.

•Pull throttle cable up to remove slack and tighten cable clamp screw. Remove alignment pencil or drill bit.

TO ADJUST CARBURETOR (See Fig. 33)

The carburetor has been preset at the factory and adjustment should not be necessary.However, minor adjustment may be required to compensate for differences in fuel, temperature, altitude or load. If 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 (coun- terclockwise) increases the supply of fuel to the engine giving a richer fuel/air mixture.

IMPORTANT: DAMAGETOTHE NEEDLES ANDTHE SEATS IN CARBURETOR MAY RESULT IF NEEDLE IS TURNED IN TOO TIGHT.

NOTE: The carburetor on this engine is low emission. It is equipped with an idle fuel adjusting needle with a limiter cap, which allows some adjustment within the limits allowed by the cap. Do not attempt to remove the limiter cap. The limiter cap cannot be removed without breaking the adjusting needle.

•Be sure you have a clean air filter and the throttle control cable is adjusted properly (see above).

•Start engine and allow to warm for five minutes. Make 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 fuel needle setting - With throttle control lever

in slow position, turn idle fuel adjustment needle in (clockwise) until engine begins to die and then turn out (counterclockwise) until engine runs rough.Turn needle to a point midway between those two positions.

•Recheck idle speed. Readjust if necessary.

ACCELERATION TEST -

•Move throttle control lever from slow to fast position. If engine hesitates or dies, turn idle fuel adjusting needle out (counterclockwise) 1/8 turn. Repeat test and con- tinue to adjust, if necessary, until engine accelerates smoothly.

High speed stop is factory adjusted. Do not adjust - dam- age may result.

IMPORTANT: NEVER TAMPER WITH THE ENGINE GOVERNOR, WHICH IS FACTORY SET FOR PROPER ENGINE SPEED.OVERSPEEDINGTHE ENGINE ABOVETHE FACTORY HIGH SPEED SETTING CAN BE DANGEROUS. IF YOU THINK THE ENGINE-GOVERNED HIGH SPEED NEEDS ADJUSTING, CONTACTYOUR NEAREST AUTHORIZED SERVICE CENTER/ DEPARTMENT, WHICH HAS PROPER EQUIPMENT AND EXPERIENCE TO MAKE ANY NECESSARY ADJUSTMENTS.

CABLE

CLAMP

SCREW

SPEED CONTROL

BRACKET

THROTTLE

LEVER

FIG. 32

IDLE SPEED

ADJUSTING

SCREW

IDLE FUEL

ADJUSTING

NEEDLE

FIG. 33

25

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Poulan PD18H42STA owner manual To Adjust Throttle Control Cable See Fig, To Adjust Carburetor See Fig, Acceleration Test
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PD18H42STA specifications

The Poulan PD18H42STA is a powerful and versatile lawn tractor designed to make mowing easier and more efficient for homeowners and landscapers alike. With its robust build and a range of user-friendly features, the PD18H42STA is ideal for managing medium to large lawns.

One of the standout features of the Poulan PD18H42STA is its 18 horsepower Briggs & Stratton engine, known for efficiency and reliability. The engine provides ample power for cutting and handling various terrain types. Its overhead valve design enhances fuel efficiency and reduces emissions, aligning with modern environmental standards.

The PD18H42STA comes equipped with a 42-inch cutting deck, allowing for a wider cutting path, which means fewer passes over your lawn. The adjustable cutting height feature enables users to select from six different positions, ranging from 1.5 inches to 4 inches, accommodating different grass types and seasonal requirements. This flexibility ensures a clean and even cut, promoting healthy grass growth.

Another notable technology in this tractor is the hydrostatic transmission. This system allows for smooth acceleration and deceleration, providing easy maneuverability, especially in tight spaces. The absence of shifting gears simplifies operation, making it accessible even for those who may not be familiar with riding mowers.

Comfort is paramount in the design of the PD18H42STA. The seat is ergonomically designed with ample cushioning to provide comfort during extended use. The easy-to-use steering wheel allows for precise control, while the foot pedal allows for easy speed adjustments.

Maintenance is straightforward with the Poulan PD18H42STA. The deck wash feature makes it easy to clean the underside of the cutting deck, helping to prevent grass buildup and ensuring optimal performance. Additionally, a removable fuel tank cap facilitates refueling without spills, enhancing convenience.

In summary, the Poulan PD18H42STA combines power, comfort, and technology to deliver an excellent mowing experience. With its reliable engine, efficient cutting deck, and user-friendly features, it stands out as a capable choice for anyone looking to maintain a beautiful lawn with less effort.
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