Maintenance

(ECXHNBBC21 and ECXHN21 Units). (May need more often if they are damaged or excessively dirty.)

Note: Do Not operate the engine without the air cleaner assembly; extreme engine damage will occur.

1.Stop the engine and wait for all moving parts to stop.

2.Disconnect the wire from the spark plug (Figure 9).

3.Remove the two wing nuts that secure the cover (Figure 27).

psi (207 kPa) through the filter from the wire screen side to remove any excess dirt. If the paper element is excessively dirty, replace it.

Note: Never try to brush dirt off the paper element; brushing forces the dirt into the fibers.

9.Clean the foam element in warm, soapy water or in a nonflammable solvent.

10.Rinse and dry the foam element thoroughly.

11.Dip the foam element in clean engine oil, then squeeze out the excess oil.

Note: Excess oil in the foam element restricts the air flow through the element and may reach the paper filter and clog it.

12.Wipe dirt from the base and the cover with a moist rag.

Note: Be careful to prevent dirt and debris from entering the air duct leading to the carburetor.

13.Install the air cleaner elements and ensure that they are properly positioned.

14.Securely install the cover with the two wing nuts.

Figure 27

1.

Wing nuts

4.

Foam element

2.

Cover

5.

Base

3.Paper element

4.Remove the cover.

Note: Be careful to prevent dirt and debris from falling into the base.

5.Remove the foam and paper elements from the base.

6.Remove the foam element from the paper element.

7.Inspect the foam and paper elements, and replace them if they are damaged or excessively dirty.

8.Tap the paper element on a hard surface several times or use compressed air not exceeding 30

Change Engine Oil

Service Interval: After the first 5 hours

Every 50 hours (May need more often under severe conditions.)

1.Run the engine to warm the engine oil.

Note: Warm oil flows better and carries more contaminates.

WARNING

Oil may be hot after engine has been run. Contact with hot oil can cause severe personal injury.

Avoid contacting the hot engine oil when you drain it.

2.Stop engine, wait for all moving parts to stop.

3.Disconnect the wire from the spark plug.

4.Drain the gasoline from the fuel tank. Refer to

Emptying the Fuel Tank and Cleaning the Fuel Filter section.

26

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Exmark COMMERCIAL 21 manual Change Engine Oil
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COMMERCIAL 21 specifications

The Exmark COMMERCIAL 21 is a top-tier commercial lawn mower designed to meet the rigorous demands of professional landscapers and lawn care providers. This robust machine combines innovative technology with ergonomic features to deliver exceptional performance, reliability, and ease of use.

One of the standout features of the COMMERCIAL 21 is its powerful engine. It is equipped with a reliable, high-performance engine that provides plenty of torque and power for tackling tough mowing conditions. This not only ensures efficiency but also enhances productivity, allowing operators to cover large areas in a shorter amount of time.

A significant advantage of the COMMERCIAL 21 is its patented MicroCut™ dual-blade system. This innovative cutting technology enhances the mowing quality by producing finer clippings. This results in an even cut and a higher-quality finish, leaving lawn surfaces looking meticulously manicured. The MicroCut blades are designed to prevent clogging, even in wet conditions, making the mower versatile for various grass types and environments.

Furthermore, the Exmark COMMERCIAL 21 features a durable and robust construction. Its heavy-duty steel deck can withstand the wear and tear of daily use while providing superior performance over time. The 21-inch cutting deck strikes a balance between maneuverability and cutting efficiency, making it ideal for residential areas, tight spots, and larger lawns alike.

When it comes to comfort, the COMMERCIAL 21 has ergonomically designed controls that make operation intuitive and user-friendly. The adjustable handle and padded grips help reduce operator fatigue during long mowing sessions, enabling professionals to work efficiently without discomfort.

For enhanced usability, this mower also has a quick-folding feature, allowing for easy transportation and storage. This attribute saves valuable time on the job site and ensures that the mower is ready to go when needed.

In addition to its robust features, the Exmark COMMERCIAL 21 incorporates user-friendly maintenance protocols. The easy-access engine and blade chambers facilitate routine checks, and the overall design promotes a longer lifespan with minimal maintenance requirements.

Overall, the Exmark COMMERCIAL 21 stands out in the market for its combination of power, performance, and user-centric design, making it an exceptional choice for professionals looking for a reliable and efficient lawn care solution. With its advanced features and technologies, it consistently delivers a superior mowing experience.
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