Exmark Metro 21 - Manual (Page 20)

16
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
5
3
4
m-6674
Figure 16
1. Wing bolts
2. Cover
3. Paper element
4. Foam element
5. Base
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.