Cleaning the Discharge Tunnel and Plug

Remove the plug from the discharge tunnel and clean it after each use.

Always ensure that the discharge tunnel door closes securely when you release the handle. If the debris prevents the discharge door from closing securely, clean the inside of the discharge tunnel and the door thoroughly.

Warning

Grass clippings and other objects can be thrown from an open discharge tunnel and cause serious injury or kill the operator or bystanders.

Never start or operate the lawn mower unless one of the following is true:

The discharge tunnel plug is locked securely in the discharge tunnel.

The grass bag is locked in place.

The optional side discharge chute is locked in place.

The discharge tunnel door is locked in place.

Servicing the Air Cleaner

Inspect the air cleaner elements after every time you use the lawn mower.

Clean the cover, base, and foam and paper elements after every 25 operating hours. Replace the elements after every 250 operating hours or sooner if they are damaged or excessively dirty.

Important 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 (Fig. 6).

3.Remove the 2 wing bolts that secure the cover (Fig. 16).

1

2

3

4

5

 

 

 

m-6674

 

 

Figure 16

 

1.

Wing bolts

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 (Fig. 16).

6.Remove the foam element from the paper element (Fig. 16).

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 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.

Note: Do not use gasoline to clean the foam element because it could create a risk of fire or explosion.

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.

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Exmark Metro 21 manual Cleaning the Discharge Tunnel and Plug, Servicing the Air Cleaner