Exmark Metro 21 Series - Manual (Page 30)

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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. 23).
6. Remove the foam element from the paper element (Fig. 23).
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.
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 2 wing bolts.
5.6 Maintaining the Blade
Always mow with a sharp blade. A sharp blade cuts cleanly and without tearing or
shredding the grass blades.
1. Stop the engine and wait for all moving parts to stop.
2. Disconnect the wire from the spark plug (Fig. 12 & 14).
3. Drain the gasoline from the fuel tank.
4. Tip the lawn mower onto its right side (Fig. 24 and 25.).
Wing Bolts
Cover
Paper Element
Foam Element
Base
G0217
Figure 23