Section 7

C. Changing Engine Oil Filter

After the first 5 hours of operation, replace the engine oil filter. Thereafter, replace the oil filter after every 200 hours of operation or every month, whichever occurs first. Refer to Engine Operator’s Manual for instructions.

1.Close the shutoff valve. Remove the two clamps securing the fuel filter to the fuel hose. Remove the fuel filter.

2.Install a new fuel filter. Be sure it is installed in the proper direction. Secure to the fuel hose using the two clamps.

7.5 ENGINE FUEL SYSTEM

To avoid injury from burns, allow the mower to cool before removing the fuel tank cap and refueling.

FUEL

FILTER

HOSE

CLAMPS

STT99FF

Figure 7-7 Fuel Filter

7.6 ENGINE AIR CLEANER

A. Cleaning and/or Replacing Air Cleaner Element

For any air cleaner, the operating environment dictates the air cleaner service periods. Inspect and clean the air cleaner element after every 100 hours of operation or bi- weekly, whichever occurs first and replace the element if required.

-NOTE-

In extremely dusty conditions it may be necessary to check the element once or twice daily to prevent engine damage.

1.Remove the wing nut securing the air cleaner cover to the engine. Remove the air cleaner cover and set aside.

2.Remove the air cleaner and inspect.

3.Clean or replace the air cleaner and foam pre-cleaner as recommended by the engine manufacturer.

A. Filling the Fuel Tank

Fill the fuel tank at the begining of each operating day to within 1 inch below the filler neck. Do not overfill. Use clean, fresh unleaded gasoline with a minimum octane rating of 87.

B. Replacing In-Line Fuel Filter Element

The in-line fuel filter (Figure 7-7) should be replaced after every 500 hours of operation or annually, whichever occurs first.

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Scag Power Equipment STT manual Engine Fuel System, Engine AIR Cleaner
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STT specifications

Scag Power Equipment is renowned for producing high-quality outdoor power equipment, and among its impressive lineup is the Scag STT series of zero-turn mowers. These machines are designed for professionals who require efficient, durable, and powerful mowing performance. The STT offers several features that set it apart from the competition, making it a fantastic choice for landscaping and lawn care businesses.

One of the standout features of the Scag STT is its powerful engine options. The mower is available with various engine choices, including the reliable Kawasaki and Kohler engines, which provide ample power to tackle even the toughest mowing tasks. With horsepower ratings reaching up to 25 HP, the STT ensures that operators can efficiently handle large properties and dense grass without any strain.

The STT's innovative design includes a robust steel frame and deck that provide exceptional durability and longevity. The mower's heavy-duty construction ensures it can withstand the rigors of daily professional use. The commercial-grade cutting deck is available in sizes ranging from 48 to 61 inches, allowing for versatility based on the user's specific needs. This deck features Scag's patented design, which enhances airflow for superior cutting performance and an immaculate finish.

Another key characteristic of the STT is its patented Velociti Drive System. This technology allows for faster ground speeds while maintaining optimum control, ensuring that operators can cover large areas quickly without sacrificing mowing quality. Additionally, the STT is equipped with a hydrostatic drive system that provides smooth acceleration and efficient operation, making it easy to navigate around obstacles and tight spaces.

Operators will also appreciate the comfort features incorporated into the STT design. The mower comes with a premium high-back seat, complete with adjustable armrests, which contributes to reduced fatigue during long mowing sessions. The ergonomic control layout, including easy-to-use controls and a spacious operator platform, enhances comfort and usability, making it ideal for professionals who spend hours mowing.

Maintenance is straightforward with the Scag STT, thanks to features like easy-access maintenance components and a simplified grease system. This design minimizes downtime and allows for quick servicing, enabling operators to spend more time on the job.

In summary, the Scag Power Equipment STT combines robust engineering, powerful engine options, and innovative technologies to deliver outstanding mowing performance. Its durability, comfort features, and ease of maintenance make it an excellent choice for landscape professionals looking for a reliable and efficient zero-turn mower for their business.
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